which可以引导定语从句,宾语从句,主语从句。
例如：
1、I bought a room yesterday,which used to belong to Tom.(定语从句）
2、I don't know which one I should buy.（宾语从句）
3、Which bus we should take is still a question.(主语从句）
4、Those which are on the desk are English books. （定语从句）
5、This is the factory in which we once worked. （定语从句）
1、which基本解释：
1）pron.哪个, 哪几个, ...的, ...那个
2）adj.哪个
2、音标：英 [wɪtʃ] 美 [(h)wɪtʃ]
3、造句举例：
1）Which is the largest? 哪一个最大?
2）Which of you will go with me?你们哪一个跟我一起去?
3）That is the parcel which came this morning.那就是早上送来的包裹。
4）I said nothing, which made him still more angry.我一声不响, 这就使他更加生气。
5）Choose which you like best.选你最喜欢的吧习惯用语。
6）which is which?哪一个是哪一个。