have seen 和seen的差别是什么?(急!)— He can't find his hat.Have you seen it?— Yes,of course.I
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A.问题里是Have you seen,那你回复里也跟著用 have seen 就好了
如果对方问你 Did you see it?那你回答 I saw it on his bed 也可以
seen 是从 see > saw > seen 来的,
======以下答案可供参考======
供参考答案1:
答案是A差别要看你怎么用,举个例我才能回答你啊 :)