for后加什么格

for是介词,其后跟代词的宾格。 作介词宾语。

例句：

I took her classes for her while she was sick.

她生病时我为她代课。

扩展资料

for：

prep.(表示对象、用途等)给，对，供;以帮助;为了;关于；

conj.因为;由于；

例句：

Day care is provided by the company she works for.

她工作的那家公司有日托。

He had to go to hospital for treatment.

他不得不去医院接受治疗。

There aren't enough books for everyone to have one each.

书不够给每人发一本。

Respect for life is a cardinal principle of English law.

尊重生命是英国法律最重要的原则。