由于than既可用作连词也可用作介词,所以当后接人称代词时,可用主格也可用宾格.通常认为在正式文体中多用主格,在口语或非正式文体中多用宾语；后接动词用不定式还是-ing分词。

Everyone here is taller than I am.

这儿的每一个人都比我高.

Her sister swims faster than she does.

她姐姐游泳比她快.

I love you more than (he likes) him.

我爱你胜过爱他.