Question

by the time 的时态怎么用

Answer 1

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.表示过去的时间.

主句用过去完成时,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.