Which question word to use?
該用哪個疑問代詞？

We use who to ask questions about people:
我們用who問關(guān)于人的問題：

Who is that?

Who lives here?

Who did you see?

We use whose to ask about possession:
我們用whose問關(guān)于所有權(quán)的問題：

Whose coat is this? [or] Whose is this coat?

Whose book is that? [or] Whose is that book?

Whose bags are those? [or] Whose are those bags?

We use what to ask questions about things:
我們用what問關(guān)于事物的問題：

What is that?

What do you want?

We use which to ask someone to choose something:
我們用which問某人選擇某物的問題：

Which came first, the chicken or the egg?

I’ve got two books. Which do you want?

We can also use what and which with nouns:
我們也可以用what和which接名詞：

What subjects did you study at school?

What newspaper do you read?

Which newspaper do you read – the Times or the Guardian?

Which book do you want?

Which one is yours?

Questions with prepositions:
疑問代詞加介詞：

Questions ending in prepositions are very common in English. After Who, Which or What we often have a preposition at the end of the sentence:
以介詞結(jié)尾的疑問句在英語中很普遍。在Who, Which or What后面我們經(jīng)常以一個介詞來結(jié)尾：

Who does this book belong to?

What are you looking for?

Which university did you go to?

What country do you come from?