by the time和when 能互换吗不是都有 当那时 的意思吗

by the time 何时和when 互换 By the time用法可以和when互换么?两个都能表示“当.”么? by the time和when 能互换吗不是都有 当那时 的意思吗 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 via 和by能互换吗? land和arrive有什么区别What were you doing when the UFO( landed ).The plane( arrived )at the right time.我觉得两个都可以互换填,谁能给我解释下啊 when与by the time的区别 by which time和by the time 区别两个都能引导从句,有什么不同 all the time 能与always互换么 the moment和when在哪个从句里可互换. when和by the time用在过去完成时有什么区别? by the time 和when...用法一样吗,意思一样吗 by the time 和when的区别(主句从句分别用什么时态) when he got there ,the train had alreadly left...能改为by the time i got there. I will be here all the time和i will still be here.有啥区别?那 it still rain.和 it rain all the time.我老觉得still和all the time有时候能互换 by the time 是否等于when by the time 的用法when与 by the time 是分开的啊 不要看错了 by the time of和by the end of by the time 的意思和用法.