题目内容
6.Mary does her homework every weekend.(改为否定句)Marydoesn't do her homework every weekend.
分析 --每个周末玛丽做她的家庭作业.
--玛丽每个周末都不做她的作业.
解答 答案:doesn't do.考查否定句.根据does,可知一般现在时态,主语是Mary,第三人称单数.含有实义动词,变否定句在实义动词前加doesn't,实义动词变原形do.答案是doesn't do.
点评 考查否定句.通常是在be动词,情态动词后加not.一般现在时态,主语不是第三人称单数用don't,主语是第三人称单数用doesn't.一般过去时态用didn't.还有其它用法需要牢记.
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