by the time 什么意思 主句从句分别用什么时态 给几个例句 谢谢！
1.表示将来的时间。
主句用将来完成时，而从句用一般现在时来表示将来的动作。
如:I will have finishied the work by the time my father comes back.
2.表示模野过去的时间胡蔽。
主句用过去完成时，旦做喊而从句用一般过去时。
如：He had built a lab for himself by the time he was 12 years old.
by the time到…的时候
1. By the time we arrived the meeting was over.
我们到达时，会议已结束洞友了。
2. By the time I entered high school.
在我读高启颤派中悄贺之前。
3. It can stand the proof by the time.
它能经受时间的考验.