Which

意思是哪个；which在句中可作主语、表语、宾语、定语等成分；

1、作主语：

This is my bag,which is your’s?这是我的书包，哪个是你的？

2、作表语：

Which is your favorite subject?你最喜欢哪个科目？

I can’t tell which is which because they are so alike.我分辨不出谁是谁，因为他们太象了。

3、作宾语：

Which do you like best?你最喜欢哪一个？

4、作定语：

Which glasses do you want?你想要哪些杯子？

Which platform does the London train leave from? 去伦敦的火车从哪个站台开出？