Must 的用法:
1. must (“必须”, 主观上的) / have to (“不得不”, 客观上的)
2. must / need 提问, 其肯定答语用must , 否定答语用needn’t
3. mustn’t 表示禁止
4. 用于猜测句型, 表语气很强的肯定句中. “一定….”
5. 表示人的一种固执“偏要”“非…不可” (指做令人不愉快的事)
6. 做名词: “必须有的东西/做的事”
Exercises:
1. I can’t find my key. It ____ in my offi ce.
A. can be forgotten
B. can be left
C. must have been forgotten
D. must have been left
2.---What’s that terrible smell?
---Oh, I forgot about the chicken! Go and look, it ______!
A. may be burnt
B. ought to be boiling
C. can be cooking
D. must be burning
3. “Oh, peter, you are running a high fever. You ____ go to see a doctor or you’ll miss the entrance exam.” Said the teacher.
A. must
B. should
C. might C. could
4.---_____ you make so much noise?
---Sorry. I’ll take care n ot to.
A. Can
B. Must
C. May
D. Would
5.I really _____ go ; I shall miss my bus if I don’t hurry.
A. can
B. might
C. will
D. must
6. You _____ use the office phone for private calls during working time. It’s not permitted.
A. need n’t
B. mustn’t
C. may not
D. won’t
7.---Wake up, Peter. Time to rise.
---I ____ asleep while I was reading
A. must fall
B. could fall
C. must have fallen
D. should have fallen
8.---_____ I book a table for dinner a few days ahead of time?
---Yes, you ____. The restaurant is always full, especially during the holidays.
A. Must, will
B. Must, can
C. Shall, shall
D. Shall, must
9.Little Tom ____ have finished his homework; otherwise, he wouldn’t be listening to music.
A. can
B. shall
C. must
D. would
10.Apologize? ______ I ? It was all her own fault.
A. May
B. Shall
C. Should
D. Must
11.So long as there are more people than needed, there _____ be tests to help make a fairer decision.
A. can
B. may
C. shall
D. must
12.____ you take a taxi? There is still plenty of time.
A. Can
B. Will
C. Must
D. Should
13.---Tom is never late for work. Why is he absent today?
---Something ____ to him.
A. must happen
B. should have happened
C. could have happened
D. must have happened
14.The examination _____ very difficult since only a few of the students passed.
A. could have been
B. must have been
C. might have been
D. would have been
15.---I phoned Tom yesterday evening , but nobody answered the phone.
---Oh, he _____ .
A. must be sleeping
B. must slept
C. must have been sleeping
D. could be sleeping
16.Don’t interrupt me, John. ____ you force me to tell you the truth at the moment?
A. Might
B. Must
C. Should
D. Will
17.All my family are looking forward to meeting you. You ____ come over and have dinner with us this weekend.
A. will
B. must
C. may
D. shall
18.---Can I surf the Internet tonight?
---Sure. However, in no case _____ you do it alone.
A. could
B. might
C. must
D. need
Answers: 1-5 DDABD 6-10 BCDCD 11-15 DCDBC 16-20 BBC
一?用作实义动词 1. need sth. 这是need最常见的用法之一，其后的宾语可以是名词，也可以是代词。如： 1) . The soup n eed salt. 2) . They don nbed afraid any more. 3) . Does he n eed any help? 通常物做主语，n eed后面可跟动名词作宾语，这种情况下应注意两点： ① .主动形式的动名词doing具有被动的含义； ② .该动名词可以改为其动词不定式的被动形式而句子的意义不变。例如： 4) . The door n eeds painting. =The door n eeds to be pain ted. 5) . Your car n eeds repairi ng. =Your car n eeds to be repaired. 3. need to do sth. 作为实义动词，need后面需要接带to的动词不定式，表示有义务或责任去做某事。如： 6) . What do we n eed to take for the party? 7) . Will we n eed to show our ID card? 8) . I n eed to take good care of my sister. ①.没有人称和数的变化。不论主语是第几人称，不论主语是单数还是复数，情态都词都无形式变化； ②.不能单独充当谓语。情态动词必须与一个实义动词一起构成复合谓语，并且这个实意动词要始终是动词原形。 ③.变为否定句时只需在情态动词之后加n ot。 9) . You needn't do it again 10) . He needn't worry about it . ④.变为疑问句时只需将情态动词提到主语的前面。例如： 11) . Need I type this letter aga in? 12) —Need I stay here any Ion ger? —No, you needn ' t. —Yes, you must. 三.用作名词 need作为名词，含义为缺乏，需要”其复数表示基本需要”要掌握两个词组：in (great) need of (急需) 与meet the needs o满足 ........ 的需要)。例如： 13) . There ' s no need for you to try again. 14) . The factory is in great n eed of fun ds. "need+have+done ”表示本来需要做某事而没有做。“ needn't+have+done ”则表示"本来不需要做某事而做了" 。 I n eed n't have bought so much wine —only five people came. He n eed have hurried to the statio n. In that case, be would n't have missed the trai n. you n eed not have said that “ should+have+done "意思是"本来应该做某事，而实际没做。”“ shouldn't+have+done "表示本来不应该做某事，而 实际做了。含有指责对方或自责的含意。 1. Tom, you are too lazy. The work should have been finished yesterday. 2. Look, Tom is cryin g. I should n't have bee n so harsh on him. 3 you should have told me “ must+have+done "表示对过去事情的肯定推测，译成"一定做过某事"，该结构只用于肯定句。 1. It must have rained last ni ght, for the grou nd is wet. 2. You must have bee n mad to speak to the serva nt.
情态动词must用法详解 (1) 表示“必须” 此时可用于肯定句、否定句或疑问句，用于否定句时，mustn’t的意思是“一定不要”“不能”，而不表示“不必”。如： Water must be pure if it is to be drunk. 水如供饮用必须净化。 Must I finish the work tonight? 我必须今晚完成这项工作吗? Adverbs mustn’t be put between the verb and the object. 副词不能放在动词和宾语之间。 must主要表示现在或将来，但在间接引语中也可表过去(=had to)。如： She asked her boss if she must (had to) work overtime. 她请示上司她是否要加班。 对于must开头的一般疑问句，若作否定回答，可以用needn’t，不能用mustn’t。如：“Must I clean all the rooms?” “No, you needn’t.” “这些房间我都得清扫吗?”“不必。” (2) 表示推测 意为“准是”“一定是”，通常只用于肯定句。若用于否定句或疑问句，则用can 代之。如： That can’t be the only way. There must be other ways of solving the problem. 那不可能是解决问题的唯一办法，肯定有另外的办法。 Jane’s light is on. She must be at home. She can’t be out. 简的房间里开着灯。她一定在家，不会出去的。 若要谈论过去或完成的情况，必须用“must+have+过去分词”。如： You must have mistaken my intention. 你一定是误会了我的意图。 She must have been very young when she got married. 她结婚时一定很年轻。 He must have come this way; here are his footprints. 他一定是走这条路来的，这里还有他的脚印呢。 They must have finished their homework, for they are playing happily on the playground. 他们一定是写完作业了，他们在操场上玩得多开心呢。 (3) 表示“偏偏” 有时must可表示某事发生得不早不迟，就在某个当紧的时候，多指某些不受欢迎的事情的发生。如： 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。 Must you worry her with questions, just when she is busy cooking dinner? 她正忙着做饭你干吗偏偏问她问题? Just when I was busy, the neighbor must come and chatter. 正当我忙碌的时候，邻居偏偏过来聊天。 有时还可指主观上的偏执或固执，常可译为“偏”“偏要”。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要反着干。 Must you make so much noise? 你就非得弄出这么大的声音吗？ (4) must 与have to 的区别 两者都表示“必须”，但must 侧重于说话者的主观看法，认为有必要或有义务去做某事；have to 则重于客观需要，含有“不得不”“被迫”之意。如： Everyone must keep the law. 人人都要守法。 The last train has gone. We’ll have to walk home. 最后一班车已经开了，我们得走回家了。
一．用作实义动词 1．need sth. 这是need最常见的用法之一，其后的宾语可以是名词，也可以是代词。如： 1). The soup need s salt. 2). They don’t need afraid any more. 3). Does he need any help? 2．need doing 与need to be done 通常物做主语，need后面可跟动名词作宾语，这种情况下应注意两点： ①.主动形式的动名词doing具有被动的含义； ②.该动名词可以改为其动词不定式的被动形式而句子的意义不变。例如： 4). The door needs painting. = The door needs to be painted. 5). Your car needs repairing. = Your car needs to be repaired. 3．need to do sth. 作为实义动词，need后面需要接带to的动词不定式,表示有义务或责任去做某事。如： 6). What do we need to take for the party? 7). Will we need to show our ID card? 8). I need to take good care of my sister. 二．用作情态动词 ①．没有人称和数的变化。不论主语是第几人称，不论主语是单数还是复数，情态都词都无形式变化； ②．不能单独充当谓语。情态动词必须与一个实义动词一起构成复合谓语，并且这个实意动词要始终是动词原形。 ③．变为否定句时只需在情态动词之后加not。 9)．You needn't do it again． 10)．He needn't worry about it． ④．变为疑问句时只需将情态动词提到主语的前面。例如： 11). Need I type this letter again? 12）—Need I stay here any longer? —No, you needn’t. —Yes, you must. 三．用作名词 need作为名词，含义为“缺乏，需要”；其复数表示“基本需要”。要掌握两个词组：in (great) need of（急需）与meet the needs of(满足……的需要)。例如： 13). There’s no need for you to try again. 14). The factory is in great need of funds. “need+have+done”表示本来需要做某事而没有做。“needn't+have+done”则表示“本来不需要做某事而做了”。 I needn't have bought so much wine—only five people came. He need have hurried to the station. In that case, be wouldn't have missed the train. you need not have said that “should+have+done”意思是“本来应该做某事，而实际没做。”“shouldn't+have+done”表示本来不应该做某事，而实际做了。含有指责对方或自责的含意。 1. Tom, you are too lazy. The work should have been finished yesterday. 2. Look, Tom is crying. I shouldn't have been so harsh on him. 3 you should have told me “must+have+done”表示对过去事情的肯定推测，译成“一定做过某事”，该结构只用于肯定句。 1. It must have rained last night, for the ground is wet. 2. You must have been mad to speak to the servant.
must 的用法 一、表义务，“必须”。例如： You must talk to them about their study. 你必须同他们谈谈关于他们学习的事。 二、在否定结构中表不许。例如： You mustn't leave here. 你不能离开这儿。 三、表推测，暗含有很大的可能性。例如： He must be ill. He looks so pale. 他肯定是病了。他的脸色那么苍白。 注意：之前我们说过 may 也可以表猜测，但是 may 暗含的可能性较小，must 暗含的可能性较大。另外否定的猜测是用can't。例如： The baby can't be ill. He is so active. 那宝宝不大可能是病了。他那么活跃。 四、表不可避免，“必然要，必定会”。例如： All men must die. 人总有一死。 五、表主张，“坚持要，一定要”。例如： If you must go, at least wait till the rain stops. 如果你坚持要走，至少也要等雨停了再走。 六、关于 must 的简短回答： -Must I clean the dining room at once? 我必须马上打扫膳厅吗?
-Yes, you must. 是的。 -No, you needn't. / No, you don't have to. 不必马上打扫。 have to 的用法 一、have to 表客观的需要和义务，must 表主观的认识。例如： I missed the train, so I had to take a taxi. 我没搭上火车，所以我只得打的。(客观上需要打的) I must study hard. 我必须努力学习。(主观上认为应该努力学习) 二、在疑问句和否定句中，have to 多用助动词 do 构成，must 则直接提前或加not。例如： Did he have to do it? = Must he do it? 他得做那件事吗? 而且在否定句中，have to 表不需要，must 表不允许： You don't have to go there. 你不需要去那儿。 You mustn't go there? 你不可去那儿。 初一语法：连系动词及系表结构 连系动词也称系动词，它本身有词义，但不能单独用作谓语，后边必须跟表语共同构成复合谓语。 连系动词与其后的表语合起来叫作系表结构。系表结构说明主语的状况、性质、特征等情况。
初一英语：情态动词can-must-may的用法
————————————————————————————————作者：————————————————————————————————日期：
学员编号：年级：初一课时数及课时进度：学员姓名：辅导科目：英语学科教师： 学科组长/带头人签名及 日期 课题情态动词 授课时间：备课时间： 情态动词can，must，may的用法 教学目标 掌握三个情态动词的用法 重点、难点 掌握情态动词的用法并能灵活运用 考点及考试要求 教学内容 Step 1: homework checking and dictation Step 2: 情态动词 一、概念：情态动词是一种本身有一定的词义，表示说话人的情绪、态度或语气的动词，但不能单独作谓语，只能和其他动词原形构成复合谓语，没有人称和数的变化。 情态动词数量不多，但用途广泛，主要有：can (could), may (might), must, need, ought to, dare (dared), shall (should), will (would) . 二、can/could 1. 表示能力（如体力和脑力方面），意为“能、会” Can you speak Chinese? Can you play basketball? 2. 表示请求或者允许，多用在口语中，意为“可以、能”等客观条件的允许。用于疑问句中用来提出要求，用于否定句中表示不允许。 Can you help me? You can’t play the computer 3. 表示可能，理论上的可能。 He can be out now. It can’t bu sunny all the time.
need用法 一．用作实义动词 1．need sth. 这是need最常见的用法之一，其后的宾语可以是名词，也可以是代词。如： 1). The soup need s salt. 2). They don’t need afraid any more. 3). Does he need any help 2．need doing 与 need to be done 通常物做主语，need后面可跟动名词作宾语，这种情况下应注意两点： ①.主动形式的动名词doing具有被动的含义； ②.该动名词可以改为其动词不定式的被动形式而句子的意义不变。例如： 4). The door needs painting. = The door needs to be painted. 5). Your car needs repairing. = Your car needs to be repaired. 3．need to do sth. 作为实义动词，need后面需要接带to的动词不定式,表示有义务或责任去做某事。如： 6). What do we need to take for the party 7). Will we need to show our ID card 8). I need to take good care of my sister. 二．用作情态动词 ①．没有人称和数的变化。不论主语是第几人称，不论主语是单数还是复数，情态都词都无形式变化； ②．不能单独充当谓语。情态动词必须与一个实义动词一起构成复合谓语，并且这个实意动词要始终是动词原形。 ③．变为否定句时只需在情态动词之后加not。 9)．You needn't do it again． 10)．He needn't worry about it． ④．变为疑问句时只需将情态动词提到主语的前面。例如： 11). Need I type this letter again 12）—Need I stay here any longer —No, you needn’t. —Yes, you must. 三．用作名词 need作为名词，含义为“缺乏，需要”；其复数表示“基本需要”。要掌握两个词组：in (great) need of（急需）与meet the needs of(满足……的需要)。例如： 13). There’s no need for you to try again. 14). The factory is in great need of funds. “need+have+done”表示本来需要做某事而没有做。“needn't+have+done”则表示“本来不需要做某事而做了”。 I needn't have bought so much wine—only five people came. He need have hurried to the station. In that case, be wouldn't have missed the train. you need not have said that “should+have+done”意思是“本来应该做某事，而实际没做。” “shouldn't+have+done”表示本来不应该做某事，而实际做了。含有指责对方或自责的含意。 1. Tom, you are too lazy. The work should have been finished yesterday. 2. Look, Tom is crying. I shouldn't have been so harsh on him. 3 you should have told me “must+have+done”表示对过去事情的肯定推测，译成“一定做过某事”，该结构只用于肯定句。 1. It must have rained last night, for the ground is wet. 2. You must have been mad to speak to the servant.
must用法详解 今天给大家带来must用法详解，我们一起来学习吧，下面就和大家分享，来欣赏一下吧。 must用法详解 1. 表示“必须”、“一定要” (1) 可用于肯定句、否定句或疑问句;用于否定句时，mustn’t 的意思是“一定不要”、“不能”，而不是“不必”。如： You must finish it today. 你一定要在今天完成它。 You must see the doctor. 你一定要看医生。 Must you go so soon? 你一定得这么早就走吗? We mustn’t think only of ourselves. 我们可不能只考虑自己。 (2) 主要表示现在或将来，但有时(如在间接引语中)也可表过去(=had to)。如： She asked if she must (had to) leave. 她问她是否一定要离开。
(3) 对于must 开头一般疑问句，若要作否定回答，可用needn’t、dont have to，不用mustn’t。如： "Must I come over tonight?" "No, you needn’t." “我今晚必须 过来吗?”“不必。” (4) 其后可接被动结构或进行形式。如： Something must be done to stop it. 必须采取措施来阻止它。 I think I must be going. 我想我得走了。 2. 表示推测 意为“准是”、“一定是”，注意以下几点。如： (1) 通常只用于肯定句，在否定句或疑问句用can 代之。如： It must be true. 那一定是真的。 比较。如：Can it be true? 那可能是真的吗? / It can’t be true. 那不可能是真的。 (2) 后接动词原形，表示对现在情况的推测。如： He must be wrong. 他一定错了。 The man must have a lot of money. 这个人一定有不少钱。
情态动词can，must的用法:1. 不随着主语变化而变化；2.后跟动词原形； 1.Can 表示能，会。 1.不随着主语变化而变化； 后跟动词原形； 否定形式can not= can’t不能，不会 提can到句首，句末加“”，其肯否定回答：Yes，** can. No, ** can’t. Must，必须; 不随着主语变化而变化； 后跟动词原形； 否定形式must not = mustn’t 不允许，不准，禁止 提must到句首，句末加“”，其肯否定回答：Yes，** must. No, ** needn’t. （不，**不必）
练习题： 一．翻译 我能从墙上跳下来。 Sue 会骑自行车。 Sandy 和Sue 能打印这份信。 他们能看见那只鸟。 我必须回家。 Emma必须写作业。 我们必须从墙上跳下来。 他们必须写字。 不允许他们在街上玩。 禁止他们玩火。 二．改写句型。 1. I can sing. 改否定句: _____________ 改一般疑问句：________________ 作肯否定回答：______________________________ 划提：_____________________________ can ride a bike. 改否定句: ______________________
改一般疑问句：_____________________作肯否定回答：____________________ 划提：_____________________________ and Billy must do their homework. 改否定句: ______________________ 改一般疑问句：_____________________作肯否定回答：__________________ 划提：_____________________________ must stay at home. 改否定句: ______________________ 改一般疑问句：_____________________作肯否定回答：__________________ 划提：_____________________________ Sophie must read a novel. 改否定句: ______________________ 改一般疑问句：_____________________作肯否定回答：__________________ 划提：_____________________________ He can see that nest. 改否定句: ______________________ 改一般疑问句：_____________________作肯否定回答：__________________ 划提：_____________________________ They must listen to the stereo. 改否定句: ______________________ 改一般疑问句：_____________________作肯否定回答：__________________ 划提：_____________________________ 三．Must，mustn’t ，can ，can’t 填空 “________ I come at 6 o’clock””Oh no, you needn’t.” A blind man ________ judge colours. “May I go there””No,you_______.” Two eyes ________ see more than one. I _______ be off. Thank you very much for supper. You _______ be careful. You _______ be careless. ______ I stay up till mid-night, please The teacher _______ favour some children more than others.
n e e d m u s t用法及练习集团标准化办公室：[VV986T-J682P28-JP266L8-68PNN]
need用法 一．用作实义动词 1．need sth. 这是need最常见的用法之一，其后的宾语可以是名词，也可以是代词。如： 1). The soup need s salt. 2). They don’t need afraid any more. 3). Does he need any help 2．need doing 与 need to be done 通常物做主语，need后面可跟动名词作宾语，这种情况下应注意两点： ①.主动形式的动名词doing具有被动的含义； ②.该动名词可以改为其动词不定式的被动形式而句子的意义不变。例如： 4). The door needs painting. = The door needs to be painted. 5). Your car needs repairing. = Your car needs to be repaired. 3．need to do sth. 作为实义动词，need后面需要接带to的动词不定式,表示有义务或责任去做某事。如： 6). What do we need to take for the party 7). Will we need to show our ID card 8). I need to take good care of my sister. 二．用作情态动词 ①．没有人称和数的变化。不论主语是第几人称，不论主语是单数还是复数，情态都词都无形式变化； ②．不能单独充当谓语。情态动词必须与一个实义动词一起构成复合谓语，并且这个实意动词要始终是动词原形。 ③．变为否定句时只需在情态动词之后加not。 9)．You needn't do it again．10)．He needn't worry about it． ④．变为疑问句时只需将情态动词提到主语的前面。例如： 11). Need I type this letter again 12）—Need I stay here any longer —No, you needn’t. —Yes, you must. 三．用作名词 need作为名词，含义为“缺乏，需要”；其复数表示“基本需要”。要掌握两个词组：in (great) need of（急需）与meet the needs of(满足……的需要)。例如： 13). There’s no need for you to try again. 14). The factory is in great need of funds. “need+have+done”表示本来需要做某事而没有做。“needn't+have+done”则表示“本来不需要做某事而做了”。 I needn't have bought so much wine—only five people came. He need have hurried to the station. In that case, be wouldn't have missed the train. you need not have said that “should+have+done”意思是“本来应该做某事，而实际没做。” “shouldn't+have+done”表示本来不应该做某事，而实际做了。含有指责对方或自责的含意。 1. Tom, you are too lazy. The work should have been finished yesterday. 2. Look, Tom is crying. I shouldn't have been so harsh on him. 3 you should have told me “must+have+done”表示对过去事情的肯定推测，译成“一定做过某事”，该结构只用于肯定句。 1. It must have rained last night, for the ground is wet. 2. You must have been mad to speak to the servant.
考点二：情态动词can 的用法，表示某人能做某事。 肯定句：主语+can+动词原形+其他 I can play the piano . 否定句：主语+can +not(can’t)+动词原形+其他 I can not (can’t) play the piano . 一般疑问句：Can +主语+动词原形+其他? Can you play the piano? 特殊疑问句：特殊疑问词+ can +主语+动词原形+其他? What can you play ? can play the piano 情态动词must, can, could, may, might 表推测的用法： 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： 1. must的用法 （1）表示推测“可能性”时，意思是“一定、准是”，语气较肯定，较有把握。 He must be American. = It is certain that he is American. 他准是个美国人。（2）must表推测只能用于肯定句。如果要表示“一定不、肯定不”的意思时，应用can`t,如询问某种可能时，应用can。 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） Can he know my address? 他知道我的地址吗？（询问可能性） （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. （现在）他一定有辆小汽车。 He must be doing his exercises in the classroom.（正在进行）他一定在教室里做练习。 He must have finished the work.（过去发生）他一定已完成了工作。 注： must表示推测时很少用于将来的情况。一般不用He must come tomorrow.可用It`s certain / I`m sure that he will come tomorrow. （4）在反意疑问句中，当附属部分含有表示推测意义的must时，疑问部分的助动词应与must 后面的动词在非推测情况下的用法保持一致。
Must 的用法: 1. must (“必须”, 主观上的) / have to (“不得不”, 客观上的) 2. must / need 提问, 其肯定答语用must , 否定答语用needn’t 3. mustn’t 表示禁止 4. 用于猜测句型, 表语气很强的肯定句中. “一定….” 5. 表示人的一种固执“偏要”“非…不可” (指做令人不愉快的事) 6. 做名词: “必须有的东西/做的事” Exercises: 1. I can’t find my key. It ____ in my offi ce. A. can be forgotten B. can be left C. must have been forgotten D. must have been left 2.---What’s that terrible smell? ---Oh, I forgot about the chicken! Go and look, it ______! A. may be burnt B. ought to be boiling C. can be cooking D. must be burning 3. “Oh, peter, you are running a high fever. You ____ go to see a doctor or you’ll miss the entrance exam.” Said the teacher. A. must B. should C. might C. could 4.---_____ you make so much noise? ---Sorry. I’ll take care n ot to. A. Can B. Must C. May D. Would 5.I really _____ go ; I shall miss my bus if I don’t hurry. A. can B. might C. will D. must 6. You _____ use the office phone for private calls during working time. It’s not permitted. A. need n’t B. mustn’t C. may not D. won’t 7.---Wake up, Peter. Time to rise. ---I ____ asleep while I was reading A. must fall B. could fall C. must have fallen D. should have fallen 8.---_____ I book a table for dinner a few days ahead of time? ---Yes, you ____. The restaurant is always full, especially during the holidays. A. Must, will B. Must, can C. Shall, shall D. Shall, must 9.Little Tom ____ have finished his homework; otherwise, he wouldn’t be listening to music. A. can B. shall C. must D. would 10.Apologize? ______ I ? It was all her own fault. A. May B. Shall C. Should D. Must 11.So long as there are more people than needed, there _____ be tests to help make a fairer decision. A. can B. may C. shall D. must 12.____ you take a taxi? There is still plenty of time. A. Can B. Will C. Must D. Should 13.---Tom is never late for work. Why is he absent today?
情态动词must, can, could, may, might 表推测的用法： 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： 1. must的用法 （1）表示推测“可能性”时，意思是“一定、准是”，语气较肯定，较有把握。 He must be American. = It is certain that he is American. 他准是个美国人。 （2）must表推测只能用于肯定句。如果要表示“一定不、肯定不”的意思时，应用can`t,如询问某种可能时，应用can。 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） Can he know my address? 他知道我的地址吗？（询问可能性） （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. （现在）他一定有辆小汽车。 He must be doing his exercises in the classroom.（正在进行）他一定在教室里做练习。 He must have finished the work.（过去发生）他一定已完成了工作。注：must表示推测时很少用于将来的情况。一般不用He must come tomorrow.可用It`s certain / I`m sure that he will come tomorrow.
must 的用法 1．（表示义务、命令或必要）必须、应当。如： Soldiers must obey orders． 2．（表示推断或指具有较大的可能性，常与be连用。否定句 用can not be）必定、很可能。如：You must be very tired．3．表示请求（may ，can也有这种用法，但must的语气更重）。如：Must I go now ？（肯定回答可用：Yes，please．否定回答用：No，you needn't．） 4．（表示不可避免性或肯定性）必然要、必定要。如：Man must die． 5．（表示与说话人的愿望相反及不耐烦语气）偏要。如： Why must it rain on Sunday ？ 注意：must的否定式must not可以缩写成mustn 't，表示禁止、不允许。表示“不必要”时用needn't。 1. 表示“必须”、“一定要” (1) 可用于肯定句、否定句或疑问句；用于否定句时，mustn't 的意思是“一定不要”、“不能”，而不是“不必”： You must finish it today. 你一定要在今天完成它。 You must see the doctor. 你一定要看医生。
Must you go so soon? 你一定得这么早就走吗? We mustn't think only of ourselves. 我们可不能只考虑自己。 (2) 主要表示现在或将来，但有时(如在间接引语中)也可表过去(=had to)： She asked if she must (had to) leave. 她问她是否一定要离开。 (3) 对于must 开头一般疑问句，若要作否定回答，可用needn't，不用mustn't： "Must I come over tonight?" "No, you needn't." “我今晚必须过来吗?”“不必。” (4) 其后可接被动结构或进行形式： Something must be done to stop it. 必须采取措施来阻止它。 I think I must be going. 我想我得走了。 2. 表示推测。意为“准是”、“一定是” (1) 通常只用于肯定句，在否定句或疑问句用can 代之： It must be true. 那一定是真的。 比较：Can it be true? 那可能是真的吗? / It can't be true. 那不可能是真的。 (2) 后接动词原形，表示对现在情况的推测： He must be wrong. 他一定错了。 The man must have a lot of money. 这个人一定有不少钱。 注：must 表示对现在情况的推测后接动词原形时，该动词通常为状
情态动词must 的用法 1.must 表示必要性，“必须”（肯定句，疑问句常见） Must I start at once? 例题 你必须现在睡觉。_________________. 2.否定式mustn’t 表示“禁止” 例题 不许我们再迟到了。_________________ 3.由must 引导一般疑问句时，肯定回答用must，否定回答用 needn’t 或don’t have to. ---- Must I stay at home? ---- Yes, you ___ / No, you _________________. 4.当出现反问句式时，如果其陈述部分must 表示“必须，有必要” 时，反问句用needn’t，如果其陈述部分mustn’t 表示“禁止”，反问句用must. 例题 ① ----You must go there, ______you? ---- Yes, I must. / No, I needn’t/don’t have to. ② You mustn’t go there, _________you? 5.must 表示推测时，有3种形式时，反问句与must 后的动词保持 一致。 ⑴对现在的动作进行推测
①You must be hungry now, aren’t you? ②You must have the wrong number. There is no such person, haven’t/ don’t you? ⑵对正在进行的动作进行推测 He must be doing his homework, isn’t he？ ⑶对过去发生的动作进行推测 ① You must have read this book, haven’t you? ②It must have snowed yesterday, didn’t you? 6.must 用于反语，表示劝诫。 -----Must you make so much noise?(你非得吵这么大声吗？) -----Sorry, I’ll try not to. 例题 John, look at the time, ___ you play the piano at such a later hour? A. must B. can C. may D. need 7.与说话人的愿望相反，“偏偏，偏巧”。 友情提示：本资料代表个人观点，如有帮助请下载，谢谢您的浏览！