语法是考研英语的基础,这部分在硕士研究生英语考试中不再单独考查,但是语法知识贯穿在整个英语考卷的各个题型中。考研英语完型填空题会直接考查语法知识;考研英语阅读理解题和英译汉中有大量的长难句,这些句子只有具备一定的语法知识才能正确分析;考研英语作文中要写出正确无误的句子,也需要语法知识。这部分基础如果欠缺,其它的综合能力提高起来将会很慢,所以所有考生都务必重视考研语法的复习。下面新东方在线考研频道为大家分享:“情态动词”。
1、情态动词的完成式
1)must have done——表示对过去的事情较有把握
的、肯定性的推测,常译为“一定,准是,肯定”,其否定形式是can’t/couldn’thave done,意为“决不可能,不太可能”。
e.g. Since the ditch is full of water, it must have rained last night.
2)should/ought to have done——表示过去应该做的
却没有做,常含有后悔、责备、埋怨的口吻,意为“本应该”,“应该就好了”; e.g. With all the work finished, I should have gone to your birthday party last night.
3)shouldn’t/ought not to have done——表示过去不该
做的事却给做了,也常含有责备、不满之意,意为“本不该”。
e.g. You shouldn’t have gone back to work yesterday without the doctor’s permission.
4)may/might have done——表示对过去的事情的推
测,但不十分有把握,意为“可能,或许已经”。 e.g. A traffic accident happened yesterday and a driver may have been hurt.
5)could have done——表示过去有可能或有能力做某
事,而实际未做、未能实现的事;有时也表示轻度批评,意为“本来可以,完全可以”。 e.g. The gas leakage could have been avoided if the
gas company took immediate measures after the warning call.
6)needn’t have done——表示过去做了某事,但没有做的必要,意为“其实没有必要”。 e.g. I needn’t have bought all that wine——only three people came.
2、可作情态动词用的短语
would rather, would sooner, would (just) as soon, had rather, had better, had sooner, cannot but, may/might as well
[例1]You all those calculations! We have a computer to do that sort of thing.
A. needn’t have done B. must not have done
C. shouldn’t have done D. can’t have done
[例2]I to him because he phoned me shortly afterwards.
A. ought to have written B. must have written
C. couldn’t have written D. needn’t have written
[例3]You those letters. Why didn’t you
A. should post B. must have posted
C. should have posted D. ought to post
以上就是为大家分享的“2021考研英语语法基础知识点讲解:情态动词 ”文章,考研英语语法复习起来应该有所侧重,必须有针对性,否则死扣考研英语语法,不但浪费时间,也不一定能有很好的效果。提醒考生在复习语法过程中要注意以下几个方面:有一本正规的语法书、重点掌握句法、以真题为依托。希望大家能在考研英语中考出高分。