高中英语四大名词性从句的详细概括以及注意点

1、名词性从句名词性从句主语从句主语从句宾语从句宾语从句表语从句表语从句 同位语从句同位语从句 It is said/reported/known/hoped/informed +that 从句从句It is said that he will come to China next year. 形式主语形式主语：WhatThatIt is said/reported/known/hoped/informed +that 从句从句 形式主语形式主语：The news that our team has won the match is true.同位语从句有时可以不紧跟在它所说明的名词后面，而是被别

2、的词隔开。例如：He got the news from Mary that the sports meeting was put off. 同位语从句一般跟在名词同位语从句一般跟在名词fact,newsfact,news, ,promise,truth,belief,thought,idea, promise,truth,belief,thought,idea, answer,information,knowledge,doubtanswer,information,knowledge,doubthope,law,opinion,plan,suggestionhope,law,opinion

3、,plan,suggestion后后面面, , 用以说明或解释前面的名词用以说明或解释前面的名词. .同位语从句同位语从句定语从句定语从句引导词that只起连接的作用不充当句子成不充当句子成分分引导词that除了引导句子外还充当一定的句子成充当一定的句子成分（主语或宾语）分（主语或宾语）同位语从句与前面的名词是同位关系表示这个名词的内容名词的内容定语从句对先行词起修饰作用，表示表示“的的”。同位语从句的that 不不能省略能省略而定语从句中的关系代词that，当其在从句中当其在从句中做宾语时，常省略做宾语时，常省略一.同位语从句注意点2. 在在have no idea 之后常用之后常用wh-引

4、导同位语从句引导同位语从句.I have no idea where he has gone.I have no idea when he did it.I have no idea what he did. 由连词由连词that 引导引导, that 常可省略。常可省略。I told him (that) I would come back soon. (1)并列第二个以上的宾语从句并列第二个以上的宾语从句,第二第二个个that 是不可以省略的是不可以省略的He said (that) he had finished reading this novel and that he would

5、borrow another one.that 不能省略。不能省略。It is strange that you like him.I think it strange that you like him.I feel it a pity that she cant come.He made it clear that he objected to the plan. 只能用只能用whether的情况：的情况：1）在不定式的前面）在不定式的前面 2）在介词后引导宾语从句时）在介词后引导宾语从句时 3）宾语从句中紧接）宾语从句中紧接or not时。时。 4）引导主语、表语、同位语从句时。）引导主

6、语、表语、同位语从句时。 I cant decide if to tell him the news .Theyre talking about if they will go.I wonder if or not I should invite him. whetherwhetherwhether If we will go there hasnt be decided. My question is if he will go with us. The question if he will go with us is still unknown. whetherwhetherwhethe

7、r注意：在条件状语从句中，表示注意：在条件状语从句中，表示“如果如果”时时用用if不用不用whether.由由wh-疑问词引导。疑问词引导。We fully understood what he meant.Go and ask why he was late yesterday.Please tell me which is mine.I asked how he was getting on.表语从句表语从句:结构结构:常见连系动词常见连系动词:连接词连接词:在复合句中充当表语的从句。在复合句中充当表语的从句。主语主语 + 连系动词连系动词 + 表语从句表语从句be, look, rema

8、in, seem, appearthat, wh-疑问词疑问词, whether, because, as, as if/ though The truth is that I didnt go there.1.表语从句里的引导词表语从句里的引导词that 是不可以是不可以省略的省略的 The question is whether he can get there. 2. 表语从句不能用表语从句不能用if引导引导All I want to know is that he need money.All I want to know is what he need.He is not what

9、he used to be.The question is when we start.Thats why we come here. 常用的还有常用的还有The reason is that 和和It is because 等结构。等结构。The reason for his absence is that hesuddenly fell ill. It is because he doesnt know her. thatas if他建议我们应该去北京他建议我们应该去北京He advised / suggested that we should go to Beijing. 他们要求我们去北京他们要求我们去北京They require that we should go to Beijing. 当动词当动词suggest, advise, require, demand等等 后面接宾语从句的时候宾语从句的谓语动后面接宾语从句的时候宾语从句的谓语动词用词用(should) + do.His suggestion is that we should go to Beijing.His suggest