高一英语名词性从句-江苏教育版.pptVIP

名词性从句Noun clauses 名词性从句是由if, whether, that 和各种疑问词充当连接词所引导的从句，其作用同名词一样。包括 主语从句，宾语从句，表语从句和 同位语从句。 一．主语从句　　主语从句是在复合句中充当主语的从句，通常放在主句谓语动词之前或由形式主语it代替，而本身放在句子末尾。1. It 作形式主语和it引导强调句的比较 It 作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。而it引导的强调句则是对句子某一部分进行强调，无论强调的是什么成分，都可用连词that。被强调部分指人时也可用who。例如：　　It is a pity that you didn’t go to see the film.　　It doesn’t interest me whether you succeed or not.　　It is in the morning that the murder took place.(=In the morning the murder took place.)　　It is John that broke the window. (=John broke the window.) 2. 用it 作形式主语的结构(1) It is ＋名词＋从句　　It is a fact that …　　事实是…　　It is an honor that　…非常荣幸　　It is common knowledge that　　　　是常识(2) It is ＋形容词＋从句　　It is natural that…　　　 很自然…　　It is strange that…　　　奇怪的是… (3) It ＋不及物动词＋从句　　It seems that…　　　　 似乎…　　It happened that…　　　　　 碰巧…(4) It ＋is/was+过去分词＋从句　　It is reported that…　　　　　据报道…　　It has been proved that…　　已证实…It is said/thought/hoped/told/believed +that…. 3. 主语从句不可位于句首的五种情况　 　 (1) It is said , (reported) …结构中的主语从句不可提前。例如：It is said that President Bush will visit our country next week. (right)That President Jiang will visit our school next week is said. (wrong)(2) It happens that.., It occurs that… 结构中的“that”从句不可提前。例如：It occurred to him that he failed in the examination. (right)That he failed in the examination occurred to him. (wrong) (3) It doesn’t matter how/whether …结构中的主语从句不可提前。例如：It doesn’t matter whether he is wrong or not. (right)Whether he is wrong or not doesn’t matter. (wrong)(4) 含主语从句的复合句是疑问句时，主语从句不可提前。例如：Is it likely that it will rain in the evening? (right)Is that will rain in the evening likely? (wrong)  4. what 与that 在引导名词性从句时的区别　　what 引导名词性从句时在从句中1）充当句子成分（主、宾、表）；2）本身有词义。而that 1）只起连接作用；2）本身没有词义；3）不在从句中担任成分。For example:1) What you said yesterday is right.(=All that you .2) That she is still alive is a puzzle. 你昨天说的话是对的。 她仍活着是一个谜。 二．宾语从句宾语从句就是在复合句中作宾语的名词性从句，通常放在主句谓语动词（及物动词）或介词之后。1. 作动词的宾语(1) 由