"疑問(wèn)代詞有who(誰(shuí)，主格)，whom(誰(shuí)，賓格)，whose(誰(shuí)的，所有格)，what(什么)和which(哪個(gè)，哪些)等。
疑問(wèn)代詞用于特殊疑問(wèn)句中
疑問(wèn)代詞一般都放在句首，并在句中作為某一句子成分。如：
Who is going to speak to us tomorrow?明天誰(shuí)來(lái)跟我們講話?(who作主語(yǔ))
Who told you so?是誰(shuí)告訴你的?(who作主語(yǔ))
Whom are you talking about ?你們?cè)谡f(shuō)誰(shuí)?(whom作賓語(yǔ)，但在句首時(shí)口語(yǔ)常用who代替whom)
Whose umbrella is this ?這是誰(shuí)的傘?(whose作定語(yǔ))
What is that? 那是什么?(what作表語(yǔ))
What did he say?他說(shuō)什么?(what作賓語(yǔ))
Which is yours，the blue pen or the redone?藍(lán)筆和紅筆哪一支是你的?(which作主語(yǔ))
[注一]關(guān)于疑問(wèn)代詞的各種用法，可參看77.70-77.72。
[注二]疑問(wèn)代詞who，what，which等后面加單詞ever，可強(qiáng)調(diào)語(yǔ)氣，表達(dá)說(shuō)話人的各種感情。如：
What ever do you want?你到底想要什么?
Who ever is she looking for ?她究竟是在找誰(shuí)?
[注三]which表示在一定范圍之內(nèi)的選擇，what則沒(méi)有這種限制。如：
What do you usually have for lunch?你們午飯通常吃些什么?
Which do you like best?你最喜歡哪一個(gè)?
Which of you comrades come from the Northeast? 你們同志們中間誰(shuí)是東北人?
疑問(wèn)代詞可以引導(dǎo)一個(gè)間接疑問(wèn)句
間接疑問(wèn)句在句中可用作主語(yǔ)、賓語(yǔ)、表語(yǔ)等。疑問(wèn)代詞本身在間接疑問(wèn)句中又擔(dān)任一定的句子成分。如：
Who will be in charge of the work is still not decided.誰(shuí)將負(fù)責(zé)這項(xiàng)工作，現(xiàn)在還沒(méi)有決定。(疑問(wèn)代詞who引導(dǎo)一個(gè)主語(yǔ)從句，它本身又在從句中用作主語(yǔ)。)
Do you know what his name is?你知道他叫什么名字嗎?(疑問(wèn)代詞what引導(dǎo)一個(gè)賓語(yǔ)從句，而它本身又在從句中用作表語(yǔ)。)
[注一] what所引導(dǎo)的名詞性從句(即主語(yǔ)從句、賓語(yǔ)從句、表語(yǔ)從句) 有時(shí)不是間接疑問(wèn)句。如：
What he says is quite true.他所講的話很對(duì)。(what相當(dāng)于that which。它引導(dǎo)一個(gè)主語(yǔ)從句，這個(gè)從句不是間接疑問(wèn)句。)
Children do what the nurse tells them to do.保育員讓孩子干什么他們就做什么。(what引導(dǎo)一個(gè)賓語(yǔ)從句，這個(gè)從句也不是間接疑問(wèn)句。)
[注二] whatever，whoever，whichever等詞可引導(dǎo)名詞性從句。這些名詞性從句也不是間接疑問(wèn)句。whatever，whoever，whichever也可引導(dǎo)表示讓步的狀語(yǔ)從句。見(jiàn)15.65和15.72)如：
They eat whatever they can find.他們找到什么就吃什么。(whatever引導(dǎo)一個(gè)賓語(yǔ)從句，并在從句中作賓語(yǔ)。)
I've got plenty of books 1eft.Whoever wants an extra copy can get one from me.我還剩下許多書(shū)，誰(shuí)還想再要一本可來(lái)拿。(whoever引導(dǎo)一個(gè)主語(yǔ)從句，并在從句中作主語(yǔ)。)