疑問(wèn)代詞包括what， which， who， whom， whose， 可以用來(lái)構(gòu)成特殊疑問(wèn)句，也可以引導(dǎo)名詞從句。 What， which， who在句子中作主語(yǔ)或賓語(yǔ)，whom作賓語(yǔ)，whose作定語(yǔ)。如：

　　Who is speaking? (主語(yǔ))

　　Which do you prefer， the yellow one or the white one? (賓語(yǔ))

　　Whats your sister?(表語(yǔ))

　　The man who is talking with my mother is an engineer。(引導(dǎo)定從句)

　　The old man whose son is studying abroad is our formal dean of the department. (引導(dǎo)定從句)

　　This is the plane which will fly to Wuhan this afternoon. (引導(dǎo)定從句)

　　I dont remember whom I have lent my dictionary to. (引導(dǎo)賓語(yǔ)從句)

　　疑問(wèn)代詞what， which， who， whom后面可以加ever來(lái)加重語(yǔ)氣。如：

　　Whoever can be calling at this time of the night ?誰(shuí)這么深更半夜來(lái)找人？

　　Ill say whatever comes into my head。

　　Take whichever book you like。