must的一般疑问句用法及回答:
对must开头的一般疑问句,肯定回答时要用must。
例如: Must he go to school today?他今天必须去上学吗?Yes, he must.是的,他必须。
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否定回答时,不能用mustn't,要用needn't 或don't/doesn’t/didn’t have to。must作为情态动词,后接动词原形,表示“必须”、“一定”等含义。
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例如: Must he go to school today?他今天必须去上学吗?No, he needn't.或No, he doesn't have to.不,他不必。