论文文献中常用英文句式

existence of time delay would deteriorate the performance of system or even be the important source of instability.     时滞的存在可能会破坏系统性能，甚至造成不稳定 delays are frequently encountered in many fields of science and engineering, and they are often a source of degradation in system performance or instability.     时滞现象频繁出现在许多科学和工程的领域中，并且它通常是导致系统性能下降或不稳定的原因。     3. In both delayed control and delayed measurement, the delay is usually considered undesirable since it has the tendency to deteriorate the system performance or even destabilize the system.     在具有延时的控制和测量中，时滞是不受待见的，因为它具有使系统性能恶化甚至使系统不稳定的趋势。 4. The last decade has shown an increasing research activity on time-delay and/or sampled-data systems analysis and control due to both emerging adapted theoretical tools and also practical issues in the engineering field and information technology (see Sipahi, Niculescu, Abdallah, Michiels, and Gu (2011) and Zhang, Branicky, and Phillips (2001) and references therein).     在过去的十年中，由于出现了新的适应性理论工具以及工程领域和信息技术领域的实际问题，因此在时延和/或采样数据系统分析和控制方面的研究活动不断增加（请参见Sipahi，Niculescu，Abdallah，Michiels ，以及Gu（2011）和Zhang，Branicky和Phillips（2001）以及其中的参考文献）。 , there has been rapidly growing interest in the stability of the system with time-varying delays, which has strong background in engineering field , such as a networked control system, see  for example [1,2]. 最近，时滞系统的稳定性问题引起了广泛的关注，这在工程领域有很强的背景，如网络控制系统 derived delay-dependent criteria based on the LKF approach are usually expressed in forms of linear matrix inequalities (LMIs), whose conservatism is often judged by the upper bound of the time-varying method of Lyapunov-Krasovskii function (LKF) is one of the most popular approaches. In LKF, some useful terms are not ignored but considered, which makes the result much less conservative.     LF泛函方法是重要的方法。考虑一些被忽略的项，能够降低保守性1. Delays can cause oscillations or bad performance in a system. This makes it necessary to study stability of time-delayed systems. In addition to stability, for some applications, it may be crucial to determine the convergence rate or the transient decaying rate of system states.     时滞会产生差的系统性能。研究时滞系统是必要的。除了稳定性以外，对于某些应用而言，确定系统状态的收敛速率或瞬态衰减速率可能至关重要。 1. Cross-coupling control idea is widely used to design the synchronization  controller,  which  can  be  seen  in literatures[2–8,11,13–17,20,22].     交叉控制思想已经广泛被用于设计同步控制器，如文献[2-8] 2. Steel rolling mill control  is an example of measurement delay, which is found in Sbarbaro-Hofer [240].     轧机控制是测量延迟的一个例子，可以在Sbarbaro Hofer[240]中找到。 3. Analysis of the delayed resonator  as well as  its applications  are reported  in [216, 217, 63, 125].     [216，217，63，125]对延迟谐振器及其应用进行了的分析。 4. For example, the finite dimensional systems could represent a dynamic controller for a system modeled by a PDE ( see d’Andréa Novel, Boustany, Conrad, and Rao (1994), Krstic (2009) and references therein ).     例如，有限维系统可以代表由PDE建模的系统的动态控制器（请参见d'AndréaNovel，Boustany，Conrad和Rao（1994），Krstic（2009）及其参考）。 5. Instead , a system of ordinary differential equations (ODEs) can model a component coupled to a phenomenon described by PDEs as in Daafouz, Tucsnak, and Valein (2014).     相反，如Daafouz，Tucsnak和Valein（2014）所述，常微分方程组（ODE）可以对与PDE描述的现象耦合的组件进行建模。 6. In the past few decades, fruitful results have been obtained for the robust stability of uncertain systems with time-varying delays by using the LKF approach.     过去几十年，时滞不确定系统的鲁棒稳定性已经取得丰硕研究成果，通过使用LKF方法 core idea behind an event-triggered control is that the update of control commands is only executed after the occurrence of an event rather than the lapse of time in a periodic fashion注意：介绍具体的现有研究工作，不是简单的堆叠，需要有层次，逻辑，目的。简单的说，要通过现有的结果，凸显出研究的必要性和重要性。基本上可以采取总—分—总的结构，     总：研究的主要方向，思路，方法     分：针对不同的方向，列举参考文献；注意不应随意列举，要有代表性，并且对文章有所点评，指出不足或优点。这部分的目的仍然是要突出             自己文章的优越性。     总：综上所述，本文研究的目的是为了解决现有文献中的哪些不足 1. The time domain method based on Lyapunov stability theory is abroad exploited . Among some inequality-based stability conditions, the linear matrix inequality (LMI) approach becomes a powerful and popular means to tackle the stability issues of power systems with  time-varying delays (see [4], [6], and [9]–[12]).     基于Lyapunov稳定理论的时域方法广泛研究。一些基于不等式的稳定性条件中，线性矩阵不等式的方法是解决具有时变时滞电力系统稳定问题的有效工具 2. To handle the time-varying and random delays, the time domain indirect methods based on Lyapunov stability theory and linear matrix inequality techniques (LMIs) have been proposed as an effective method to obtain approximate value of the delay margin [13].     为了处理时变时滞和随机时滞，基于Lyapunov稳定理论的时域直接方法和线性矩阵不等式技术已经成为获得时滞裕度近似值的一个有效方法 3. In order to diminish the conservatism for the stability conditions of time-varying delay systems, many approaches were developed. The main efforts have been focused on two aspects: one is the techniques of constructing L–K functional , such as delay-division functional, functional with matrices dependent on the time delays [13], functional including the ones with triple-integral terms [14], and quadratic terms which is multiplied by a higher degree scalar function [15] .The other is the analyzing methods for estimating the derivatives of L–K functionals with respect to time , such as improved majorization technique, free weighting matrix method [16], integral inequality including Jensen inequality [11], Wirtinger inequality [17], auxiliary function-based integral inequality [18],  and convex combination ideas incorporating linear convex analysis [19], reciprocal convex technique [20], and quadratic convex approach [21].     许多方法被用来减少时变时滞系统稳定判据的保守性。主要工作集中在两个方面：一是L-K泛函的构建，如：时滞分割函数，其函数矩阵决于时滞[13]，具有三重积分项的函数[14]，和高阶标量函数相乘的二次项[15]。另一方面是估计L-K泛函时间导数的分析方法，如：改进的专业化技术，自由加权矩阵方法[16]，Jensen不等式[11]，Wirtinger不等式[17]，基于辅助函数的积分不等式[18]以及结合线性凸分析的凸组合思想[19] ，倒凸技术[20]和二次凸方法[21]。 4. The last decade has seen a tremendous emergence of research devoted to the construction of Lyapunov–Krasovskii functionals which aims at reducing the inherent conservatism of this approach.     过去10年中，大量研究致力于构造L-K泛函，旨在减少固有保守性  Apart the choice of the functional, an important source of conservatism relies also on the way to bound some cross terms arisen when manipulating the derivative of the Lyapunov–Krasovskii functional.     除了泛函的选择，保守性的另一个来源是处理L-K泛函导数时产生的交叉项 1. Zhang et al. [1] have developed chaotic speed synchronization controller for multiple induction motors by using stator flux regulation. xx[1] 利用 定子磁通量调节技术 开发 了 用于 多个感应电动机的混沌速度同步控制器。 2. Starting from a semi-group modeling of the PDEs, the authors of Gahlawat and Peet (2017) construct a very general Lyapunov functional whose parameters are optimized via a sum of square procedure ( see also Ahmadi, Valmorbida, & Papachristodoulou, 2016).     起始于PDEs的半群模型，(2017)中的作者构建了一个非常一般化的Lyapunov 泛函，其参数通过平方和流程优化 1. In combination with a simple choice of Lyapunov–Krasovskii functionals, this inequality leads to new stability criteria for linear time-delay and sampled-data systems.     结合简单选择的Lyapunov–Krasovskii函数，这种不等式能够得到线性时滞和采样数据系统的新稳定性标准。1. 在现有文献中      reported in the literature 2. 近年来/多年        in the last decade  3.研究结果被推广  The result of this study can be generalized for …   4. 本文旨在讨论      It is the aim(intend, purpose) of this paper to discuss (present, describe)    5. 已经得到             have concluded, gained, obtained, yielded, arrived at, generated, acquired, achieved 6. 结果表明             This result(fact, demonstration, illustration, classification, comparison, analyses) gives (shows)  7.公式是基于          The formulas is derived for … according to … 1. Do not hesitate to contact me if I can be of any assistance.

使用率高的英文写作中常用句式1．表示原因1）There are three reasons for this．2）The reasons for this are as follows．3）The reason for this is obvious．4）The reason for this is not far to seek．5）The reason for this is that．．．6）We have good reason to believe that．．．例如：There are three reasons for the changes that have taken place in our life．Firstly，people’s living standard has been greatly improved．Secondly，most people are well paid， and they can afford what they need or like．Last but not least，more and more people prefer to enjoy modern life．注：如考生写第一个句子没有把握，可将其改写成两个句子。如：Great changes have taken place in our life． There are three reasons for this．这样写可以避免套用中的表达失误。2．表示好处1）It has the following advantages．2）It does us a lot of good．3）It benefits us quite a lot．4）It is beneficial to us．5）It is of great benefit to us．例如：Books are like friends．They can help us know the world better，and they can open our minds and widen our horizons．Therefore，reading extensively is of great benefit to us．3．表示坏处1）It has more disadvantages than advantages．2）It does us much harm．3）It is harmful to us．例如：However，everything divides into two．Television can also be harmful to us．It can do harm to our health and make us lazy if we spend too much time watching television．4．表示重要、必要、困难、方便、可能1）It is important（necessary，difficult，convenient， possible）for sb．to do sth．2）We think it necessary to do sth．3）It plays an important role in our life．例如：Computers are now being used everywhere，whether in the government，in schools or in business．Soon， computers will be found in every home，too．We have good reason to say that computers are playing an increasingly important role in our life and we have stepped into the Computer Age．5．表示措施1）We should take some effective measures．2）We should try our best to overcome（conquer）the difficulties．3）We should do our utmost in doing sth．4）We should solve the problems that we are confronted（faced）with．例如：The housing problem that we are confronted with is becoming more and more serious．Therefore，we must take some effective measures to solve it．6．表示变化1）Some changes have taken place in the past five years．2）A great change will certainly be produced in the world’s communications．3）The computer has brought about many changes in education．例如：Some changes have taken place in people’s diet in the past five years．The major reasons for these changes are not far to seek．Nowadays，more and more people are switching from grain to meat for protein，and from fruit and vegetable to milk for vitamins．7．表示事实、现状1）We cannot ignore the fact that．．．2）No one can deny the fact that．．．3）There is no denying the fact that．．．4）This is a phenomenon that many people are interested in．5）However，that’s not the case．例如：We cannot ignore the fact that industrialization brings with it the problems of pollution．To solve these problems， we can start by educating the public about the hazards of pollution．The government on its part should also design stricter laws to promote a cleaner environment．8．表示比较1）Compared with A，B．．．2）I prefer to read rather than watch TV．3）There is a striking contrast between them．例如：Compared with cars，bicycles have several advantages besides being affordable．Firstly，they do not consume natural resources of petroleum．Secondly，they do not cause the pollution problem．Last but not least，they contribute to people’s health by giving them due physical exercise．9．表示数量1）It has increased（decreased）from．．．to．．．2）The population in this city has now increased （decreased）to 800，000．3）The output of July in this factory increased by 15％ compared with that of January．例如：With the improvement of the living standard，the proportion of people’s income spent on food has decreased while that spent on education has increased．再如：From the graph listed above，it can be seen that student use of computers has increased from an average of less than two hours per week in 1990 to 20 hours in 2000．10．表示看法1）People have（take，adopt，assume）different attitudes towards sth．2）People have different opinions on this problem．3）People take different views of（on）the question．4）Some people believe that．．．Others argue that．．．例如：People have different attitudes towards failure．Some believe that failure leads to success．Every failure they experience translates into a greater chance of success at their renewed endeavor．However， others are easily discouraged by failures and put themselves into the category of losers．再如：Do “lucky numbers really bring good luck？Different people have different views on it．注：一个段落有时很适宜以问句开始，考生应掌握这一写作方法。11．表示结论1）In short，it can be said that ．．．2）It may be briefly summed up as follows．3）From what has been mentioned above，we can come to the conclusion that ．．．例如：From what has been mentioned above，we can come to the conclusion that examination is necessary，however， its method should be improved．注：例句1可用于任何一个段落的结论句；例句3则多用文章结论段的第一句。12．套语1）It’s well known to us that ．．．2）As is known to us，．．．3）This is a topic that is being widely talked about．4）From the graph（table，chart）listed above，it can be seen that ．．．5）As a proverb says，“Where there is a will，there is a way． 例如：As is well known to us，it is important for the students to know the world outside campus．The reason for this is obvious．Nowadays，the society is changing and developing rapidly，and the campus is no longer an “ivory tower ．As college students，we must get in touch with the world outside the campus．Only in this way can we adapt ourselves to the society quickly after we graduate．再如：Does it pay to be honest？This is a topic that is being widely talked about and different people have different opinions on it．

上面各位的回答都不错，我给你找的是专门针对考研用的，因为看你的年纪应该不是为了考四六级这么简单了吧。 写作是语言的重要环节，看看英语考试中对作文的重视就明白了。在考研中，写作意义极其重大，其性价比（即投入的时间和提高的幅度）非常高，在我看来，如果你的阅读水平还可以的话，写作将是你的突破口。 提高写作只有一个字——“恒”，绝对的熟能生巧。我在网上看过高手写的文章，简直可以用恐怖来形容，完全是阅读理解的水平，而作者的诀窍就是每天写每天练！只要不断的写不断的改，你的文章会让你自己吃惊。套用一句：写作恒久远，练习永流传。 然而备考的时间是很紧的，不可能每天保持大量的练习，好在其要求也不高，从现在开始，到考前完全可以达到要求，但千万不要间断！很多同学都有一个情况，越不写，越怕写；越怕写，越不写。万事开头难，所以开始的练习尤为重要，而练习应以词句为主+阅读好文章，我就有一本记录本，专门收集好的词句，效果很好。这里列其中一些较简单实用的，希望能对大家有所帮助（不过，建议同学们最好自己写，自己收集，印象会深很多，每天花10分钟过过，绝对值得。另外，我列的句子很有限，多半是骨架，大家要学会扩展，并且在记忆的时候多联想一下。举例来说，一篇你的文章，用心改一下，好好套用几个句式，改些档次较高的词和词组，可以提高不少哦）： 一． 总结句型 1) ***in general/above all/with the result that/as a result/consequently, *** 2) As far as I am concerned/as for me, *** 3) This truth above seems to be self-evident. 4) Whether we examine the ***above, such things can happens anywhere anytime to anyone. 5) In my point of view, I like/prefer A much more than B. 6) I still prefer A, however, for they teach me not only to be ***but also to be*** ，both in ***and in***. 7) There is no doubt that*** 8) In order to make our world a better place in which to live we should efforts to*** 9) To a large extent, ***, therefore, reflects*** 10) If all above mentioned measures are achieved, *** 11) Wherever you are and whatever you do, ***is always meaningful. 12) So clear/evident/obvious it is that there are quite different opinions on it. 13) Now, which one do you prefer-----the one***or the one***? Were it left to me to select, I should not hesitated a moment to choose the former/latter. 二． 开首句型 1) Have you ever gone***? Have you ever been to***? If you have no experience like these, your life is an inadequate one. 2) Are you***? Are you***? We are, usually. 3) In large part as a consequence of***, somebody have focused a great deal of attention in recent years on something. 4) We expect the day will come when A with its characteristic of*** 5) Being adj. is one of the virtues that people must possess (not only in***but also in***/during***/when***) 6) What A to B, that C to D 7) Currently, there is a widespread/serious concern over that*** 8) The reasons for the***are manifold, for instance, *** 9) Several factors contribute to this***, such as***, as for as I’m concerned, however, ***is the most significant ingredient/element. 10) ***is more violent than what we thought it should be before. 11) There are intimate relations between the two. 三． 并列句型 1) Some people like A due to***. However, there are many young people, including me, especially like B. 2) There might be two reasons, I think***, for the change. 3) A and B are both important, they are attribute which are equally necessary for a person to achieve success in his life. 4) Different people have different attitudes towards***, some believe that***others, however, argue that***still others maintain that*** 5) First***besides, in addition***what’s more*** 6) For one thing***nevertheless, for another*** 四． 转折句型 1)***Such defects as mentioned above can be prevented by the other way of *** 2) Except for ***’s sake only. 3) Perhaps A is the wrong word, however, B might be better. 4) First***last but not least*** 5) Shall we do this? Not necessary the case. 6) ***, and vice versa indeed . 7) On the contrary, in spite of these increase*** 8) Compared with A, B has many advantages such as*** 9) Not so much*** as he had talked about. 10) ***, the truth of the matter, however, is that*** 11) For some, the way maybe right, nevertheless, for many others*** 12) As everything going to the extreme has its negative aspects, so has*** 13) It is fairly well know that***however, it is less know that*** 14) ***, but this was not always the case. 15) At first, ***different in their opinions, on second thoughts, however, all of them agree to*** 16) None the less(尽管如此)*** 17) When people succeed, it is because of hard work, however, luck has a lot to do with it too. 18) ***, sometimes it isn’t totally the case, however. 19) Do some A else but B. 五． 名理句型 1) It is usually the case that *** 2) It is plain common sense---the more/less***the more/less*** 3) The serious reality had taught us a lesson: not being environment friendly will be avenged mercilessly. 4) As a proverb says/as is known to all/as a popular saying goes, *** 5) I can think of no better illustration than an English poem/adage which goes like this:*** 6) The old story of***can serve as a good illustration that*** 六． 强调句型 1) With/due to/spurred by***we can certainly cope with any task we are faced with, that is, *** 2) The reason why***is no other than***as I know. 3) The same thing is true with*** 4) What I want to point out is that, for a person who wants to be successful in life and to be useful in society, he will have to learn to be both A and B. 5) What a wonderful picture? Especially for we students always swimming in the sea of books! 6) It’s high time that immediate measures were taken to better the strength and face the challenges. 7) Before everything else, ***is the secret of success. 七． 图表句型 1) From the figures/statistics given in the table it can be seen/noticed that*** 2) From the graph/table/diagram/chart above, we can see that***obviously. 3) As show in the chart/by the graph*** 4) Have you ever anticipated the prospects of***in the coming decades? Let us just take a look at the figures of***as shown in the graph above. 5) The gap between***and***will be further widened. 6) In face of increasingly serious shortage of energy, we should take effective measures/which of the measures we should take? 7) It is clear that the increase of percentage gets greater and greater. 8) By***, the number of***had less/more than doubled/tripled compared with that of*** 9) 短语：made up about***/the figure amounted to/will rise to/will reach/will double that/will tripled that 另外，文章结尾也很重要，它的作用是概括全文内容，进一步强调或肯定文章的中心思想，使文章意义表达得更加深刻。 文章结尾的形式也是多种多样的，常见的有以下几种： 1．首尾呼应，画龙点睛 在文章的结尾，把含义较深的话放在末尾，以点明主题，深化主题，起到画龙点睛的效果。如"I Cannot Forget Her" (我忘不了她)的结尾： After her death, I felt as if something were missing in my life. I was sad over her passing away, but I knew she would not have had any regrets at having given her life for the benefit of the people. 2．重复主题句 结尾回到文章开头阐明的中心思想或主题句上，达到强调的效果。如“I Love My Home Town”(我爱家乡)的结尾： I love my home town, and I love its people. They too have changed. They are going all out to do more for the good of our motherland. 3. 自然结尾 随着文章的结束，文章自然而然地结尾。如“Fishing”(钓鱼)的结尾： I caught as many as twenty fish in two hours, but my brother caught many more. Tired from fishing, we lay down on the river bank, bathing in the sun. We returned home very late. 4．含蓄性的结尾 用比喻或含蓄的手法不直接点明作者的看法，而是让读者自己去领会和思考。如“A Day of Harvesting”(收割的日子)的结尾： Evening came before we realized it. We put down our sickles and looked at each other. Our clothes were wet with sweat, but on every face there was a smile. 5．用反问结尾 虽然形式是问句，但意义却是肯定的，并具有特别的强调作用，引起读者深思。如 "Should We Learn to Do Housework?" (我们要不要学做家务?) 的结尾。 Everyone should learn to do housework. Don’t you agree, boys and girls? 6．指明方向，激励读者 结尾表示对将来的展望，或期待读者投入行动。如“Let’s Go in for Sports”(让我们参加体育运动)的结尾： As we have said above, sports can be of great value. They not only make people live happily but also help people to learn virtues and do their work bettter. A sound mind is in a sound body. Let’s go in for sports. 文章的结尾没有一定的模式，可以根据表达主题的需要灵活创造。一般的习惯是，一些记叙文和描写文经常采用自然结尾的方法；但说理性和逻辑性较强的说明文和议论文则往往都有结束语，以便使文章首尾呼应，结构完整。

英文写作必背之35句型一、~~~ the + ~ est + 名词 + (that) + 主词 + have ever + seen ( known/heard/had/read, etc) ~~~ the most + 形容词 + 名词 + (that) + 主词 + have ever + seen ( known/heard/had/read, etc) 例句：Helen is the most beautiful girl that I have ever seen. 海伦是我所看过最美丽的女孩。Mr. Chang is the kindest teacher that I have ever had. 张老师是我曾经遇到最仁慈的教师。二、Nothing is + ~~~ er than to + V Nothing is + more + 形容词 + than to + V 例句：Nothing is more important than to receive education. 没有比接受教育更重要的事。 三、~~~ cannot emphasize the importance of ~~~ too much.（再怎么强调...的重要性也不为过。） 例句：We cannot emphasize the importance of protecting our eyes too much. 我们再怎么强调保护眼睛的重要性也不为过。四、There is no denying that + S + V ...（不可否认的...） 例句：There is no denying that the qualities of our living have gone from bad to worse.不可否认的，我们的生活品质已经每况愈下。 五、It is universally acknowledged that + 句子~~ （全世界都知道...）例句：It is universally acknowledged that trees are indispensable to us. 全世界都知道树木对我们是不可或缺的。 六、There is no doubt that + 句子~~ （毫无疑问的...） 例句：There is no doubt that our educational system leaves something to be desired. 毫无疑问的我们的教育制度令人不满意。 七、An advantage of ~~~ is that + 句子 （...的优点是...） 例句：An advantage of using the solar energy is that it won't create (produce) any pollution. 使用太阳能的优点是它不会制造任何污染。 八、The reason why + 句子 ~~~ is that + 句子 （...的原因是...） 例句：The reason why we have to grow trees is that they can provide us with fresh air./ The reason why we have to grow trees is that they can supply fresh air for us. 我们必须种树的原因是它们能供应我们新鲜的空气。 九、So + 形容词 + be + 主词 + that + 句子 （如此...以致于...） 例句：So precious is time that we can't afford to waste it. 时间是如此珍贵，我们经不起浪费它。 十、Adj + as + Subject（主词）+ be, S + V~~~ （虽然...） 例句：Rich as our country is, the qualities of our living are by no means satisfactory. {by no means = in no way = on no account 一点也不}虽然我们的国家富有，我们的生活品质绝对令人不满意。十一、The + ~er + S + V, ~~~ the + ~er + S + V ~~~ The + more + Adj + S + V, ~~~ the + more + Adj + S + V ~~~（愈...愈...） 例句：The harder you weww progress you make. 你愈努力，你愈进步。 The more books we read, the more learned we become. 我们书读愈多，我们愈有学问。 十二、By +Ving, ~~ can ~~ （借着...，..能够..） 例句：By taking exercise, we can always stay healthy. 借着做运动，我们能够始终保持健康。 十三、~~~ enable + Object（受词）+ to + V （..使..能够..） 例句：Listening to music enable us to feel relaxed. 听音乐使我们能够感觉轻松。 十四、On no account can we + V ~~~ （我们绝对不能...） 例句：On no account can we ignore the value of knowledge. 我们绝对不能忽略知识的价值。 十五、It is time + S + 过去式 （该是...的时候了） 例句：It is time the authorities concerned took proper steps to solve the traffic problems. 该是有关当局采取适当的措施来解决交通问题的时候了。 十六、Those who ~~~ （...的人...） 例句：Those who violate traffic regulations should be punished. 违反交通规定的人应该受处罚。 十七、There is no one but ~~~ （没有人不...） 例句：There is no one but longs to go to college. 没有人不渴望上大学。 十八、be + forced/compelled/obliged + to + V （不得不...） 例句：Since the examination is around the corner, I am compelled to give up doing sports. 既然考试迫在眉睫，我不得不放弃做运动。 十九、It is conceivable that + 句子 （可想而知的） It is obvious that + 句子 （明显的） It is apparent that + 句子 （显然的） 例句：It is conceivable that knowledge plays an important role in our life. 可想而知，知识在我们的一生中扮演一个重要的角色。 二十、That is the reason why ~~~ （那就是...的原因） 例句：Summer is sultry. That is the reason why I don't like it. 夏天很燠热。那就是我不喜欢它的原因。 二十一、For the past + 时间，S + 现在完成式...（过去...年来，...一直...） 例句：For the past two years, I have been busy preparing for the examination. 过去两年来，我一直忙着准备考试。 二十二、Since + S + 过去式，S + 现在完成式。 例句：Since he went to senior high school, he has worked very hard. 自从他上高中，他一直很用功。二十三、It pays to + V ~~~ （...是值得的。） 例句：It pays to help others. 帮助别人是值得的。 二十四、be based on （以...为基础） 例句：The progress of thee society is based on harmony. 社会的进步是以和谐为基础的。 二十五、Spare no effort to + V （不遗余力的） 例句：We should spare no effort to beautify our environment. 我们应该不遗余力的美化我们的环境。 二十六、bring home to + 人 + 事 （让...明白...事） 例句：We should bring home to people the value of working hard. 我们应该让人们明白努力的价值。 二十七、be closely related to ~~ （与...息息相关） 例句：Taking exercise is closely related to health. 做运动与健康息息相关。 二十八、Get into the habit of + Ving = make it a rule to + V （养成...的习惯） We should get into the habit of keeping good hours. 我们应该养成早睡早起的习惯。 二十九、Due to/Owing to/Thanks to + N/Ving, ~~~ （因为...） 例句：Thanks to his encouragement, I finally realized my dream. 因为他的鼓励，我终于实现我的梦想。 三十、What a + Adj + N + S + V!= How + Adj + a + N + V!（多么...！） 例句：What an important thing it is to keep our promise! How important a thing it is to keep our promise! 遵守诺言是多么重要的事！ 三十一、Leave much to be desired （令人不满意） 例句：The condition of our traffic leaves much to be desired. 我们的交通状况令人不满意。 三十二、Have a great influence on ~~~ （对...有很大的影响） 例句：Smoking has a great influence on our health. 抽烟对我们的健康有很大的影响。 三十三、do good to （对...有益），do harm to （对...有害） 例句：Reading does good to our mind.读书对心灵有益。 Overwork does harm to health.工作过度对健康有害。 三十四、Pose a great threat to ~~ （对...造成一大威胁） 例句：Pollution poses a great threat to our existence. 污染对我们的生存造成一大威胁。 三十五、do one's utmost to + V = do one's best （尽全力去...） 例句：We should do our utmost to achieve our goal in life. 我们应尽全力去达成我们的人生目标。

以下是短文写作中使用率最高、覆盖面最广的基本句式，每组句式的功能相同或相似，考生可根据自己的情况选择其中的1－2个，做到能够熟练正确地仿写或套用。 1．表示原因 1）There are three reasons for this． 2）The reasons for this are as follows． 3）The reason for this is obvious． 4）The reason for this is not far to seek． 5）The reason for this is that．．． 6）We have good reason to believe that．．． 例如： There are three reasons for the changes that have taken place in our life．Firstly，people’s living standard has been greatly improved．Secondly，most people are well paid， and they can afford what they need or like．Last but not least，more and more people prefer to enjoy modern life． 注：如考生写第一个句子没有把握，可将其改写成两个句子。如：Great changes have taken place in our life． There are three reasons for this．这样写可以避免套用中的表达失误。 2．表示好处 1）It has the following advantages． 2）It does us a lot of good． 3）It benefits us quite a lot． 4）It is beneficial to us． 5）It is of great benefit to us． 例如： Books are like friends．They can help us know the world better，and they can open our minds and widen our horizons．Therefore，reading extensively is of great benefit to us． 3．表示坏处 1）It has more disadvantages than advantages． 2）It does us much harm． 3）It is harmful to us． 例如： However，everything divides into two．Television can also be harmful to us．It can do harm to our health and make us lazy if we spend too much time watching television． 4．表示重要、必要、困难、方便、可能 1）It is important（necessary，difficult，convenient， possible）for sb．to do sth． 2）We think it necessary to do sth． 3）It plays an important role in our life． 例如： Computers are now being used everywhere，whether in the government，in schools or in business．Soon， computers will be found in every home，too．We have good reason to say that computers are playing an increasingly important role in our life and we have stepped into the Computer Age． 5．表示措施 1）We should take some effective measures． 2）We should try our best to overcome（conquer）the difficulties． 3）We should do our utmost in doing sth． 4）We should solve the problems that we are confronted（faced）with． 例如： The housing problem that we are confronted with is becoming more and more serious．Therefore，we must take some effective measures to solve it． 6．表示变化 1）Some changes have taken place in the past five years． 2）A great change will certainly be produced in the world’s communications． 3）The computer has brought about many changes in education． 例如： Some changes have taken place in people’s diet in the past five years．The major reasons for these changes are not far to seek．Nowadays，more and more people are switching from grain to meat for protein，and from fruit and vegetable to milk for vitamins． 7．表示事实、现状 1）We cannot ignore the fact that．．． 2）No one can deny the fact that．．． 3）There is no denying the fact that．．． 4）This is a phenomenon that many people are interested in． 5）However，that’s not the case． 例如： We cannot ignore the fact that industrialization brings with it the problems of pollution．To solve these problems， we can start by educating the public about the hazards of pollution．The government on its part should also design stricter laws to promote a cleaner environment． 8．表示比较 1）Compared with A，B．．． 2）I prefer to read rather than watch TV． 3）There is a striking contrast between them． 例如： Compared with cars，bicycles have several advantages besides being affordable．Firstly，they do not consume natural resources of petroleum．Secondly，they do not cause the pollution problem．Last but not least，they contribute to people’s health by giving them due physical exercise． 9．表示数量 1）It has increased（decreased）from．．．to．．． 2）The population in this city has now increased （decreased）to 800，000． 3）The output of July in this factory increased by 15％ compared with that of January． 例如： With the improvement of the living standard，the proportion of people’s income spent on food has decreased while that spent on education has increased． 再如： From the graph listed above，it can be seen that student use of computers has increased from an average of less than two hours per week in 1990 to 20 hours in 2000． 10．表示看法 1）People have（take，adopt，assume）different attitudes towards sth． 2）People have different opinions on this problem． 3）People take different views of（on）the question． 4）Some people believe that．．．Others argue that．．． 例如： People have different attitudes towards failure．Some believe that failure leads to success． Every failure they experience translates into a greater chance of success at their renewed endeavor．However， others are easily discouraged by failures and put themselves into the category of losers． 再如： Do “lucky numbers really bring good luck？Different people have different views on it． 注：一个段落有时很适宜以问句开始，考生应掌握这一写作方法。 11．表示结论 1）In short，it can be said that ．．． 2）It may be briefly summed up as follows． 3）From what has been mentioned above，we can come to the conclusion that ．．． 例如： From what has been mentioned above，we can come to the conclusion that examination is necessary，however， its method should be improved． 注：例句1可用于任何一个段落的结论句；例句3则多用文章结论段的第一句。 12．套语 1）It’s well known to us that ．．． 2）As is known to us，．．． 3）This is a topic that is being widely talked about． 4）From the graph（table，chart）listed above，it can be seen that ．．． 5）As a proverb says，“Where there is a will，there is a way． 例如： As is well known to us，it is important for the students to know the world outside campus． The reason for this is obvious．Nowadays，the society is changing and developing rapidly，and the campus is no longer an “ivory tower ．As college students，we must get in touch with the world outside the campus．Only in this way can we adapt ourselves to the society quickly after we graduate． 再如： Does it pay to be honest？This is a topic that is being widely talked about and different people have different opinions on it．