名词性从句 在复合句中具有名词的性质的作主语、表语、同位语、宾语的从句叫名词性从句
因此,我们把主语从句、表语从句、同位语从句和宾语从句这四种从句统称为名词性从句
种类 作用 常用关联词 例句 主语从句 在复合句中做主语,相当于名词,一般置谓语之前,也可用it 作形式主语,主语从句放主句之后 that, whether, if, as if, as though, who, whose, which, how, when, where, why, what, whatever, whoever, wherever Whether he will come or not doesn’t matter much
Whoever comes here will be welcome
表语从句 在复合句中做表语,相当于名词,位于系动词之后 It looks as if it is going to snow
宾语从句 在复合句中做宾语,相当于名词 He asked me which team could win the game
同位语从句 放在名词之后(news, problem, idea, suggestion, advice, thought, hope, fact 等) 表明其具体内容 You have no idea how worried we are
The fact that he lied again greatly surprised us
主语从句(subject clauses)在复合句中起主语作用的从句叫主语从句
引导主语从句的词有从属连词、、关系代词、连接副词等
引导主语从句的关联词有从属连词that、whether,关系代词:who, what, which , whom, whose, whatever, whoever, whome