专四语法专项训练 情态动词

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2015专四语法考点:情态动词*情态动词: will(愿意), shall(将), must(必须), can, may, would, should (应该), might, could, ought to, used to(过去常常), need(需要), dare(竟敢),have to(不得不)考试中,情态动词部分重点测试以下内容:(1)情态动词+行为动词完成式(表示推测)(2)某些情态动词的特殊用法考点1. 情态动词+have+过去分词结构表示推测(1) must have v-ed表示推测过去某事“一定”发生了。

否定形式为:can’t / couldn’t have v-ed, 表示过去不可能发生某事。

1. Nancy's gone to work but her car's still there. She _must have gone ___ by bus.2010A. must have goneB. should have goneC. ought to have goneD. could have gone2. She _must have been ____ fifty or so when I first met her at the conference.2009/2007A. must beB. had beenC. could beD. must have been3. Which of the following sentences expresses "probability"可能性超级大啊?2008A. You must leave immediately.B. You must be feeling rather tired.C. You must be here by eight o'clock.D. You must complete the reading assignment on time.4. He _could not have caught____ the 8:20 bus because he did n’t leave home till 8:25. (1994)A. can not /couldn’t have caughtB. ought to have caughtC. shouldn’t have caughtD. must not have caught5. –“She must be in the dormitory now.”--“No, she _can n ot ___ be there. I saw her in the classroom a minute ago.”(1994)A. mustn’tB. can’tC. couldn’tD. wouldn’t6. –“The door was open.”--“It _cannot have been___ open. I ha d locked in myself and the key was in my pocket.”(1992)A. can’t beB. mustn’t beC. can’t have beenD. mustn’t have been(2) could have v-ed 表示推测过去某动作“很可能”发生了。

(3) may / might have v-ed 表示推测过去某事“也许”发生了.1. He __may have acted __ unwisely, but he was at least trying to do something helpful. (1999)A. may have act edB. must have actedC. should actD. would act(4) ought to / should have v-ed 和ought not to / shouldn’t have v-ed 用于对已发生的情况表示“责备”、“不满”,分别表示“本应该…”和“本不应该…”表示应完成而未完成的动作用于完成时中的否定句,表示不应完成但已做的动作1. Aren't you tired? I _should have thought___ you had done enough for today.2009A. should have thoughtB. must have thoughtC. might have thoughtD. could have thought(5) needn’t have v-ed 表示过去做了某事,但没有做的必要,意为“本没必要…”。

注意:did not need to do 动作并没发生。

例:I didn’t need to get up early,so I got up until 9 a.m.1. You _neednot have told___ Jim anything about it. It was none of his business. (2000/1998)A. needn’t have toldB. needn’t tellC. mustn’t have toldD. mustn’t tell2. As it turned out to be a small house party, we _need not have dressed up____ so formally. (1996)A. need not have dressed upB. must not have dressed upC. did not need to dress upD. must not dress up3. The meeting’s been cancell ed. Ann _need not have done___ all that work. (1995)A. need to doB. need haveC. needn’t have doneD. needed not to do考点2. 特殊用法(1) can't“不可能”(表推测), may not “可能不”(表推测), mustn’t (must not) “不要; 禁止”; used not/usedn’t to或did n’t use to…过去不…(2) should 表示惊讶1. I am surprise d_that you should think_ t his city is a dull place to live in.2006A. that you should thinkB. by what you are thinkingC. that you would thinkD. with what you were thinking(3) 用于过去式中,can常表示能过做某事,但事实不一定去做;be able to则表示能做某事并且已经做了。

1. I went there in 1984, and that was the only occasion when I _was able to make_______ the journey in ex act ly two days.2005A. must takeB. must have madeC. was able to makeD. could make(4) Can’t but + V.,表示不得不,与have to同义。

Can’t help +Ving, can’t help but +V.表示忍不住。

(5) may/ might as well + 动词原形”意为“最好,满可以,倒不如”,相当于had better(6) may well + 动词原形”是一种常见的结构,意为“(完全)能,很可能” : He may well be proud of his son. 他大可为儿子高兴。

(7) may as well as还是…好了e.g. You may as well as give him the letter.(8) may……but….表转折(9) cannot … too / enough 表示“无论怎么……也不算过分”、“越……越好”(10) had better do dth 最好做某事。

1. That man has a bad reputation. You _had better not have_____ anything to do with him.1991A. had better not haveB. have better haveC. have better not haveD. had better not to have(11) 其它1. I _was to have finished___ writing the paper as scheduled, but my mother’s illness interfered. I hope you will excuse me.1993A.am to have finishedB.was to have finishedC.was to finishD.ought to finish2. They _do not have to leave___ a tip if the service is poor. (1990)A. don’t have to leaveB. must no leaveC. can not leaveD. do not leaveP。