should/ought to/must/have to + V Sentence Patterns ` 1 2 one can as…as possible

should/ought to/must/have to + V 1. You should show your sister how to tidy her own things; you shouldn’t just complain. 2. We ought to put as little as possible into the garbage can; we ought not to produce too many wastes. Examples: 1

should/ought to should/ought to/must/ have to + V /must/have to + V 3. People visiting a foreign culture must use gestures with caution; they mustn’t use gestures at will. 4. To tell different foods apart, we have to use our noses; we don’t have to use our ears. Examples: 1

Exercise A: Choose a proper word to complete each of the following sentences. The first one has been done for you. 1. You’ve been working for twenty hours. You (must, ought, has to) get some rest. 2. The meeting will begin at nine. That means we (shouldn’t, ought to, had to) get there by eight- thirty to prepare everything. We (should, don’t have to, mustn’t) be late.

3. Sharon (must, had to, shouldn’t) go to school this morning, but she didn’t. Maybe she (should, must, has to) call her classmates to learn about today’s homework. 4. A lie (must, didn’t have to, ought not to) be told in any cases; if you tell a lie, you will (must, have to, ought to) tell more lies to explain it away.

5. It’s raining heavily. You (must, didn’t have to, ought not to) drive so fast; you (should, don’t have to, have to). 6. I saw Monica’s boyfriend dating another girl yesterday. I (ought not to, must, had to) tell Monica about this. As her best friend, I (shouldn’t, ought not, don’t have to) pretend ( 假裝 ) that I know nothing.

prove stare disturb allow collect Exercise B: Use the modals given in parentheses and the verbs from the box to complete the following sentences. The first one has been done for you. 1. If you want others to trust you, you must prove (must) that you are trustworthy.

prove stare disturb allow collect 2. You (should) your son to ride a motorcycle. He is only thirteen. shouldn’t allow 3. On a bus or a train, we _______________ (ought) at people sitting across; it’s not polite to do that. ought not to stare

prove stare disturb allow collect 4. I’m sorry I (have) you late last night. Did my call cause any inconvenience? had to disturb 5. This beach is part of the national park. People _____________ (must) sea stars or do any fishing here. mustn’t collect

We can put as little as possible into the garbage can. → We can put as little as we can into the garbage can. Example 2 one can as…as possible

1. If you want to take a trip to the United States, you should save as ___________ _____________________________. much money as possible/much money as you can Exercise A

2. Get up as ___________________________ so that you won’t miss the first bus. early as possible/early as you can

3. They walked as __________________ _________________ so as not to wake up the baby. quietly as possible/ lightly as they could

4. To be the top student in her class, Jane studied as ____________________________. hard as possible/hard as she could

5. The teacher wanted to make everybody hear him, so he spoke as ______________ ______________. loud as possible/ loud as he could

Exercise B 1. A: I’m sorry for being a little late. But I tried to get here as ________________. B: That’s OK. The traffic is always terrible. quickly as possible

2. A: I have finished the math homework. Let’s go to the movies. B: No way! How could you finish it in less than half an hour? A: I did it as ______________. fast as possible

3. A: I’ve got a terrible headache. I must have a cold. B: Get some rest and drink as _______ ______________. much water as possible

4. A: You only ate an apple for lunch. Why? B: I’m on a diet. I try to eat as _________ ___________. as little as possible

5. A: The traffic is so heavy here. B: Yeah, you have to be as __________ ________ when you cross the street. careful as possible