adj.哪一个；哪一些

pron.哪一个；哪些

which用作疑问代词时,在特殊疑问句中用作宾语或主语。

which用作关系代词,可引导限制性定语从句或非限制性定语从句,引导非限制性定语从句时which可以用整个主句作为其前行词,相当于and that,有时还可引导不定式短语从句。

which也可用作疑问限定词或关系限定词。例如:Which foreign language have you studied?你学了哪门外语?We told him to consult a doctor,which advice he took.我们叫他去看医生,他接受了这个意见。Let me know which train you'll be arriving on.告诉我你要坐哪一趟车来。