1、在复合句中起名词作用的从句叫做名词性从句。名词性从句主语从句 表语从句 宾语从句 同位语从句 1.You know that I am a teacher of English.2. That I am a teacher of English is known to you all .3. It is known to you all that I am a teacher of English.4. The fact that I am a teacher of English is known to you all.5. I am worried about whether you ca
2、n do well in the exam. 6. What I am worried about is whether you can do well in the exam.that I am a teacher of EnglishThat I am a teacher of Englishthat I am a teacher of Englishwhether you can do well in the exam.Object ClauseSubject ClauseSubject Clause Predicative ClauseAppositive Clausethat I a
3、m a teacher of Englishwhether you can do well in the exam.Object ClauseFind the clauses and tell the function of them:Subject ClauseWhat I am worried about连接代词 who, whom, whose, which, what, whatever连接副词 how, why, when, where however, wherever连接词 that, whether, if, becauseas if /as though（ 不充当从句的任何成
4、分） 引导名词性从句的关联词在名词性从句中一律用陈述句的语序，即使从句表达的是疑问含义。 The problem is what he has done to the little boy. 问题是他对那个小男孩做了些什么。 1. 主语从句在句中作主语的句子叫主语从句。 主语从句通常由从属连词 that，whether 和连接代词 what, who, which, whatever, whoever以及连接副词 how,when,where, why等词引导。that在 从句中 无词义 ，只起连接作用； 连接代词 和 连接副词 在句中既保留自己的疑问含义、又起连接作用，在从句中 充当成分。
5、What he wants to tell us is not clear. 他要跟我们说什么，还不清楚。Who will win the match is still unknown. Where the English evening will be held has not yet been announced. That he stole a bike was true. 有时为避免句子头重脚轻，常用 it 代替主语从句作形式主语放于句首，而把主语从句置于句末。主句的谓语动词一般用单数形式。常用句型如下：1） It + be + 名词 + that从句It is still a question whether she will come or not.2） It + be + 形容词 + that从句It is strange that you should like it. 3） It + 不及物动词 + that 从句 It seems that he is quite honest. 同类结构： It seems / appears that 好象；似乎 It turned out that 结果是 It doesnt matter whether 是否 都没关系 It makes no difference whether 是否 毫无区别
