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专题十 名词性从句 一、概念 定义：在句子中起名词作用的句子叫名词性从句 (Noun Clauses)。 名词性从句在复合句中能担任：主语、宾语(介词宾语)、表语、同位语，因此，根据它在句中不同的语法功能，可分为：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接词可分为三类： 1．连接连词：that, whether, if, as if和because。 that引导名词性从句时，在主从句中不可以充当任何句子成分，也没有任何含义。 The fact is that we have lost the game. The reason why he was late was that he missed the train this morning. He has told me that he will go to Shanghai tomorrow. It looks as if it is going to rain. It happened that I went out last night. It is known to us how he became a writer. Whether there is life on the moon is an interesting question. Everything depends on whether we have enough money. 2．连接代词：what, whatever, who, whoever, whom, whose和which。 注意：what引导名词性从句时，在主从句中都要充当一定的句子成分，what可以分解成定语从句中的先行词＋关系代词即常说的先行词＋ that。 | 
