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怎么区分was,had,did
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怎么区分was,had ,did
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答案和解析
was是系动词
did是助动词
had 一般用在过去完成时
可以结合着句子具体分析,不懂再问哈
did是助动词
had 一般用在过去完成时
可以结合着句子具体分析,不懂再问哈
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