We have been friends with each other since he came to our school.
主句为什么不用过去完成时
人气：267 ℃ 时间：2020-01-24 07:54:22
解答
since 是现在完成时的标志,不是过去完成时.
加油!不明白再问!如果帮到你,请采纳,谢谢!可since接的是过去时啊since 后的句子一定是过去时，而主句用现在完成时。（要记住哦）since 还可接表示过去的时间状语，如 We have been friends since last year.明白了，谢谢
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