题目内容
1.They must return the books now.(改为一般疑问并否定回答)Must they return the books now?No,theyneedn't.
分析 --他们现在必须还书.
--他们现在必须还书吗?不,他们不需要.
解答 答案:Must;needn't.考查一般疑问句及否定回答.含有情态动词must的句子,变一般疑问句,must提前.否定回答用No,they needn't,不,他们不需要.mustn't不允许,命令口气,不符合.答案是Must;needn't.
点评 一般疑问句变法,要考虑助动词、be动词、情态动词等的用法,还要考虑时态、人称、固定用法.根据语境完成试题.
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