which的用法
1.(用作疑問(wèn)代詞)哪一個(gè),哪一些
Which is my seat?
哪個(gè)座位是我的?
2.(用做關(guān)系代詞)那一個(gè),那一些
He also had a gun with which to defend himself.
他還有一把自衛(wèi)用的槍。
He invited us to dinner, which was very kind of him.
他邀請(qǐng)我們吃晚飯,他這么做真是太客氣了。
She was very fond of speaking French, which indeed she spoke well.
她很喜歡講法語(yǔ),而且確實(shí)講得不錯(cuò)。
He lives in the house which is opposite ours.
他住在我們對(duì)面的那棟房子里。
which作為形容詞用法如下
1.(用作疑問(wèn)形容詞)哪一個(gè),哪一些
Which university did you go to, Oxford or Cambridge?
你上過(guò)哪所大學(xué)?牛津還是劍橋?
2.(用作關(guān)系形容詞)這個(gè),這些
The doctor told him to give up smoking, which advice he took.
醫(yī)生叮囑他戒煙,他接受了這一忠告。
其他用法
1、在后置的非限制性定語(yǔ)從句中代替上文出現(xiàn)的事物或情況（單數(shù)或復(fù)數(shù)）。
2、在問(wèn)句中作為疑問(wèn)代詞，在名詞從句中作為連接代詞用，其含義為“哪個(gè)、哪些”。
3、如果非限制性定語(yǔ)從句的先行詞不是指主句內(nèi)容，而是指具體的人、時(shí)間、地點(diǎn)，則不用which。