2022届高考英语二轮复习：情态动词讲义（含答案）
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2022年高考英语一轮复习情态动词
重难点知识讲解
1. 弄清基本语法特点
情态动词就是表示说话的语气或情态的动词。常见的情态动词有can, may, must, need, dare, shall, will, should, ought to, have to, used to, had better, would rather等。情态动词具有以下3个特点：
(1) 情态动词后面接动词原形并与动词原形一起构成谓语。
(2) 情态动词虽有时态的变化，但却没有人称和数的变化，即情态动词不会因为主语的人称或单复数的不同而用不同的形式。
(3) 变为疑问句或否定句时不需要助动词，而是将情态动词移至主语前变为疑问句，直接在情态动词后加not，构成否定句。
2. 弄清表示能力的can / could和be able to的用法
(1) can表示具有某种能力或技能，意为“能，会”。如：
Who can answer this question 谁能回答这个问题？
(2)can 的过去式为could，但它通常只表示过去一般性能力，不表示过去特定场合下的能力，遇此情况要用 was [were] able to。如：
I could run faster then. 我那时能跑得更快一些。
They were able to jump into the sea before the boat was blown up. 他们在船爆之前跳入海里。
3. 弄清表示许可的can / could / may / might / must的用法
can / could / may / might均可表示许可，只不过may较侧重讲话人的许可，而can较侧重客观情况的许可；could / might的语气比can / may更委婉、客气；在答语中表示允许别人做某事要can / may，不能用 could / might。如：
— Could [Can, May, Might] I use it 我可以借用它吗
— Yes, you can [may]. 可以。（不用 could / might）
must 表示必须作某事，其否定式mustn’t表示“不可以”。如：
We must not speak of it again. 我们再也不要谈这事了。
4. 弄清表推测的 can / may / could / might / should / must的用法
(1) 从所用句型来看：can用于否定句和疑问句，may用于肯定句和否定式，两者均可用于否定句，但是含义不同(cannot=不可能，may not=可能不)；could, might 和 should 可用于肯定句、否定句和疑问句；must 表示推测通常只用于肯定句。如：
She can’t be in the office now. 她现在不可能在办公室。
She may not be free tonight. 她今晚可能没空。
He may [might] come tonight. 他今晚可能会来。
Might he know this 他会知道这事吗
(2) 从语气上看，can / may / could / might 的语气较不确定，尤其是might, could，其意很不肯定；should表示推测时，其语气比较肯定，它通常指非常可能的事，并暗示其推测有一定的事实依据或者合乎常理；must 表示推测的语气最肯定。注意有时高考也会对这种语气上的差异命题，如下面这道高考题：
“When can I come for the photos I need them tomorrow afternoon.” “They _________ be ready by 12:00.”
A. can B. should C. might D. need
在四个选项中，首先可排除A和D，因为它们通常不用肯定句中；而B和C均可用于肯定句表示推测，但根据句意：顾客下午要照片，此时店主显然应用语气较肯定的should，而不宜用语气很不肯定的 might，否则顾客是不会满意的。
5. 弄清shall 与 will 的用法
(1) shall 除用于第一人称表示单纯将来外，还可用于陈述句第二、三人称, 表示说话者的意图、警告、命令、决心等。如：
You shall have an answer by tomorrow. 到明天你可以得到答复。
He shall have a bicycle for his birthday. 他可以得到一辆自行车作为生日礼物。
(2) will 可以表示习惯和倾向性，意为“惯于, 老是, 终归是”如：
The door won’t open. 这门打不开。
Matches will not strike if they are damp. 火柴潮湿就擦不着。
(3) Shall I (we)… 可用于征求意见等，Will you… 可用于表示请求或邀请等。如：
Shall I turn on the light 要不要把灯打开
Will you join us for dinner 你可否和我们一道去吃晚饭
6. 弄清must表示“偏偏”的用法
情态动词 must 有时可以表示固执、偏激或碰巧，通常可译为“偏偏”。如：
After I gave her my advice, she must go and do the opposite. 在我给她出主意之后她偏反着干。
The car must break down just we were starting our holidays. 我们刚刚开始休假，汽车偏偏坏了。
7. need和dare的用法要点
need和dare可用作实义动词和情态动词，用作实义动词时，后接动词要用不定式，有人称和数的变化，可用肯定句、否定句和疑问句；用作情态动词时，主要用于否定句和疑问句中，没有人称和数的变化，后接动词要用动词原形。如：
You need not pay—it is free. 你不必付钱，这是免费的。
We need to have lots of patience. 我们需要有很大的耐心。
Who would dare to tell him 谁会敢告诉他
He dared not go there at night. 晚上他不敢到那里去。
How dare you ask me such a question 你怎么敢问我这样的问题
注：need 表示“需要”，其后可接动名词，且要用主动形式表示被动意义。如：
The room needs cleaning. 这房间需要打扫了。
8. 弄清“情态动词+完成式”的用法
(1) must + have done：用于肯定句，表示推测，意为“一定(已经)……”。
(2) can + have done：用于否定句或疑问句，表示推测，意为“可能(已经)……”。
(3) could + have done：可用于肯定句、否定句或疑问句，表示推测、责备或遗憾等，意为“可能……”“本来可以……”“本来应该……”等。
(4) should [ought to] + have done：可用于肯定句、否定句或疑问句，表示责备或遗憾等，意为“本来应该……”。
(5) need + have done：用于否定句或疑问句，用于否定时意为“本来不必”，用于疑问句时意为“有必要……吗”。
(6) may + have done：用于肯定句或否定句，表示推测，意为“可能(已经)……”。
(7) might + have done：用于肯定句或否定句，表示推测，意为“可能(已经)……(此时 might 可换为 may)；另外还可以表示过去可能发生的事结果未发生，意为“本来会……”(此时 might 不能换为 may)。
He can’t have left so soon. 他不可能走得这么早。
I should have thought of it. 我本应想到这一点的。
You needn’t have mentioned it. 你没有必要提及此事的。
You must have mistaken my intention. 你一定是误会了我的意图。
I might have come to a wrong conclusion. 我或许得出了错误的结论。
You could have helped me—why did you just sit and watch 你本可帮助我的，为什么只坐在一旁瞧着
9. 弄清“情态动词+进行式”的用法
这类结构主要用于对一个正在进行的动作进行推测、责备、描述等。如：
He might be waiting for you. 他可能在等你(www.)。
You should be wearing your sunglasses. 你应当戴着你的太阳镜。
He must be joking, or else he’s mad. 他一定在说笑话，要不就是疯了。
10. 弄清may [might] as well和may [might] well的用法
(1) may [might] as well可用来提出建议等，可译为“不妨”(用might时口气更委婉一些)。如：
Catherine, you may as well come too. 凯瑟琳，你不妨也去。
If that’s the case, I may as well try. 如果情况如此，我不妨试一试。
(2) may [might] well可表示比较有把握的推测，意为“很可能”。如：
You might well be right. 你很可能是对的。
情态动词
题一：
No reader ____ take a book out of the library without the permission of the librarian.
A. might B. must
C. shall D. could
功能：表请求，允许，拒绝，禁止
can , could, may, might, shall, will, would…
否定回答时常用can’t 或mustn’t
shall 用于二、三人称，表示说话人给对方的命令、警告、允诺或威胁。
题二：
The fire spread through the hotel very quickly but everyone ____ get out.
A. had to B. would
C. could D. was able to
功能：表能力
can, could （区别在时态，可自否自疑）
当表示“过去经过努力且做成了某事”时常用be able to。
题三：
—Daddy, how much do you earn each hour
—If you ______ know, $20 an hour.
A. may B. must
C. can D. should
功能：表必要性
must, need, should/ought to, have to…[]
must的否定形式为needn’t
need（情态）+do
need（实意）+ to do
题四：
Our house is on the top of the hill, and in winter the winds ________ be very cold.
A. can B. need
C. would D. shall []
Judging from his worried face, we knew that he ______ have had some trouble.
A. would B. will
C. need D. must
Ella _____ at the car crash scene in New York last Sunday; she was travelling with me in
Hawaii then.
A. shouldn’t have appeared B. couldn’t have appeared
C. wouldn’t have appeared D. might not have appeared
功能：表示推测
must, can/could, may/might, should …
时态：情态动词+V原
情态动词+be+Ving
情态动词+have+done
题五：
—I am worn out now. I stayed up last night to finish the report.
—Oh You ______. The professor asked us to hand it in next week. []
A. needn’t have B. wouldn’t have
C. couldn’t have D. can’t have
情态动词+ have done 对过去事情的推测或虚拟
推过去：
must/can’t/could/may/might +have done
虚过去：
should / could/ might/would/need+ have done
本……而……
[]
题六：
After that, things were not better. Steve still 45 do his homework. Even as the 46 (punishment) became more severe, he remained stubborn.… …
45. A. wouldn’t B. couldn’t
C. needn’t D. shouldn’t
Each of us 53 (holds) a unique place in the world. You are special, no matter what others
say or what you may think. So 54 (forget) about being replaced. You 55 be.
55. A. mustn’t B. shouldn’t
C. can’t D. needn’t
[]
情态动词
讲义参考答案
题一：C 题二：D 题三：B 题四：ADB 题五：A 题六：AC
情态动词 课后练习
You ______ not get my support if you do such a thing.
A. might B. must
C. shall D. could
The school rules state that no child _____ be allowed out of the school unless accompanied by an adult.
A. could B. shall
C. must D. need
[]
Although badly hurt in the accident, the driver ______ make a phone call.
A. can B. could C. was able to D. were able to
He _______ flee to Europe before the war broke out.
A. can B. could C. was able to D. were able to
---______ we wait here
---No, you needn’t.
A. Must B. Can
C. May D. Should
If you ____ go, at least wait till the rain stops.
A. must B. can
C. may D. need
You haven’t eaten anything since this morning; you _____ be hungry.
A. can B. need C. must D. might
That _____ be Mary---she’s in hospital.
A. shouldn’t B. can’t C. mustn’t D. needn’t
My book has disappeared. Who _______ it
A. could have taken B. would have taken
C. should have taken D. must have taken
--- Hi, Tom. Where is Jane
---She ______ be in the classroom. I saw her there just now.
A. can B. need C. must D. might
---I hear they went skiing in the mountains last winter.
--- It _____ be true because there was little snow there.
A. shouldn’t B. can’t C. mustn’t D. needn’t
The road is wet. It ______ last night.
A. must rain B. must have rained
C. could have rained D. can have rained
[]
There was plenty of time, so she _____.
A. mustn’t have hurried B. needn’t hurry
C. mustn’t hurry D. needn’t have hurried
Mark have hurried. After driving at top speed, he arrived half an hour early.
A. needn’t B. wouldn’t
C. mustn’t D. couldn’t
At first I thought it was a crazy 39 because I didn’t have a good sense of balance, nor did I have the 40 to keep pace with the others on the team and they would tease me. But for the teacher who kept insisting on my “going for it”, I ___41___ have decided to give a try.
41. A. can’t B. wouldn’t
C. needn’t D. mustn’t
I could ___47____ the drum beats and bass notes in my stomach. I __48____ recall any of the songs that the band played. I just remember that I really enjoyed the show and didn’t want it to _ 49_.
48. A. can’t B. shouldn’t
C. needn’t D. mustn’t
[]
When I came to the biggest computer, I saw a thin, small man 50 in front of it. “I’m Steve”, he finally answered after I asked him a couple of times what his name was. “I 51 talk with you. I’m busy”, he said. He was chatting online with somebody - probably someone he didn’t know - and, at the same time, he was playing a computer game - a war game.[]
51. A. mustn’t B. can’t
C. needn’t D. couldn’t
59 , I realized that the people there were having a nice conversation with their machines, not with people. They were more 60 having a relationship with the 61 , particularly Steve. I 62 want to imagine the future of human beings if they preferred sharing their lives with machines 63 with people.
62. A. shouldn’t B. needn’t
C. mustn’t D. wouldn’t
情态动词
课后练习参考答案
C
解析：句意：假如你做那种事，我就不支持你。shall表示命令、许诺、警告、强制、威胁、决心等，用于第二、三人称中。
B
解析：句意：学校制度规定，除非有家长陪伴，任何孩子不准离开学校。shall表示命令、许诺、警告、强制、威胁、决心等，用于第二、三人称中。
C
解析：句意：尽管在事故中受伤严重，但是这个司机还是打了一个电话。can或者could表示能力，此处强调结果，即过去某一次成功地做了某事，要用be able to，主语the driver是单数，所以要用was able to。
C
解析：句意：在战争爆发之前他逃到了欧洲。can或者could表示能力，此处强调结果，即过去某一次成功地做了某事，要用be able to，主语he是单数，所以要用was able to。
A
解析：句意：我们必须在这儿等着吗？不，你们不必。此处must表示必要性，否定形式为needn’t。
A
解析：句意：如果你一定要走，至少也要等雨停了再走。此处must表示必要性，意思是“一定要，必须”。
CBA
解析：
1.句意：从早上起你就一直没有吃东西，你一定饿了。情态动词must在这里表推测。
2.句意：那不可能是玛丽。她在住院。表示“有把握的推测”时，否定句用can’t 。
3.句意：我的书不见了。谁可能带走它？could have done在这里表推测。
CBB
解析：
1.根据“她一定在教室，我刚才看见她了”可知表示“有把握的推测”，用must。
2.根据“不可能是真的因为那儿没雪”可知表示“有把握的推测”，否定句用can’t 。
3.根据“路面湿了”可知表示“有把握的推测”，所以用must have done.
D
解析：句意：时间很充足，因此她没有必要那么匆忙。needn’t have done本来没有必要做某事。
A
解析：句意：Mark本来没有必要那么匆忙，他以高速提前半小时到达。needn’t have done本来没有必要做某事。
BA
解析：
41. 所在句子意思是：要不是老师持续让我尝试，我是不会决定试一试的。可知是对于过去的虚拟，主句中要用would have done的结构。
48. 指的是我现在不能回忆起任何乐队所演奏的任何歌曲。所以要用can’t。
BD[]
解析：
51. 因为我很忙，所以我不能和你谈话。所以要用can’t。
62. 我不愿意想象那会是一个怎样的世界，如果人们更喜欢和机器交往，而不是和人。此处wouldn’t是不愿意的意思。
重难点知识讲解
1. 弄清基本语法特点
情态动词就是表示说话的语气或情态的动词。常见的情态动词有can, may, must, need, dare, shall, will, should, ought to, have to, used to, had better, would rather等。情态动词具有以下3个特点：
(1) 情态动词后面接动词原形并与动词原形一起构成谓语。
(2) 情态动词虽有时态的变化，但却没有人称和数的变化，即情态动词不会因为主语的人称或单复数的不同而用不同的形式。
(3) 变为疑问句或否定句时不需要助动词，而是将情态动词移至主语前变为疑问句，直接在情态动词后加not，构成否定句。
2. 弄清表示能力的can / could和be able to的用法
(1) can表示具有某种能力或技能，意为“能，会”。如：
Who can answer this question 谁能回答这个问题？
(2)can 的过去式为could，但它通常只表示过去一般性能力，不表示过去特定场合下的能力，遇此情况要用 was [were] able to。如：
I could run faster then. 我那时能跑得更快一些。
They were able to jump into the sea before the boat was blown up. 他们在船爆之前跳入海里。
3. 弄清表示许可的can / could / may / might / must的用法
can / could / may / might均可表示许可，只不过may较侧重讲话人的许可，而can较侧重客观情况的许可；could / might的语气比can / may更委婉、客气；在答语中表示允许别人做某事要can / may，不能用 could / might。如：
— Could [Can, May, Might] I use it 我可以借用它吗
— Yes, you can [may]. 可以。（不用 could / might）
must 表示必须作某事，其否定式mustn’t表示“不可以”。如：
We must not speak of it again. 我们再也不要谈这事了。
4. 弄清表推测的 can / may / could / might / should / must的用法
(1) 从所用句型来看：can用于否定句和疑问句，may用于肯定句和否定式，两者均可用于否定句，但是含义不同(cannot=不可能，may not=可能不)；could, might 和 should 可用于肯定句、否定句和疑问句；must 表示推测通常只用于肯定句。如：
She can’t be in the office now. 她现在不可能在办公室。
She may not be free tonight. 她今晚可能没空。
He may [might] come tonight. 他今晚可能会来。
Might he know this 他会知道这事吗
(2) 从语气上看，can / may / could / might 的语气较不确定，尤其是might, could，其意很不肯定；should表示推测时，其语气比较肯定，它通常指非常可能的事，并暗示其推测有一定的事实依据或者合乎常理；must 表示推测的语气最肯定。注意有时高考也会对这种语气上的差异命题，如下面这道高考题：
“When can I come for the photos I need them tomorrow afternoon.” “They _________ be ready by 12:00.”
A. can B. should C. might D. need
在四个选项中，首先可排除A和D，因为它们通常不用肯定句中；而B和C均可用于肯定句表示推测，但根据句意：顾客下午要照片，此时店主显然应用语气较肯定的should，而不宜用语气很不肯定的 might，否则顾客是不会满意的。
5. 弄清shall 与 will 的用法
(1) shall 除用于第一人称表示单纯将来外，还可用于陈述句第二、三人称, 表示说话者的意图、警告、命令、决心等。如：
You shall have an answer by tomorrow. 到明天你可以得到答复。
He shall have a bicycle for his birthday. 他可以得到一辆自行车作为生日礼物。
(2) will 可以表示习惯和倾向性，意为“惯于, 老是, 终归是”如：
The door won’t open. 这门打不开。
Matches will not strike if they are damp. 火柴潮湿就擦不着。
(3) Shall I (we)… 可用于征求意见等，Will you… 可用于表示请求或邀请等。如：
Shall I turn on the light 要不要把灯打开
Will you join us for dinner 你可否和我们一道去吃晚饭
6. 弄清must表示“偏偏”的用法
情态动词 must 有时可以表示固执、偏激或碰巧，通常可译为“偏偏”。如：
After I gave her my advice, she must go and do the opposite. 在我给她出主意之后她偏反着干。
The car must break down just we were starting our holidays. 我们刚刚开始休假，汽车偏偏坏了。
7. need和dare的用法要点
need和dare可用作实义动词和情态动词，用作实义动词时，后接动词要用不定式，有人称和数的变化，可用肯定句、否定句和疑问句；用作情态动词时，主要用于否定句和疑问句中，没有人称和数的变化，后接动词要用动词原形。如：
You need not pay—it is free. 你不必付钱，这是免费的。
We need to have lots of patience. 我们需要有很大的耐心。
Who would dare to tell him 谁会敢告诉他
He dared not go there at night. 晚上他不敢到那里去。
How dare you ask me such a question 你怎么敢问我这样的问题
注：need 表示“需要”，其后可接动名词，且要用主动形式表示被动意义。如：
The room needs cleaning. 这房间需要打扫了。
8. 弄清“情态动词+完成式”的用法
(1) must + have done：用于肯定句，表示推测，意为“一定(已经)……”。
(2) can + have done：用于否定句或疑问句，表示推测，意为“可能(已经)……”。
(3) could + have done：可用于肯定句、否定句或疑问句，表示推测、责备或遗憾等，意为“可能……”“本来可以……”“本来应该……”等。
(4) should [ought to] + have done：可用于肯定句、否定句或疑问句，表示责备或遗憾等，意为“本来应该……”。
(5) need + have done：用于否定句或疑问句，用于否定时意为“本来不必”，用于疑问句时意为“有必要……吗”。
(6) may + have done：用于肯定句或否定句，表示推测，意为“可能(已经)……”。
(7) might + have done：用于肯定句或否定句，表示推测，意为“可能(已经)……(此时 might 可换为 may)；另外还可以表示过去可能发生的事结果未发生，意为“本来会……”(此时 might 不能换为 may)。
He can’t have left so soon. 他不可能走得这么早。
I should have thought of it. 我本应想到这一点的。
You needn’t have mentioned it. 你没有必要提及此事的。
You must have mistaken my intention. 你一定是误会了我的意图。
I might have come to a wrong conclusion. 我或许得出了错误的结论。
You could have helped me—why did you just sit and watch 你本可帮助我的，为什么只坐在一旁瞧着
9. 弄清“情态动词+进行式”的用法
这类结构主要用于对一个正在进行的动作进行推测、责备、描述等。如：
He might be waiting for you. 他可能在等你(www.)。
You should be wearing your sunglasses. 你应当戴着你的太阳镜。
He must be joking, or else he’s mad. 他一定在说笑话，要不就是疯了。
10. 弄清may [might] as well和may [might] well的用法
(1) may [might] as well可用来提出建议等，可译为“不妨”(用might时口气更委婉一些)。如：
Catherine, you may as well come too. 凯瑟琳，你不妨也去。
If that’s the case, I may as well try. 如果情况如此，我不妨试一试。
(2) may [might] well可表示比较有把握的推测，意为“很可能”。如：
You might well be right. 你很可能是对的。
情态动词
题一：
No reader ____ take a book out of the library without the permission of the librarian.
A. might B. must
C. shall D. could
功能：表请求，允许，拒绝，禁止
can , could, may, might, shall, will, would…
否定回答时常用can’t 或mustn’t
shall 用于二、三人称，表示说话人给对方的命令、警告、允诺或威胁。
题二：
The fire spread through the hotel very quickly but everyone ____ get out.
A. had to B. would
C. could D. was able to
功能：表能力
can, could （区别在时态，可自否自疑）
当表示“过去经过努力且做成了某事”时常用be able to。
题三：
—Daddy, how much do you earn each hour
—If you ______ know, $20 an hour.
A. may B. must
C. can D. should
功能：表必要性
must, need, should/ought to, have to…[]
must的否定形式为needn’t
need（情态）+do
need（实意）+ to do
题四：
Our house is on the top of the hill, and in winter the winds ________ be very cold.
A. can B. need
C. would D. shall []
Judging from his worried face, we knew that he ______ have had some trouble.
A. would B. will
C. need D. must
Ella _____ at the car crash scene in New York last Sunday; she was travelling with me in
Hawaii then.
A. shouldn’t have appeared B. couldn’t have appeared
C. wouldn’t have appeared D. might not have appeared
功能：表示推测
must, can/could, may/might, should …
时态：情态动词+V原
情态动词+be+Ving
情态动词+have+done
题五：
—I am worn out now. I stayed up last night to finish the report.
—Oh You ______. The professor asked us to hand it in next week. []
A. needn’t have B. wouldn’t have
C. couldn’t have D. can’t have
情态动词+ have done 对过去事情的推测或虚拟
推过去：
must/can’t/could/may/might +have done
虚过去：
should / could/ might/would/need+ have done
本……而……
[]
题六：
After that, things were not better. Steve still 45 do his homework. Even as the 46 (punishment) became more severe, he remained stubborn.… …
45. A. wouldn’t B. couldn’t
C. needn’t D. shouldn’t
Each of us 53 (holds) a unique place in the world. You are special, no matter what others
say or what you may think. So 54 (forget) about being replaced. You 55 be.
55. A. mustn’t B. shouldn’t
C. can’t D. needn’t
[]
情态动词
讲义参考答案
题一：C 题二：D 题三：B 题四：ADB 题五：A 题六：AC
情态动词 课后练习
You ______ not get my support if you do such a thing.
A. might B. must
C. shall D. could
The school rules state that no child _____ be allowed out of the school unless accompanied by an adult.
A. could B. shall
C. must D. need
[]
Although badly hurt in the accident, the driver ______ make a phone call.
A. can B. could C. was able to D. were able to
He _______ flee to Europe before the war broke out.
A. can B. could C. was able to D. were able to
---______ we wait here
---No, you needn’t.
A. Must B. Can
C. May D. Should
If you ____ go, at least wait till the rain stops.
A. must B. can
C. may D. need
You haven’t eaten anything since this morning; you _____ be hungry.
A. can B. need C. must D. might
That _____ be Mary---she’s in hospital.
A. shouldn’t B. can’t C. mustn’t D. needn’t
My book has disappeared. Who _______ it
A. could have taken B. would have taken
C. should have taken D. must have taken
--- Hi, Tom. Where is Jane
---She ______ be in the classroom. I saw her there just now.
A. can B. need C. must D. might
---I hear they went skiing in the mountains last winter.
--- It _____ be true because there was little snow there.
A. shouldn’t B. can’t C. mustn’t D. needn’t
The road is wet. It ______ last night.
A. must rain B. must have rained
C. could have rained D. can have rained
[]
There was plenty of time, so she _____.
A. mustn’t have hurried B. needn’t hurry
C. mustn’t hurry D. needn’t have hurried
Mark have hurried. After driving at top speed, he arrived half an hour early.
A. needn’t B. wouldn’t
C. mustn’t D. couldn’t
At first I thought it was a crazy 39 because I didn’t have a good sense of balance, nor did I have the 40 to keep pace with the others on the team and they would tease me. But for the teacher who kept insisting on my “going for it”, I ___41___ have decided to give a try.
41. A. can’t B. wouldn’t
C. needn’t D. mustn’t
I could ___47____ the drum beats and bass notes in my stomach. I __48____ recall any of the songs that the band played. I just remember that I really enjoyed the show and didn’t want it to _ 49_.
48. A. can’t B. shouldn’t
C. needn’t D. mustn’t
[]
When I came to the biggest computer, I saw a thin, small man 50 in front of it. “I’m Steve”, he finally answered after I asked him a couple of times what his name was. “I 51 talk with you. I’m busy”, he said. He was chatting online with somebody - probably someone he didn’t know - and, at the same time, he was playing a computer game - a war game.[]
51. A. mustn’t B. can’t
C. needn’t D. couldn’t
59 , I realized that the people there were having a nice conversation with their machines, not with people. They were more 60 having a relationship with the 61 , particularly Steve. I 62 want to imagine the future of human beings if they preferred sharing their lives with machines 63 with people.
62. A. shouldn’t B. needn’t
C. mustn’t D. wouldn’t
情态动词
课后练习参考答案
C
解析：句意：假如你做那种事，我就不支持你。shall表示命令、许诺、警告、强制、威胁、决心等，用于第二、三人称中。
B
解析：句意：学校制度规定，除非有家长陪伴，任何孩子不准离开学校。shall表示命令、许诺、警告、强制、威胁、决心等，用于第二、三人称中。
C
解析：句意：尽管在事故中受伤严重，但是这个司机还是打了一个电话。can或者could表示能力，此处强调结果，即过去某一次成功地做了某事，要用be able to，主语the driver是单数，所以要用was able to。
C
解析：句意：在战争爆发之前他逃到了欧洲。can或者could表示能力，此处强调结果，即过去某一次成功地做了某事，要用be able to，主语he是单数，所以要用was able to。
A
解析：句意：我们必须在这儿等着吗？不，你们不必。此处must表示必要性，否定形式为needn’t。
A
解析：句意：如果你一定要走，至少也要等雨停了再走。此处must表示必要性，意思是“一定要，必须”。
CBA
解析：
1.句意：从早上起你就一直没有吃东西，你一定饿了。情态动词must在这里表推测。
2.句意：那不可能是玛丽。她在住院。表示“有把握的推测”时，否定句用can’t 。
3.句意：我的书不见了。谁可能带走它？could have done在这里表推测。
CBB
解析：
1.根据“她一定在教室，我刚才看见她了”可知表示“有把握的推测”，用must。
2.根据“不可能是真的因为那儿没雪”可知表示“有把握的推测”，否定句用can’t 。
3.根据“路面湿了”可知表示“有把握的推测”，所以用must have done.
D
解析：句意：时间很充足，因此她没有必要那么匆忙。needn’t have done本来没有必要做某事。
A
解析：句意：Mark本来没有必要那么匆忙，他以高速提前半小时到达。needn’t have done本来没有必要做某事。
BA
解析：
41. 所在句子意思是：要不是老师持续让我尝试，我是不会决定试一试的。可知是对于过去的虚拟，主句中要用would have done的结构。
48. 指的是我现在不能回忆起任何乐队所演奏的任何歌曲。所以要用can’t。
BD[]
解析：
51. 因为我很忙，所以我不能和你谈话。所以要用can’t。
62. 我不愿意想象那会是一个怎样的世界，如果人们更喜欢和机器交往，而不是和人。此处wouldn’t是不愿意的意思。