九年级英语知识点整理：连接代词

九年级英语知识点整理：连接代词

连接代词的用法
1. 连接代词主要包括who, whom, what, which, whose, whoever, whatever, whichever, whosever 等，它们在句中可用作主语、宾语、表语、定语等(但who, whom, whoever 等不用于名词前作定语)，主要用于引导主语从句、宾语从句和表语从句等。
如：
Ask him which he wants. 问他要哪一个。(which引导宾语从句)
The question is who can help us. 问题是谁能帮助我们。(who引导表语从句)
What he says sounds reasonable. 他说的话听起来有道理。(what引导主语从句)
2. 关系代词型 what 的用法。
比较下列两句：
I don't know what you like. 我不知道你喜欢什么。
You can get what you like. 你想要什么就可得到什么。
第一句中的 what 表示"什么";第二句中的 what 则具有关系代词的性质，相当于"先行词+关系代词"，表示"…所…的一切事或东西"，如上面第二句的 what就相当于 everything that。顺便说一句，如第二句这样用的 what 有时还可后接一个名词。
如：
We gave him what (little) help(此处help为名词) we could. 我们给了他我们力所能及的帮助。
3. whatever, whoever与whichever的用法：它们可用于引导主语从句和宾语从句，也可用于引导让步状语从句。如：
Whoever comes will be welcome. 任何人来都欢迎。(whoever引导主语从句)
Whatever she did was right. 她做的一切都是对的。(whatever引导主语从句)
Whoever you are, you can't enter. 不管你是谁，都不能进去。(whoever引导让步状语从句)
Whichever side wins, I shall be happy. 不管哪边赢，我都会高兴。(whichever引导让步状语从句)

所谓连接代词，指的是用于引导名词性从句或不定式的代词。
1. 引导名词性从句的连接代词：比较常见的有 what, which, who, whom, whose, whatever, whoever, whomever, whichever等。如：
It is clear enough what he meant. 他是什么意思很清楚。(what引导主语从句)
Ask him which he wants. 问他要哪一个。(which引导宾语从句)
The problem is who can be put in charge of the work. 问题是谁能来负责此事。(who引导表语从句)
Whoever comes will be welcome. 任何人来都欢迎。(whoever引导主语从句)
Buy whichever is cheapest. 买最便宜的。(whichever引导宾语从句)
I’ll just say whatever comes into my head. 我将想到什么说什么。(whatever引导宾语从句)
2.连接代词除用于引导名词性从句外，有时也可引导不定式。如：
I ask him what to do. 我问他该怎么办。
Show me what to do. 给我说说该做什么。
Did you ask her which to buy? 你问没问她该买哪一个?
He doesn’t know whom to believe. 他不知该相信谁。
这类用法通常可视为名词性从句的省略。如：
I wonder who to invite. =I wonder who I should invite. 我拿不定该邀请谁。