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when和by the time用在过去完成时有什么区别?

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/07/14 16:56:27
when和by the time用在过去完成时有什么区别?
y the time是从前面的时间开始一直到那个时间点的状态
when则只是表述那个时间点的动作或状态.
by + 过去的时间点.如:I had finished reading the novel by nine o'clock last night.
When I woke up,it had already stopped raining.