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英语
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Four years()since I ()the army 求分析
为什么是 has passed joined
而不是 passed have joined
人气:332 ℃ 时间:2019-11-04 14:33:18
解答
Four years has passed since I joined the army .我参军四年了.
since 引导的时间状语从句,主句用现在完成时,从句用一般过去时表示.
eg .I have lived here since I was born .
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