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what had you done by the time were three years old
题目详情
what had you done by the time were three years old
▼优质解答
答案和解析
by the time 到.时间为止.
by the time you were three years old 到你三岁时为止.
在这里可以理解为 by the time 引导时间状语从句,但你在从句里面把主语漏打了.
What had you done 你已经做了什么?
这个句子用了过去完成时.by the time 如果指的是过去某个时间,则主句多用过去完成时.
全句中文意思：到你三岁时为止,你已经做了什么?
by the time you were three years old 到你三岁时为止.
在这里可以理解为 by the time 引导时间状语从句,但你在从句里面把主语漏打了.
What had you done 你已经做了什么?
这个句子用了过去完成时.by the time 如果指的是过去某个时间,则主句多用过去完成时.
全句中文意思：到你三岁时为止,你已经做了什么?
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