英语问题：在特定的情景中,为什么by which time可以改成by the time when he came ba

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英语问题：在特定的情景中,为什么by which time可以改成by the time when he came back?
先行词是time,可是time 无法和引导词互换啊

把你的句子写出来,就可以解答了.快.
再问：例句：He came back late,by which time all the guests had alredy left.
再答： ok，应该是：He came back late, at about 9:00 pm ,by which time all the guests had alredy left.你的句子很可能漏了一个时间状语------ at about 9:00 pm 。
变成你要的结构就是：
He came back late, at about 9:00 pm ,by which time all the guests had alredy left
== By the time he came back quite late, at about 9:00 pm all the guests had alredy left.
-------这大概就是你想表达的吧？
再问：请问By the time he came back late是一个什么类型的句子
再答：是时间状语从句部分+ 主句（all the - - - - ）.

英语问题：在特定的情景中,为什么by which time可以改成by the time when he came ba by which time英语问题 ,一道填空是这样的 he came back late,（by） which time all the guests h 翻译By the time he comes,I'll have left.( By the time he came, when与by the time的区别 BY THE TIME相当WHEN She had gone by the time he got back 其中的by the time 能用when 或 by which time和by the time 区别 by which time during which time since when from where的详细用法、以 He came back home in April,by which time his grandfather ___ By the time用法可以和when互换么? by the time 是否等于when by the time 的用法