1) 疑问代词在句中起名词词组的作用,用来构成疑问句。疑问代词有下列几个:
指人: who, whom, whose
指物: what
既可指人又可指物: which
2) 疑问代词在句中应位于谓语动词之前,没有性和数的变化,除who之外也没有格的变化。what, which, whose还可作限定词。试比较:
疑问代词:Whose are these books on the desk? 桌上的书是谁的?
What was the directional flow of U. S. territorial expansion? 美国的领土扩张是朝哪个方向的?
限定词:Whose books are these on the desk? 桌上的书是谁的?
What events led to most of the east of the Mississippi River becoming part of the United States?
哪些事件使密西西比河以东的大部分土地归属于美国?
说明1:无论是做疑问代词还是限定词,which 和 what 所指的范围不同。what所指的范围是无限的,而which则指在一定的范围内。例如:
Which girls do you like best? 你喜欢哪几个姑娘?
What girls do you like best? 你喜欢什么样的姑娘?
说明2:Whom是who的宾格,在书面语中,它作动词宾语或介词宾语,在口语中作宾语时,可用who代替,但在介词后只能用whom, 例如:
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