I started collecting stamps five years ago.改同义句 I

发布时间：2021-02-27 15:46:32

I started collecting stamps five years ago.改同义句 I

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1.= I (have) collected stamps (for) five years.
2.happening
something和happen之间为主动关系（而且happen是不及物动词,不能用于被动语态）,所以用其现在分词形式happening做后置定语,修饰something
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======以下答案可供参考======
供参考答案1:
begin for.
happened
供参考答案2:
have since
happened
应该对吧，望采纳
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