高考英语情态动词课件
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本不应该做什么
本不必做,而做了…
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高考真题演练
策划:《学生双语报》
1. - She looks very happy. She __ have passed the exam. - I guess so. It’s not difficult after all. A. should B. could C. must D. might 2. She ___ have left school, for her bike is still here. A. can’t B. wouldn’t C. shouldn’t D. needn’t
他一定有辆小汽车。 (现在)
He must be doing his exercises. (must be doing)
他一定正在做练习。 (正在进行)
He must have finished the work.(must have done)
他一定已完成了工作。 (过去发生)
策划:《学生双语报》
策划:《学生双语报》
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二、could have done 它表示"过去本来能够…" 实际上没能做…。如 1、I could have run 100 metres in 12 seconds. 我本来能用12秒钟完100米的.(实际上没能)
策划:《学生双语报》
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三、needn’t have done 它表示过去已做的事,事实上没有必要。如, 1、I need not have got up so early . 我本来不必要那么早起床的(事实上早已起床) 2、I need not have waited for the train for an hour. 我本来不必要等一个小时的火车。 (事实上已经等了一个小时)
你妈妈现在 一定在找你。 策划:《学生双语报》
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may (might) have been hurt 5. Philip ________________________ seriously in the car accident yesterday.
可能在车祸中受了重伤.
6. ---Linda has gone to work, but her bicycle is still here. may (might) have gone ---She _____________________ (go) by bus. 7. Mike ________________ his car, for he came to can’t have found
策划:《学生双语报》
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情态动词+have+done” 表“本来…” 使用情形分析
一、should have done过去本来应该 (而实际上并没有…) should not have done 本不应该 …而实际上却已 经…” 如:1、We should have studied last night, but we went to the concert instead . 我们昨晚本应学习的,但我们 却去看音乐会了。(实际上没有学习)
策划:《学生双语报》 6
(3)may, might可以推测现在的动作,正在发生的 动作或过去发生的动作。 He may have a car.(现在) He may / might be sleeping . (正在发生) These students may / might have seen the film before.(过去) 这些学生以前可能看过这部电影。
注:在表推测中,might不表示过去时态,只是语气上比may 更委婉,表示的可能性更小。
策划:《学生双语报》 7
can/could
1. can /could 表示推测时,只能用在否定句或疑问句 中。 这个人不可能是玛丽, 她生病了。 It can’t be Mary. She has fallen ill.
这时,我们老师一定在批改试卷。
must have rained 3. The road is wet. It ________________ last night.
(rain)
must be looking 4. Your mother ______________________ for you.
may/might + 动词原形:
may/might + be doing
may/might + have done (无否定)
3、can/could:用于否定和疑问,
can‘t/couldn’t + 动词原形:“不可能……” can‘t/couldn’t + be doing:“不可能在做……” can‘t/couldn’t + have done:“不可能已经……”
策划:《学生双语报》 10
may 1. I don't know where she is, she _______ be in Wuhan. must be marking 2. At this moment, our teacher ________________
our exam papers.(mark)
2. can’t/could’t have done 对过去发生行为的可能性 进行推测:
刚才我还看见他了, 所以他不可能出国的。
I saw him just now so he couldn’t have gone abroad. 门是锁着的, 所以那时她不可能在家。(lock) The door was locked,so she couldn’t have been at home then.
策划:《学生双语报》 19
3. - I’m sorry. I ___at you the other day. - Forget it. I was a bit out of control myself.
A. shouldn’t shout B. shouldn’t have shouted C. mustn’t shout D. mustn’t have shouted
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3.Mustபைடு நூலகம்+have done 表示对过去发生的事情作出的肯定 判断 他们在玩篮球, 他们一定完成了作业。
They are playing basketball, they must have finished their homework. 路是湿的。昨天晚上一定下雨了。
The road is wet. It must have rained last night.
策划:《学生双语报》 9
㈡. can/could, may/might和must表推测:
1、must:“一定、肯定”只用于肯定,其结构如下:
must + 动词原形:对现在情况的推测; must + be doing:对进行动作的推测; must + have done:对过去情况的推测;
2、may/might:“也许、可能”用于肯定、否定,
策划:《学生双语报》
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情态动词考题: 1. ---Did the train arrive in time? ----No. It _______ two hours ago. B A. must have arrived B. ought to have arrived C. must arrive D. ought to arrive
2,must表推测只能用于肯定句。
如表示“一定不、肯定不”的意思时,应用can`t, He must know my address. 他肯定知道我的地址。(一定) He can`t know my address. 他肯定不知道我的地址。(一定不)
策划:《学生双语报》 3
(3)must表示推测时,可以推测现在/正在发生的动作/ 过去发生的动作。 He must have a car now. (must do)
策划:《学生双语报》
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情态动词+have done:表示对 过去发生的事进行推测
1. 2. 3. 4. 5. 6. 7. must have done might/may have done can’t/could’t have done could have done should have done Shouldn’t have done needn’t have done 一定做了… 可能做了… 不可能做了… 本可以做… 本该做
A. can; can’t; must B. can; can; must C. can; mustn’t; must D. must; mustn’t; can
策划:《学生双语报》
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6. –I saw Mary in the library yesterday. --You_____ her. She is still abroad. A. mustn’t see B. can’t have seen C. mustn’t have seen D. couldn’t see
Grammar ( 32ms )
modal verb
策划:《学生双语报》
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情态动词中的must, can, could, may, might都表推测。 其中must的可能性最大,can / could次之, may / might最小。 具体用法如下:
策划:《学生双语报》
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must 1.Must 表示推测时,语气肯定,较有把握. 这个电脑肯定出了问题。(there) There must be something wrong with the computer. 你努力学了一整天, 一定累了吧 You have worked hard all day,so you must be tired.
策划:《学生双语报》
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may/might
1.May/might表示推测时,表示把握不大。 她们明天可能会到这里来。 They may /might come here tomorrow. 2.may, might表推测时,可以用于肯定,否定句, 意思是“可能不、也许不” He may / might not be at home. 他也许不在家。
策划:《学生双语报》
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4. You ________ such a long composition. The C teacher only asked for 300 words. You have written 600. A. mustn’t have written B. couldn’t have written C. needn’t have written D. do not have to write
策划:《学生双语报》
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4. You __ the exam, but you spent all your time playing.
A. can pass B. could have passed C. could pass D. can have passed
策划:《学生双语报》
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4. ---There were already five people in the car, but they managed to take me as well. ----It ____a comfortable journey D A. can’t be C. mustn’t have been B. shouldn’t be D. couldn’t have been
他们一定不在图书馆读书。
(2) can/could可以推测现在的动作,正在发生的动 作或过去发生的动作。 They can’t know my address They can`t be reading in the library.
can’t + be doing:“不可能在做……”
策划:《学生双语报》 8
work by bus this morning.
迈克一定还没有找回他的车,因为早上他是坐
公共汽车来上班的。 策划:《学生双语报》
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4. –What____ it be? --It______ be a mail box, for it is moving. It______ be a car.