- 1.
[疑问代词] 哪个，哪一个，哪一些 -
• Which is bigger? 哪一个大? - 2.
[限制性关系代词] …的(那个〕，…的(那些〕 -
• There were few eggs which weren't broken. 没破的鸡蛋没几个。 -
• Houses which overlook the lake cost more. 俯瞰湖面的房子更贵一些。 - 3.
[非限制性关系代词] 那个，那些，那事 -
• The clock, which my grandfather bought,is still in good order. 这座钟是我祖父买的，现在还走得很准。 - 4.
[省略先行词的关系代词] …的那个(或那些)，…的任何一个 -
• You can select which you like. 你可以随便挑自己喜欢的。