①Come here, Mary. If you stand at this angle, you ______ just see the sunset.
A. must B. need C. can D. should
②There were so many people in the hall then that I _______ hardly pick out my sister.
A. should B. would C. could D. might
③It was so noisy that we _______ hear ourselves speak.
A. couldn’t B. shouldn’t C. mustn’t D. needn’t
①_______ I have a word with you? It won’t take long.
A. Can B. Must C. Shall D. Should
②—Could I use your bike, Jack?
—Of course, you _______.
A. can B. may C. could D. might
①Although you _______ find bargains in London, it’s not generally a cheap place to shop.
A. should B. need C. must D. can
②Their hope was that a new and better country _______ be born.HYPERLINK "http://www.gkstk.com/"http://www.gkstk.com/
A. may B. could C. must D. need
can not but do sth.不得不，只好
can not help but do sth.不得不，禁不住做某事
①Mike is kind, determined and full of energy. In a word ________, I can’t speak too highly of him.
A. won’t B. can’t C. can D. will
②He is such an unselfish man. You cannot help but _______ him.
A. respect B. to respect C. neglect D. to neglect
③I _______ the truth of your remarks, although they go against my interests.
A. cannot but admit B. cannot but to admit
C. cannot but admitting D. cannot help but admitting
5.表示“经过努力后终于能……”用be able to，它比can有更多的时态形式上的变化
—Didn’t they come to the party last week?
—Yes. They didn’t want to come with us at first, but then we _______ persuade them.
A. would B. could C. were able to D. had to
①—May I take this book out of the reading room?
—No, you _______. You read it in here.
A. mightn’t B. won’t C. needn’t D. mustn’t
②—_______ I take the book out?
—I’m afraid not.
A. Will B. May C. Must D. Need
①Some people who don’t like to talk much are not necessarily shy; they _______ just be quiet people.
A. must B. may C. should D. would
②The traffic is heavy this day, I _______ arrive a bit late, so could you save me a place?
A. can B. must C. need. D. might
③Children of divorced parents _______ have difficulty in forming stable relationships themselves.
A. will B. should C. may D. could
①_______ every one of you succeed in passing the mid-term examination.
A. May B. Could C. Might D. Would
②—My e— dictionary is nowhere to be found. Who _______ have taken it?
—Keep looking and you will find it. _______ you have good luck!
A. should; Need B. should; May C. could; May D. could; Need
①His way of addressing one hard problem last Friday _______ give rise to another.
A. would rather B. may well C. shall D. need
②— Well, lost again!
— It is not very important. We _______ forget about it. OK?
A .cannot but B. have to C. might well D. might as well
①Doctors say that exercise is important for health, but it _______ be regular exercise.
A. can B. will C. must D. may
②—Shall I inform him of the change of the schedule right now?
—I am afraid you _______, in case he comes late for the meeting .
A. will B. must C. may D. can
③The traffic light is red, so I _______ stop my car.
A. must B. have to C. can D. mustn’t
④The money was soon spent, so he _______ go hungry .
A . must B . had to C . might D . should
⑤The new law states that people drive after drinking alcohol.
A. wouldn’t B. needn’t C. won’t D. mustn’t
2.表示“不必”，须用don’t have to或needn’t。must的否定式表示“禁止，绝对不可”
①You _______ buy a gift , but you can if you want to.
A. must B. mustn’t C. have to D. don’t have to
②—What do you think we can do for our aged parents?
—You _______ do anything except to be with them and be yourself
A. don’t have to B. oughtn’t to C. mustn’t D. can’t
—_______ you interrupt now? Can’t you see I’m on the phone?
—Sorry Sir, but it’s urgent.
A. Can B. Should C. Must D. Would
①—_______ I book a table for dinner in advance?
—Yes, you _______.The restaurant is always full of people.
A. Must; can B. Will; will C. Shall; need D. Shall; must
②—_______ he come in or wait outside?
—Let him in, please.
A. Shall B. Will C. Does D. Has
①—I haven’t got the reference book yet, but I’ll have a test on the subject next month.
—Don’t worry. You _______ have it by Friday.
A. could B. shall C. must D. may
②You _______ be driven out of the school if you dare to cheat in the exam.
A. should B. would C. will D. shall
③One of our rules is that every student _______ wear school uniform while at school.
A. might B. could C. shall D. will
①Hurry up, if you _______ there with us.
A. go B. will go C. would go D. could go
②— Would you open the window, please ?
—Yes, I _______.
A. will B. would C. do D. can
③—Why didn’t you come to Simon’s party last night?
— I wanted to ,but my mom simply _______ not let me out so late at night.
A. could B. might C. would D. should
④Days later, my brother called to say he was all right, but _______ say where he was.
A. mustn’t B. shouldn’t C. wouldn’t D. mightn’t
①Take care! Accidents _______ happen along this part of the road.
A. will B. would C. must D. shall
②Every time they met, they _______ talk about former classmates they remembered.
A. could B. would C. should D. will
③The door _______ open , no matter how hard she pushed.
A. shouldn’t B. couldn’t C. wouldn’t D. mightn’t
④We _______ live in a small flat but last year we bought a house.
A. would B. had to C. used to D. ought to
ought to表示根据某种义务或必要“应当”做某事，ought to反问形式是“shouldn’t/oughtn’t+代词”
①—I find it astonishing that your desk-mate _______ be so rude to you.
—Not astonishing at all. She is always rude to anyone else.
A. should B. must C. might D. ought to
②You _______ be sitting in this waiting room, sir. You see, it is for women and children only.
A. oughtn’t to B. dare not C. need not D. will not
③The child ought to be punished, _______?
A. shouldn’t he B. oughtn’t the child C. ought he D. should he
dare(敢，胆敢)可以既作情态动词又作实义动词：dare用作实义动词，用在肯定句、否定句和疑问句中，有人称变化和过去时形式，dare(s/d) to do sth, 但在否定句中，后面的不定式可带to，也可不带to；dare作情态动词主要用于否定句、疑问句或条件句中，没有人称的变化，但是有过去式dared，但I dare say(常用作插入语)除外。
①—Who is late for class again?
—_______ you ask? Tim, of course.
A. Dare B. May C. Can D. Need
②I _______ use a clock to wake me up because at six o’clock each morning the train comes by my house.
A. couldn’t B. mustn’t C. shouldn’t D. needn’t
③—Miss White has decided to explore in the forest by herself.
—She _______ ask her boyfriend to if she _______ go walking in the forest.
A. needn’t to; dares to B. doesn’t need; dares C. need not to; dare to D. needn’t; dare
④Tom _______ show his exam results to his parents.
A. dare not B. dared C. dare to D. dares not to
①—Hi, Tom. Any idea where Jane is?
—She _______ in the classroom. I saw her there just now.
A. shall be B. should have been C. must be D. might have been
②—I have to go home now. Daddy and Mummy _______ be waiting for me.
—OK. See you.
A. shall B. need C. can D. must
③He _______ be reading in the reading room, for I saw him in the street just now.
A. shouldn’t B. can’t C. shouldn’t D. needn’t
It can’t be true.那不可能是真的。
What can he possibly want?他可能会想要什么呢？
He is in poor health. He can be ill at any time.他身体不好，随时都可能会生病。
Even experts can make mistakes.甚至连专家也可能会出差错的。
My mother could be very unpleasant at times.我母亲有时候会让人非常不愉快。
We could/may/might go to Japan this summer.(不可以用can)
You could [may/might] be right, but I don’t think you are. (不可以用can)
—Is there an express to Beijing tonight?
—There might be, but you’d better call the booking office to make sure.
The public transport in Beijing is very convenient, so there shouldn’t be any difficulty in traveling around the city.现在北京的公共交通非常便利，所以在市区观光不应该有什么困难。
①It _______ be the postman at the door. It’s only six o’clock.
A. mustn’t B. can’t C. won’t D. needn’t
②—It’s so late. Our son _______ be back!
—Don’t worry. I dare say he _______ have some extra work to do.
A. can; must B. will; might C. should; must D. must; may
③—Artistic people _______ be very difficult sometimes.
—Well, you should know for you married one.
A. can B. might C. could D. must
④—Is there anything else I can get for you except the book?
—No. That _______ be it. Thanks a lot.
A. could B. must C. should D. might
1.could +have done表示“本可以做而实际上未能做”
2.cannot+ have done表示“对现在或过去发生过的事情的否定推测”
3.might(may)+ have done表示“对过去发生的行为不太肯定的推测”
4.must+ have done表示“对过去发生的行为肯定的推测”。其否定式为：cannot have done
5.needn’t+ have done表示“本来不必要做的而实际上又做了”
6.should(ought to)+have done表示本来应该做而实际上又没有做”。其否定形式表示“某种不该发生的事情或行为却发生了”
①The children _______ lost in the woods; otherwise, they would have been at the lakeside camp as scheduled.
A. must have got B. must get C. should have got D. should get
②Why are your eyes so red? You _______ have slept well last night.
A. can’t B. mustn’t C. needn’t D. won’t
③Had they known what was coming next, they _______ second thoughts.
A. may have B. could have C. must have had D. might have had
④We _______ the difficulty together, but why didn’t you tell me?
A. should face B. might face C. could have faced D. must have faced
⑤—Sorry, Mum! I failed the job interview again.
—Oh, it’s too bad. You _______ have made full preparations.
A. must B. can C. would D. should
⑥The weather turned out to be fine yesterday. I _______ the trouble to carry my umbrella with me.
A. should have taken B. could have taken C. needn’t have taken D. mustn’t have taken
虚拟情况从句谓语主句谓语与现在事实相反过去式(be用were)would/should/could/might do与过去事实相反had donewould/should/could/might have done与将来事实相反过去式或者were to do/should dowould/should/could/might do①Grace doesn’t want to move to New York because she thinks if she _______ there, she wouldn’t be able to see her parents very often.
A. lives B. would live C. has lived D. were to live
②Sorry, I am too busy now. If I _______ time, I would certainly go for an outing with you.
A. have had B. had had C. have D. had
③You didn’t let me drive. If we _______ in turn, you _______ so tired.
A. drove; didn’t get B. drove; wouldn’t get
C. were driving; wouldn’t get D. had driven; wouldn’t have got
省略if后，将虚拟条件从句中的were, had, should提到主语前构成倒装
①_______ fired, your health care and other benefits would not be immediately cut off.
A. Would you be B. Should you be C. Could you be D. Might you be
②Were it not for the debt, we _______ a happy life.
A. are living B. would live C. were living D. will live
③_______, I wouldn’t have finished my homework.
A. If you didn’t help me B. Had you not helped me
C. If you haven’t helped me D. Haven’t you helped me
①Maybe if I _______ science, and not literature then, I would be able to give you more help.
A. studied B. would study C. had studied D. was studying
②It is hard for me to imagine what I would be doing today if I _______ in love, at the age of seven, with the Melinda Cox Library in my hometown.
A. wouldn’t have fallen B. had not fallen C. should fall D. were to fall
We _______ John’s name on the race list yesterday but for his recent injury.
A. will put B. will have put C. would put D. would have put
Without the air to hold some of the sun’s heat, the earth at night _______, too cold for us to live on.
A. would be freezing cold B. will be freezing coldly
C. would be frozen cold D. can freeze coldly
We lost our way in that small village, otherwise we _______ more places of interest yesterday.
A. visited B. had visited C. would visit D. would have visited
①He _______ fatter but he eats too little.
A. would become B. would have become
C. must become D. must have become
②He _______ the exam, but he was too careless.
A. could have passed B. couldn’t have passed
C. must have passed D. may have passed
(1)suggest, order, propose, request, require, demand, advise, insist, urge, recommend+ 宾语从句(should )do
(2)It is suggested/advised/ordered/requested/required…+ that从句(should) do
(3)My advice/suggestion/request/requirement/order/proposal...+ is +表语从句(should)do
(4)The suggestion/advice/request/requirement...+同位语从句(should )do+ is…
①The doctor recommended that you _______ swim after eating a large meal.
A. wouldn’t B. couldn’t C. needn’t D. shouldn’t
②John’s pale face suggested that he _______ ill, and his parents suggested that he _______ a medical examination.
A. be, should have B. was, have C. should be, had D. was, has
③I followed his advice that I _______ my study plan.
A. changed B. would change C. change D. had changed
(5)It is natural/necessary/strange/vital... +that从句(should)do表惊奇、怀疑、惋惜、不满、理应如此等
It’s vital that the theory _______ practice, or it could just be something meaningless.
A. shall be applied to B. is applied for
C. be applied for D. be applied to
(6)wish + that clause (did/were 与现在相反)
wish + that clause (would/could/might + do与将来相反)
wish + that clause (had done 与过去相反)
①—Do you know his address?
—No, I also wish I _______ where he _______.
A. knew, live B. knew, lives C. know, lives D. know, lived
②I wish I _______ play tennis with my brother this afternoon, but I have to study for a test.
A. can B. should C. could D. shall
③How I wish _______ more when I was at university, which is too late now.
A. I would learn. B. I would have learned
C. I had learned D. I learned
(7)It is(high)time +that 从句(did或should do)
Jack is a great talker. It’s high time that he _______ something instead of just talking.
A. will do B. has done C. do D. did
2.would rather +从句
①I would rather you _______ my advice. Now you’ve got a bad result. It serves you right.
A. took B. would take C. had taken D. take
②I would rather she _______ here tomorrow because I’m too busy.
A. will come B. would come C. had come D. came
③We would rather our daughter _______ at home with us, but it is her choice, and she is not a child any longer.
A. would stay B. has stayed C. stayed D. stay
与现在事实相反：从句谓语动词用一般过去时If only my grandmother were with me!
与过去事实相反：从句谓语动词用过去完成时If only she had not left!
与将来事实相反：从句谓语动词用过去将来时If only he would come tomorrow!
①Look at the trouble we’re in. If only we _______ our teacher’s advice.
A. had taken B would have taken C. took D. have taken
②—I should have gone to the wonderful concert with you yesterday.
—What a shame! If only we _______ another such chance.
A. will have B. would have C. had had D. have
③—Mary! If only we _______ less homework today!
—I couldn’t agree more. We all need more relaxation.
A. will have B. have had C .had had D. had
4.as if/as though引导的状语从句
与现在事实相反：从句谓语动词用一般过去时He talks as if he knew where she was.
与过去事实相反：从句谓语动词用过去完成时He talks about Rome as if he had been there before.
与将来事实相反：从句谓语动词用过去将来时He opened his mouth as if he would say something.
注意：“as if/as though”引导的状语从句中也可以用陈述语气：
It sounds as if it is raining.听起来像是在下雨。
He talks as if he is drunk.从他谈话的样子来看他似乎是喝醉了。
①John is so strongly built that he looks as if he _______ an elephant.
A. lifts B. is lifting C. lifted D. could lift
②He described the town as if he _______ it himself.
A. had seen B. has seen C. saw D. sees
③They talked and talked as though they _______ meet again.
A. won’t meet B. never met C. would never meet D. should never meet