考点演练
一、用方框中所给词的适当形式完成句子。
must mustn't have to don't have to
1. There is no bus now. I'll ________ walk home.
2. You ________ be careful when you cross the road.
3. We ________ cross the road when the traffic light is red.
4. It's Sunday today. You ________ go to school.
5. You ________ not get off the bus before it has come to a full stop.
6. He ________ stay at home to look after his mother because she is ill.
7. She ________ work at weekends. She can have two days off.
二、同义句转换。
1. I don't know when we will have the meeting.
I don't know when ________ ________ ________ ________.
2. The question is where we should put it.
The question is where ________ ________ it.
3. There are so many beautiful dresses. I can't decide which one I should buy.
There are so many beautiful dresses. I can't decide ________ ________ ________ ________.
4. The young woman doesn't know what she should do.
The young woman doesn't know ________ ________ ________.
5. — I haven't decided when I will go on a trip to Shanghai.
— Why not go there next Friday?
— I haven't decided ________ ________ ________ on a trip to Shanghai.
— Why not go there next Friday?

一、1. have to 2. must 3. mustn’t 4. don’t have to 5. must 6. has to 7. doesn’t have to
二、1. to have the meeting 2. to put 3. which one to buy 4. what to do 5. when to go