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№4. Измените предложения в соответствии с данным примером.

E.g You must come at 9 o’clock. (the classes begin at 10 o’clock)

You needn’t come at 9 o’clock as the classes begin at 10.

1. You must speak louder. (I hear you quite well)

2. He must hurry if he wants to catch the train. (he has plenty of time)

3. I must stay at home tonight. (nobody is going to call on me)

4. You must buy this dictionary. (you can borrow it from the library)

5. You must wait for your friend. (you’ll ring him up in the evening)

6. You must help your brother. (he is old enough to do it)

7. You must baby sit tonight. (the parents are staying at home)

8. She must go to the clinic at once. (the doctor is coming here)

9. You must post the letter at once. (I’m going past the post – office)