做状语时只能修饰时间或者条件:
1 When / If compared with you,Mary doesn't look that nice or pretty at all.
在与你相比时/ 如果与你相比,Mary就不那麼漂亮了.
2 When / If comparing myself with you ,I find that I leave much to be desired in my English study
如果 / 在 与你相比,我的英语学习还有许多要努力.
做谓语时强调动作:
1 We always compare ourselves with others so that we won't be left behind the time.
我们经常将自己与他人相比,这样我们就不会落後於时代.