名词性从句I. !"#$%&一、定义名词性从句是在句子中起名词作用的句子。
它在复合句中能担任主语、宾语、表语、同位语，分别称为主语从句、宾语从句、表语从句和同位语从句。
二、分类&表语从句1) That is(系动词) a book.S + P 表语2) The fact is(系动词)that he has lied to usS + P 表语从句&宾语从句1) He said(vt) nothing at the meeting.S + P 宾语2) He said (vt) (that) he would help us without hesitation.S + P 宾语从句3) He is interested in (prep) what we want for breakfast.S + P 宾语从句&主语从句1) His mistakes made his teacher angry.主语+ P2) That he made so many mistakes made his teacher angry.主语从句P3)What he said made his teacher angry.主语从句P&同位语从句1) You can turn to my friend Tom for help.S + P 同位语2) The announcement that a new airport was to be built nearby made us excited.S 同位语从句+ P3) We heard the news that the war had broken out between America and Iraq.S + P 同位语从句三、引导词名称引导词在从句中担任成分连接词that, whether, if 不作成分连接代词what, whatever, who, whoever, whose, which, whichever 主语、宾语、表语、定语连接副词when, where, why, how, whenever, wherever, however 状语例如：a. He said that he would come.b. Whether he can pass the exam is not certain.c. He agrees with what I said.d. He agrees with what was said.e. I don’t know what present I should buy.f. That is where Tom used to live.g. That’s why he left.四、名词性从句语序名词性从句用陈述句语序。
名词性从句一．概述：在句子中起名词作用的各种从句统称为名词性从句。
根据它们在句中的语法作用，这类从句又可分为主语从句、表语从句、宾语从句和同位语从句。
二．名词性从句连接词1.连词（只起连接作用，不做成分）that没有实在意义，whether翻译为“是否”，可以引导各类名词性从句，可以和or,or not连用if翻译为“是否”，多引导宾语从句。
注意if跟whether的区别。
注：if“如果”还可以引导条件状语从句。
as if /though翻译为“好像”，在名词性从句中只能引导表语从句。
注：as if /though“好像”还可以引导方式状语从句。
because翻译为“因为”，在名词性从句中只能引导表语从句。
注：because“因为”还可以引导原因状语从句。
2.连接代词（既起连接作用，而且充当句子成分，都有各自的含义）who“谁”在从句中作主语，表语。
可引导各类名词性从句whom “谁”在从句中作宾语。
可引导各类名词性从句which“（特定范围内的）哪一个/些”在从句中充当主语，宾语，定语。
不引导同位语从句。
“什么，什么样的”有疑问含义。
在从句中充当主语，表语，宾语，定语。
what可以引导各类名词性从句“所…….的”或“…..的事物/东西/人/样子/地方等”。
无疑问含义，在从句中作主语，宾语，表语。
一般不引导同位语从句“多少”提问“价格，人口等”whose“谁的”在从句中作定语。
多引导宾语从句。
whoever“无论谁”无疑问含义。
在从句中作主语，表语。
引导名词性从句时在含义上相当于anyone who注：还可以引导让步状语从句。
此时可与no matter who 互换whomever“无论谁”无疑问含义。
在从句中作宾语。
引导名词性从句时在含义上相当于anyone whowhichever“（特定范围内的）无论哪一个/一些”无疑问含义。
在从句中作宾语，定语。
whatever“无论什么”无疑问含义。
在从句中作主语，表语，宾语，定语。
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。
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,whomever, whichever ；关系副词：when, where, how, why , however, whenever, wherever 等。
That you don’t like him is none of my business.你不喜欢她不管我的事。
What he said is true. 他说的是真的。
Do you remember how he arrived almost at the end of the party? 你记得他几乎是在宴会快结束时才到的吗？This party's really where it's at, man ! 啊，这个晚会真棒！T ell us how you fulfilled the heavy task ahead of schedule .告诉我们,你们是怎样提前完成这一艰巨任务的。
W e have reason to believe that the fighting on the border may develop into a full-blown war . (喻)我们有理由相信边境上的冲突可能发展成一场全面战争。
He said that he would come . 他说他要来。
足球比赛是否举行将视天气而定。
它位于主句中的连系动词之后。
引导表语从句的词有从属连词that 、whether 、等；关系副词when, where,why , how , however, whenever, wherever 等。
