1. 这两句话并没有太大的区别.
2. 最多第二句强调了两个动作的先后关系而已,而在口语中用第一句就足够了.
再如:
You can go out to play if you finish your homework.
=You can go out to play if you have finished your homework.
1. 这两句话并没有太大的区别.
2. 最多第二句强调了两个动作的先后关系而已,而在口语中用第一句就足够了.
再如:
You can go out to play if you finish your homework.
=You can go out to play if you have finished your homework.