名词性从句名词性从句 在句子中起名词作用的句子叫名词从在句子中起名词作用的句子叫名词从句 句 ((Noun ClausesNoun Clauses ）。 ）。 名词从句的名词从句的功能相当于名词词组功能相当于名词词组 , , 它在复合句中它在复合句中能担任能担任主语主语、、宾语宾语、、表语表语、、同位语同位语等，等，因此根据它在句中不同的语法功能，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名词从句又可分别称为主语从句、宾主语从句、宾语从句、表语从句语从句、表语从句和和同位语从句。同位语从句。 名词性从句主语从句宾语从句表语从句 同位语从句 引导主语从句的关联词有三类：(1) 从属连词that 。 That they were in truth sisters was clear from the facial resemblance between them.很明显，她们确是亲姐妹，她们的脸型很相似。(2) 从属连词whether 。Whether he’ll come here isn’t clear. 他是否会来这里还不清楚。(3) 连接代词 who, whom, whose, what, which, whoever, whatever, whichever连接副词 where, when, how, why 。What she did is not yet known. 她干了什么尚不清楚。How this happened is not clear to anyone. 这事怎样发生的，谁也不清楚。Whoever comes is welcome. 不论谁来都欢迎。Wherever you are is my home ---- my only home. 你所在的任何地方就是我的家 ---- 我唯一的家。 1 ． 主语从句能用it 作形式上的主语。常以 it 作形式主语的句型：A. It+be+ 形容词 (obvious, true, wonderful, natural, surprising, good, funny, possible, likely, certain, probable, etc.)+that 从句。It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。 B. It+be+ 名词词组(no wonder, no surprise, an honor, a good thing, a pity, etc.)+that 从句。It’s a pity that we can’t go. 很遗憾我们不能去C. It+be+ 过去分词 (said, reported, thought, expected, decided, announced, arranged, etc.)+that 从句。It is said that Mr. Green has arrived in Beijing. 据说格林先生已经到了北京。It is reported that China has sent another man-made earth satellite into orbit. D. It+seem, happen 等...
