what had you done by the time were three years old

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what had you done by the time were three years old
what had you done by the time were three years old

what had you done by the time were three years old
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?

这句话有一点语病,更好地应该是
what had you done by the time were three years older.

整理句式就是Time have you done(时间对你做完了什么,主语) were谓语 three years older表语
翻译:时光雕琢了你,让你老了三岁。

希望对你有所帮助。

时间对你做的不过是使你老了三岁

你好。句子有问题。应该是:
1 What had you done by the time you were 3 years old?
2 What did you do when you were 3 years old?