✅ 问句：Must I …? 我必须……吗？
✅ 肯定回答：Yes, you must. 是的，你必须。
✅ 否定回答：No, you needn't. / No, you don't have to.
不必（没有必要，不是禁止）
Must I…? 否定回答不能用 mustn’t！
mustn’t 含义是：禁止，不许，不准（语气很强，表不允许做）
例句👇
— Must I finish the work right now?
我必须立刻完成这项工作吗？
— Yes, you must. 是的，你必须。
— No, you needn't. / No, you don't have to.
不，你不必。
拓展区分
mustn’t = 禁止，不准
You mustn’t smoke here. 你不准在这里吸烟。
配套情景对话题👇
1. — Must I hand in my report before Friday?
— ______. You can give it to me next Monday.
A. Yes, you must B. No, you needn’t
C. Yes, you can D. No, you mustn’t
2. — Must we clean the lab after the experiment?
— ______. But you must tidy your own desk.
A. Yes, you have to B. No, you don’t have to
C. Yes, you can D. No, you can’t
3. — Must I practise the dialogue again?
— ______. The teacher will check it in class.
A. Yes, you must B. No, you needn’t
C. Yes, you may D. No, you won’t
4. — Must we stop taking photos here?
— Yes, you ______. Look at the sign “No photos”.
A. need B. can C. must D. should
5. — Must I stay at home during the whole holiday?
— ______. You can go out with your parents.
A. Yes, you must B. No, you needn’t
C. Yes, you should D. No, you mustn’t
答案
1.B 2.B 3.A 4.C 5.B
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