写论文摘要时以一般现在时为主。
介绍背景知识时,要用一般现在时,例如:
Speech recognition is the task of converting speech into text.
叙述研究现状时,也可以用一般现在时,例如:
This essay is to analyse how the era influences corporate cultures, and to give suggestions on the building of corporate cultures.
叙述研究结果时,大多数用一般过去时,例如:
Our text achieved the possibility above.