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.
by 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.