名词性从句在句子中起名词作用的句子叫名词从句 (Noun Clauses）。 名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。引导名词性从句的连词：that, what, which, who, whom, whose, if , whether, when, where, why, how, how many, how long, how far, whatever, whenever, wherever, however, 主语从句：What you said sounds reasonable. 表语从句：This is what I was asked to do.宾语从句：Nobody knows who broke the glass.同位语从句：The idea that well go out for a picnic is great 名词性从句应注意事项：1、 从句的语序为陈述句;
