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/'d??:n?l?st?/?
/?'hed/??
/'kwest??nz/??
answer?
/b?ld/?
/'kra?d?d/?
Have a match.
Must we exercise to prevent the flu?
Yes, you must.
Must we take some medicine to prevent
the flu?
No, you needn’t./ No, you don’t have to.
注意：此处不能用 mustn’t 回答。(mustn’t 表示禁止；不准) 此处为没必要。
1. Must we get to the train station at 9:00?
__________ The train leaves at 9:15.
2. Must I do my homework now?
____________ You can have dinner first.
Yes, you must.
No, you needn’t.
Pairwork: make conversations.
Listen to 1a and answer the following questions.
1. How many suggestions does Dr. Li give to us ?
2. Must we go to see a doctor at once when
we have the flu?
Listen again and check Dr.Li's advice.
1. do exercise often
2. keep the air fresh
3. go to bed early
4. wash hands and change clothes often
5. keep our rooms clean