什么叫連接代詞？所謂連接代詞，指的是用于引導(dǎo)名詞性從句或不定式的代詞。
1. 引導(dǎo)名詞性從句的連接代詞：比較常見的有 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引導(dǎo)主語(yǔ)從句)
Ask him which he wants. 問(wèn)他要哪一個(gè)。(which引導(dǎo)賓語(yǔ)從句)
The problem is who can be put in charge of the work. 問(wèn)題是誰(shuí)能來(lái)負(fù)責(zé)此事。(who引導(dǎo)表語(yǔ)從句)
Whoever comes will be welcome. 任何人來(lái)都?xì)g迎。(whoever引導(dǎo)主語(yǔ)從句)
Buy whichever is cheapest. 買最便宜的。(whichever引導(dǎo)賓語(yǔ)從句)
I’ll just say whatever comes into my head. 我將想到什么說(shuō)什么。(whatever引導(dǎo)賓語(yǔ)從句)
2. 連接代詞除用于引導(dǎo)名詞性從句外，有時(shí)也可引導(dǎo)不定式。如：
I ask him what to do. 我問(wèn)他該怎么辦。
Show me what to do. 給我說(shuō)說(shuō)該做什么。
Did you ask her which to buy? 你問(wèn)沒問(wèn)她該買哪一個(gè)?
He doesn’t know whom to believe. 他不知該相信誰(shuí)。
這類用法通?？梢暈槊~性從句的省略。如：
I wonder who to invite. =I wonder who I should invite. 我拿不定該邀請(qǐng)誰(shuí)。