备考英语六级:情态动词
情态动词(Modal verbs)指本身有一定的词义,表示语气的单词。不能独立作谓语,只能和动词原形一起构成谓语。下面是一些关于情态动词的语法知识,希望能帮到大家!
1.情态动词的完成式1)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.
2)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.
3)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.
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
-
大学英语六级作文预测题就业选择(通用7篇)
在生活、工作和学习中,大家都写过作文吧,写作文可以锻炼我们的'独处习惯,让自己的心静下来,思考自己未来的方向。你写作文时总是无从下笔?以下是小编为大家整理的大学英语六级作文预测题就业选择,希望对大家有所帮助。大学英语六级作文预测题就业选择篇1Nowadays,wi...
-
英语六级词汇精选试题2017
读书百遍,其义自见。以下是小编为大家搜索整理的英语六级词汇精选试题2017,希望对正在关注的您有所帮助!更多精彩内容请及时关注我们应届毕业生考试网![P12-43]Ifapersontalksabouthisweakpoints,hislistenerisexpectedtosaysomethinginthewayof_______.A)persua...
-
6月英语六级阅读真题及答案(卷一)
6月英语六级试卷答案出来啦,大家快过来瞧一瞧吧!以下是小编为大家搜索整理的6月英语六级阅读真题及答案(卷一),希望能给大家带来帮助!更多精彩内容请及时关注我们应届毕业生考试网!6月英语六级阅读真题及答案(卷一)篇1Recentresearchhasclaimedthatanexcessofpos...
-
2016下半年英语六级cet6仔细阅读练习题
2016年下半年英语六级考试迫在眉睫,同学们准备得如何?下面是yjbys网小编提供给大家关于英语六级cet6仔细阅读练习题,希望对大家的备考有所帮助。Questions1to5arebasedonthefollowingpassage.UniversityofYorkbiologistPeterMayhewrecentlyfoundthatglobalwarmin...