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英语
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it has been a long time since+?since后面加什么形式?
人气:415 ℃ 时间:2019-08-21 02:13:30
解答
since加从句 ,时态用过去式
这是一个固定的句式,意思是:什么事情发生已经多少时间了
it is/was (或完成时) +一段时间+ since+从句
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