代詞
3、無論是做疑問代詞還是限定詞，which 和 what 所指的范圍不同。what所指的范圍是無限的，而which則指在一定的范圍內，例如：
Which girls do you like best?
你喜歡哪幾個姑娘?
What girls do you like best?
你喜歡什么樣的姑娘?
4、who通常作主語和表語，whom作賓語，例如：
Who is to take the chair? 誰做主席?
Who is speaking? 是哪一位(打電話)?
Who(m) did you meet on the street?
你在街上遇到了誰?(作動詞賓語)
Who(m) are you taking the book to?
你要把這書帶給誰?(作介詞賓語，置句首)
To whom did you speak on the campus?
你在校園里和誰講話了?(作介詞賓語，置介詞 后，不能用who取代。)
5、Whose, what, which這三個疑問代詞可以用作：
(1) 主語：
What happened next? 后來怎么樣了呢?
Whose is better? 誰的好一些?
Which is yours? 哪是你的?
