英语谓语动词时态总共有16种,其中在SCI论文中用得较多的主要是3种:一般现在时、一般过去时和将来时。如果论文中的时态用得不对,往往会改变作者的意思,影响专家和读者的理解。通常一篇SCI论文会包括Abstract、Materials and Methods、Results、Conclusion、Discussion、Acknowledgments、References几个部分,大多是大同小异,比如有的可能会有Summary、Supplemental Data等。下面我将根据这个论文框架为大家介绍不同部分常用的英文时态。首先,我们要知道论文中选取不同英语时态的3个基本参考标准:1. 一般现在时主要用于不受限制的客观存在事实的描述,通常存在写论文时的感觉、状态和关系等描述,以及Acknowledgments(致谢)中。值得注意的是,对于别人已发表的成果,出于尊重,不用过去时,而是用一般现在时。2. 一般过去时主要用在描述作者所做的工作、比如材料、方法和结构等。3. 一般将来时主要用于撰写论文后发生的工作或状态,比如提出下一步的研究方向。知道了这3个基本参考标准后,下面我从论文的不同部分进行分析该用什么时态:Abstract:摘要反映的是我们自己的研究成果,所以用一般过去时。Introduction:1. Introduction中的研究背景通常引用相关学科中广为接受的原理或事实,以及你所做研究的重要性,这些通常采用一般现在时。例子:Genomics provides crucial information for rational drug . 在Introduction中也可能引用与你的研究相关的一些研究结果,为表达你对该研究结果仍坚信其正确性及相关性,即使已经是很久以前的研究结果,可使用一般现在时。例子:Garcia (1993) suggested that under certain conditions, an individual’s deposit income is the same as the income from purchased national debt, thus changes in the amount of bank loans and deposits caused by changes in the amount of reserves will eventually affect the bond price.与上面一条相应的,如果该研究成果已经过时或失效,则用一般过去时。例子:Nineteenth-century physicians held that women got migraines because they were "the weaker sex," but current research shows that the causes of migraine are unrelated to and Methods:此部分是对自己之前所做工作的描述,因此用一般过去时。例子1:Total phosphorous (TP) and total nitrogen (TN) were measured in the laboratory using standard procedures.例子2:The standard protocol was followed for the preparation of the media from stock :这里分为两种情况,如果是描述图表内容的Results,表示写论文时的状态,用一般现在时。例子1: Figure 1 displays the comparative variation in the morphology of donor chromatin in both age groups of oocytes.例子2:Table 1 below shows the stream flows calculated for each stream using Equation 1.如果是描述自己得出的研究成果,则用一般过去时进行详细阐述。例子1:Overall, more than 70% of the insects collected were non-phytophagous.例子2:Following activation of NT oocytes with strontium, the cell cycle resumed in both :此处也分为两种情况,当表达研究结果意义的时候用一般现在时。例子:Removal of vegetation for agricultural purposes appears to negatively affect the water quality of streams.当表示总结研究成果时用一般过去时,当对研究成果进行解释和讨论时用一般现在时。例子1:Weight increased as the nutritional value of feed increased. These results suggest that feeds higher in nutritional value contribute to greater weight gain in livestock. 这个例子在描述实验发现时用一般过去时,在讨论这个发现的意义是用一般现在时。例子2:Leaf carbon and phenolic content did not differ across sites, indicating that the response of secondary plant chemicals such as phenolics to water is complex. 这个例子用一般现在时表明作者坚信其研究结果和结论的正确性。Conclusion:当强调过去研究成果时用一般过去时,当展望未来的研究方向或者研究前景时用一般现在时或将来时。例子:Although the study found evidence of tillage and irrigation within the study area, from the data collected it was not possible to determine if the effects of agriculture upstream cause (or caused) higher levels of total nitrogen downstream. Further studies are therefore necessary to determine the effects of agriculture on the health of Stringybark Creek.今天关于SCI论文中英语语态的问题就讲这么多,应该是比较详细了,希望你在翻译的时候能够比较清晰,对这个问题不要再糊涂了。