Usedn’t 亦可拼作usen’t，但发音皆为[ju:znt]。

　　　 其反意疑问句或简略回答中，也有两种形式：
　　　 She used to be very fat, didn’t she? （正式）/ use(d)n’t she? （口语）
　　　 Did you use to play chess? Yes, I did.
　　　 Used you to get up early in the morning? Yes, I did. (Yes, I used to.)
　　2．Had better意为“最好”，后接不带to的不定式。如：
　　　 — We had better go now.
　　　 — Yes, we had (we’d better / we had better).
　　　 Hadn’t we better stop now? (Had we better not stop now?)
　　　 I think I’d better be going. （用于进行时态，表“最好立即”）
　　　 You had better have done that. （用于完成时态，表未完成动作）
　　注：①had best与had better同意，但较少用。②You had better … 用于同辈或小辈，对长辈不可用。
　　3．Would rather意为“宁愿”，表选择，后接不带to的不定式。
　　　 如：I’d rather not say anything.
　　　　　 Would you rather work on a farm?
　　　 　　— Wouldn’t you rather stay here?
　　　 　　— No, I would not. I’d rather go there.
　　　 由于would rather表选择，因而后可接than。
　　　 如：I would rather work on a farm than in a factory.
　　　 　　I would rather watch TV than go to see the film.
　　　 　　I would rather lose a dozen cherry trees than that you should tell me one lie.
　　　 　　I’d rather you didn’t talk about this to anyone. （句中的’d rather不是情态动
　　　 　　词，would在此是表愿望的实义动词）

III.情态动词练习部分
1）单项选择
　　1. You ___ hand it in at once, you may hand it in tomorrow.
　　(A) needn't 　　　(B) may not 　　　(C) can't 　　　(D) must not

　　2. “That must be a mistake.” “No it ___ a mistake.”
　　(A) must not be　　　 (B) needn't be 　　　(C) cannot be 　　　(D) would not be

　　3. You ___ go now. It's getting late.
　　(A) had rather 　　　(B) would 　　　(C) had better 　　　(D) would

　　4. Since the bus is crowded, we ___.
　　(A) had better walk to home　　　　 (B) have better walk home
　　(C) had better walk home　　　　　　(D) had better to walk home

　　5. “You ___ come in now, Mary! It's getting cold!” “I __ go on playing in the garden.”
　　(A) had better...had better　　　　 (B) would rather...had better
　　(C) had better...would rather 　　　(D) had better...would have better

　　6. When I was a boy, I ___ chocolate.
　　(A) would like 　　　(B) was used to like 　　　(C) should like 　　　(D) used to like

　　7. I wasn't supposed to go to the movies, but I ___ myself.
　　(A) cannot help　　　 (B) couldn't but　　　 (C) had to help 　　　(D) couldn't help

　　8. Looking at my determined face, the big boy ___ pick up the fight.
　　(A) dares not 　　　(B) dare not 　　　(C) doesn't dare　　　 (D) dares not to

　　9. You ___ to the meeting this afternoon if you have something important to do.
　　(A) needn't to come　　 (B) don't need come　　 (C) don't need coming 　(D)needn't come

　　10. When the storm comes all windows ___.
　　(A) ought to close　 　　　(B) ought to be closing 　
　　(C) ought to be closed 　　(D) ought to closed

　　11. I ___ me what happened.
　　(A) would like you tell 　　　　　(B) would like you to tell
　　(C) would like you telling　　　　(D) would like you that you tell

　　12. She ___ for yesterday's test, but she didn’t.
　　(A)should have studied　　　　(B) would study
　　(C) might be studying 　　　　(D)must have studied

　　13. He ___ breakfast at eight o'clock when he lived alone. But nowadays he ___it at seven.
　　(A) was used to have ... is having 　　　(B) was used to having ...is having
　　(C) used to have ... has 　　　　　　　　(D) used to having ...was

　　14. Everybody ___ in bed.
　　(A) has to spend some time　　　 (B) have to spend some time
　　(C) has to spend sometimes 　　　(D) have to spend sometimes

　　15. Johnny, you _____ play with the knife, you _____ hurt yourself.
　　A. won’t; can’t 　　B. mustn’t; may　　 C. shouldn’t; must 　　D. can’t; shouldn’t

2) 选择合适的词或词组填空
　　1. I have a headache. I __________ take an aspirin.
　　　 (had better; would better)

　　2. He looks sleepy. He must __________ bed very late last night.
　　　 (go; have gone)

　　3. I want to go to the office, but you __________ with me.
　　　 (need not to go; need not go)

　　4. I ought __________ those books to the library last week.
　　　 (to have taken; to take)

　　5. The mother is telling her son, “You __________ eat with your fingers!”
　　　 (wouldn’t; mustn’t)

　　6. He was a good swimmer so he _______ swim to the river bank when the boat sank.
　　　 (was able to; could)

　　7. To travel from England to Scotland you __________ a passport.
　　　 (don’t need; needn’t)

　　8. He went on foot, but he __________ by bus.
　　　 (ought have gone; should have gone)

　　9. A: Did Ken take the job in the bookstore?
　　　 B: No, but I think he __________.
　　　 (must have; should have)

　　10. He __________ talk for hours, if you let him.
　　　　(can; will)

　　11. You __________ use this toothbrush, it’s mine.
　　　　(may not; shall not)

　　12. No matter what people say, I __________ do as I like.
　　　　(shall; will)

　　13. “I’m willing to let you take whatever you like.” Means “you ______ take whatever
　　　　you like.”
　　　　(shall; will)

　　14. A: I haven’t felt well for a week.
　　　　B: You __________ see a doctor.
　　　　(had better; should have to)

　　15. A: He is late, __________ he have missed the bus?
　　　　B: Yes, he must have missed the bus.
　　　　(Can; Must)

参考答案：
　　1） 单选： 1-10 ACCCC DDBDC 11-15 BACAB
　　2) 选择词组
　　1. had better
　　2. have gone
　　3. need not go
　　4. to have taken
　　5. mustn’t
　　6. was able to
　　7. don’t need
　　8. should have gone
　　9. should have
　　10. will
　　11. shall not
　　12. will
　　13. shall
　　14. had better
　　15. Can