名词性从句_语法讲解
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名词性从句1.从句的分类状语从句(分9种)从句主语从句名词性从句宾语从句表语从句同位语从句2.说明:①名词性从句的功能相当于名词,根据其在句中充当的成份,有不同的叫法。
②引导名词性从句的词语主要有:a.从属连词that,无词义,不作句子成分;b.从属连词if,whether(是否)有词义,但不作句子成分;c.从属连词as if(=as though,似乎、好像)有词义,但不作句子成分;d.连接代词who,whoever,what,whatever,whom,whomever,which,whichever,how much,how many有词义,作成分;e.连接副词when,whenever,where,wherever,why,how,however,how often,how soon,how far,how long作句子成分。
③在名词性从句中,要用陈述语序。
【例】1.I don’t kno w where does he live.(false)I don’t know where he lives.(true) 我不知道他住在哪。
2.What life in the future will be like is unknown.(true)What will life in the future be is unknown.(false)④不可用no matter who,no matter what等引导名词性从句,只能引导状语从句。
一、主语从句1.定义:若处在主语的位置上是个句子,那么这个句子就叫做主语从句。
2.注意事项:a.在主语从句中,任何引导词都不可以省去。
【例】That her hair is turning grey worries her.b.在主语从句中,不用if,用whether。
【例】Whether he will come or not is not clear.(true)If he will or not is not clear.(false)c.主语从句作主语时,谓语动词用单数。
语法解析名词性从句一、概念说明名词性从句是从句的一种,它在句中的地位和作用相当于名词。
名词性从句可以充当主语、宾语、表语或同位语。
二、主语从句主语从句用来充当整个句子的主语。
示例:1. What she said is true.(主语从句作主语)2. Whether he will come is uncertain.(主语从句作主语)3. If it rains, we will stay at home.(主语从句作主语)三、宾语从句宾语从句用来充当及物动词或介词后面的宾语。
示例:1. She asked me what my name was.(宾语从句作宾语)2. I wonder if he is coming.(宾语从句作宾语)3. He told me where he lived.(宾语从句作宾语)四、表语从句表语从句用来充当系动词后面的表语。
示例:1. The important thing is that we keep trying.(表语从句作表语)2. His wish is that everyone be happy.(表语从句作表语)3. Her dream is to become a famous singer.(表语从句作表语)五、同位语从句同位语从句用来解释或说明名词的具体内容。
示例:1. The fact that he didn't study resulted in a poor grade.(同位语从句解释the fact)2. My understanding is that we need to work together.(同位语从句解释my understanding)3. The idea that she suggested is worth considering.(同位语从句解释the idea)六、关系代词引导的名词性从句关系代词引导的名词性从句在从句中充当成分的同时,引导词也在主句中充当成分。
英语语法与词汇详解名词性从句一、什么是名词性从句?①在句子中起名词作用的句子叫名词性从句。
②相当于名词词组,它在复合句中能担任主语、宾语、表语、同位语、介词宾语等。
③名词性从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。
二、主语从句①作句子主语的从句叫主语从句。
②通常由从属连词that,whether, if和连接代词what, who, which, whatever, whoever以及连接副词how, when, where, why等词引导。
③that在句中无词义,只起连接作用,但不可省略④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,在从句中充当从句的成分。
⑤例句:->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.[谁能赢得这场比赛还不得而知。
]->It is known to us how he became a writer.[我们都知道他是如何成为一名作家的。
]->Where the English evening will be held has not yet been announced.[英语晚会将在哪里举行,还没有宣布。
]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。
常用句型有:->It+be+名词+that从句->It+be+形容词+that从句->It+be+动词的过去分词+that从句->It+不及物动词+that从句三、宾语从句①用作宾语的从句叫宾语从句。
②引导宾语从句的关联词与引导主语从句和表语从句的关联词大致一样,在句中可以作谓语动词或介词及非谓语动词的宾语。
③由连接词that引导宾语从句时,that在句中不担任任何成分,在口语或非正式的文体中常被省去,但如从句是并列句时,第二个分句前的that不可省。
名词性从句名词性从句包括主语从句、宾语从句、表语从句和同谓语从句。
一、连接词连接代词:that, what, who,which, whom,whose, whatever, whoever, whichever等连接副词:whether, how, why, when ,where, wherever等二、连接代词(除that外)和连接副词在名词性从句中都有词义,它们除了引导名词性从句外,还在从句中充当成分,即做主语、宾语、表语、定语和状语。
Who will go there is not important.Where she has gone hasn’t been known yet.I don’t know what I should do.He asked whose dictionary it was.Please tell me when we shall discuss our work plan.I have no idea how soon they are coming.要注意以下几点问题:1、连接代词‘that’的用法:在名词性从句中that 无词义,在从句中不充当任何句子成分,只起连接从句的作用,在宾语从句中,that在口语中可以省略。
但在引导主语从句时不能省略。
That he was chosen made us very happy.We heard the news that our team had won.The truth is that he is the best in his class.He said (that) he would see me the next week.2、引导宾语从句的that可省略,但及物动词后有两个宾语时,可省略第一个that, 不省略第二个that;如有形式宾语时,连接真正宾语的that 不能省略。
They made it a rule that they got up at six every day.3、由连词that引导的名词从句很少做介词的宾语,只在except, but , besides介词后看到,其他一些介词的宾语从句如果由连词that 引导,需用it作形式宾语。
名词性从句详解名词性从句包括主语从句、表语从句、宾语从句、同位语从句。
其关联词有连接词that,if,whether;疑问代词who,what,which和疑问副词when,where,how,why等。
一.语法讲解1.主语从句主语从句在句中做主语。
它可以放在主句谓语动词之前,但多数情况由it作形式主语,而把主语从句放在主句之后。
例如:Who did that is known to all.It is interesting that you should like him.2.表语从句表语从句在句中作表语,位于主句中的系动词之后。
如:The question is who can complete the difficult task.表语从句不能用if引导,但可用as if引导。
例如:He looked as if he was going to cry.3.同位语从句同位语从句跟在名词后面,进一步说明该名词的具体内容。
引导同位语从句的名词主要有fact,news,promise,idea,truth等。
连接词用that(不用which),及连接副词how,when,where,why等。
例如:His delay is due to the fact that the car went wrong halfway.The news that our team has won the match is true.She asked the reason why there was a delay.4.宾语从句1.宾语从句在句中作及物动词或介词的宾语。
例如:We can learn what we did not know.He will talk to us about what he saw in the U.S.如果主句的谓语动词是及物动词make,find,see,hear等,则把宾语从句置于宾语补足语之后,用it作为形式宾语。
名词性从句的语法解析名词性从句是指在句中充当名词的成分的从句,可以作主语、宾语、表语、同位语等。
名词性从句的引导词有“从属连词”和“连接代词”两种。
一、主语从句主语从句在句中充当主语,常引导主语从句的连接词有“that”和“whether/if”。
其中,“that”在口语中常省略,而“whether/if”则一般用于句中有“or not”时。
例如:1. That he passed the exam is good news.(非正式:He passed the exam is good news.)2. Whether he will come to the party is still uncertain.(非正式:If he will come to the party is still uncertain.)二、宾语从句宾语从句在句中充当宾语,常引导宾语从句的连接词有“that”、“whether/if”、“what”和“who/whom”。
其中,“that”在口语中常省略。
例如:1. She said that she would go shopping later.(非正式:She said she would go shopping later.)2. I don't know whether/if he is coming to the party.(非正式:I don't know if he is coming to the party.)3. She asked me what I wanted for dinner.4. He asked who/whom I was talking to on the phone.三、表语从句表语从句在句中充当表语,常引导表语从句的连接词有“that”、“whether/if”和“what”。
例如:1. The important thing is that we are safe.(非正式:The important thing is we are safe.)2. The question is whether/if he will pass the exam.3. The problem is what we should do next.四、同位语从句同位语从句通常用来进一步解释说明某个名词或代词指代的内容,引导同位语从句的连接词有“that”、“whether/if”、“what”、“who/whom”等。
高考英语名词性从句语法知识点讲解主语从句宾语从句表语从句同位语从句作及物动词宾语作介词宾语that一般不省略可以省略一般不省略一般不省略一般不省略Whether/if(是否)放于句首时只用whether用whether/if均可,但有区别只用whether只用whether只用whether特殊疑问词注意语序要用陈述语序名词性关系从句注意语序要用陈述语序一、that 从句1、主语从句(1)that从句作主语时,常用it作形式主语,常见的句型有:It+be+形容词(obvious, true, natural,surprising,good,wonderful,funny,possible,likely,certai n,probable,etc.)+that从句It+be+名词词组(no wonder, an honor, a good thing, a pity, no surprise, etc.)+that从句It+be+过去分词(said, reported, thought, expected, decided, announced, arranged, etc.)+that从句(2)that可以省略,但that从句位于句首时,that不能省略。
2、宾语从句(1)常见的可以接that从句作宾语的动词有see, say, know, imagine, discover, believe, tell, show, think, consider, be sure, be afraid等。
在可以接复合宾语的动词之后,如think, make, consider等,可以用it作形式宾语。
(2)That从句一般不能充当介词宾语,偶尔可作except, in 的宾语。
3、表语从句(that不可省略)4、同位语从句连词that引导同位语从句时,应在某些抽象名词之后,如:fact, hope, desire, thought, suggestion, idea, news, problem, possibility等,对前面的名词起补充说明的作用,that在从句中不担当任何成分,不能省略。
名词性从句一、名词性从句的基本概念在复合句中起名词作用的从句叫名词性从句,包括作主语从句、表语从句、宾语从句和同位语从句。
(1)主语从句就是在复合句中作主语的从句。
主语从句常用that, whether, who, whom, whose, what, which, when, where, how, why, whatever, whoever等引导。
如:Whether he will be able to come remains a question. 他是否来还是问题。
That China is a great socialist country is well known. 众所周知,中国是一个伟大的社会主义国家。
注:为避免头重脚轻,使句子平衡,常用it作形式主语,而将主语从句后置。
如上述第二例常说成:It is well known that China is a great socialist country.但是,由连接代词what, whatever, whoever等引导的主语从句一般不能用形式主语。
如:What he found surprised me greatly. 他的发现使我非常吃惊。
Whoever is finished may rest. 凡是做完工的人都可以休息。
(2)表语从句就是在连系动词之后作表语的从句。
引导表语从句的连接除与引导主语从句的连接词外,还有as if,as though。
如:The question is whether he is able to do it alone. 问题是他能否单独做这件事。
It looks as if (though) it is going to snow. 天好像要下雪似的。
注意:要区分以下句式:1. that’s why+结果;that’s because+原因。
2. the reason why /for…is that…He is absent. That’s because he is ill. 他缺席,这是因为他生病了。
名词性从句宾语从句1、连接代词:who, whose, whom, what, which。
在从句中担任成分,如主语、表语、宾语、或定语等。
2、连接副词:when, where, why, how。
在从句中担任成分,作状语。
3、连词:that, whether, if, as if。
在从句中不担任成分,注意:引导词的作用:1 连词whether 和if(是否),as if(好象)只有连接的功能,而不在从句中充当句子成分。
that作连接词,本身无任何含义。
2. 连接代词和连接副词不但有连接的功能,同时还要在从句中充当一定的句子成分,如主语、宾语、表语、定语、状语宾语从句:从句在句中充当宾语的成分。
宾语从句可作谓语动词的宾语,也可作介词的宾语,还可作某些形容词的宾语从句。
一般由that, whether, if, who, whose, what, which, when, where, how, why 等连接Jenny thought (that) her teacher was unfair.I’d like to know which one is your husband.I am sure (that) he won’t mind.He said that he was doing his homework. (注意时态的对应)Mother told me that she would buy a bike for me.I don’t know when he will come.注意think, believe, suppose等的用法(反意疑问句一从二三主)I think that he will come, won’t he?She thinks that he will come, doesn’t she?I don’t think he will come, will he?I think that he will come (提问he) Who do you think will come?that引导宾语从句无意义,不充当句子成分常省略。
语法讲解:名词性从句语法讲解:名词性从句名词性从句相当于名词,可分别作主句的主语、表语、宾语和同位语。
因此,名词性从句可分为主语从句、表语从句、宾语从句和同位从句。
一、引导名词性从句的连接词连接代词:who,whose, whom, what, which.有词义,在从句中担任成分,如主语、表语、宾语、或定语等。
2. 连接副词:when, where, why, how.有词义,在从句中担任成分,作状语。
连接词:that, whether,if, as if.that 无词义,在从句中不担任成分,有时可省略;if (whether), as if虽有词义,但在从句中不担任成分。
注意:连接代词与连接副词在句中不再是疑问句,因而从句中谓语不用疑问式。
连接代词与连接副词在从句充当句子成分,连接词whether 和if(是否),as if (好像)在从句中不充当句子成分,只起连接作用。
根据句义,如果连接代词与连接副词,whether、if 和as if 都用不上时,才用that作连接词(that本身无任何含义)。
二、主语从句主语从句在复合句作主语。
g. Who will ga2. 用it作形式主语,主语从句放在句末。
g. It doesn‘t mauch wu willat引导主语从句时,不能省略。
g. That he suddenly fell ill last week made us surprised.三、表语从句表语从句在复合句中作表语,位于系动词之后。
g. The question was who could g2. 引导表语从句的连接词that有时可省去。
g. My idea is (that)we can gadlw四、宾语从句宾语从句在复合句中作宾语。
引导宾语从句的连词that一般可省略。
g. I hope (that)everything is all rig2. 介词之后的宾语从句,不可用which或if连接,要分别用what或 wg. I'd in wu'vd the work……I'd in what you've saidwhether与if都可以引导宾语从句,常可互换。
高中英语语法——名词性从句名词性从句相当于名词,可分别作主句的主语、表语、宾语和同位语。
因此,名词性从句成分为主语从句、表语从句、宾语从句和同位从句。
(一)引导名词性从句的连接词1、连接代词:who, whose, whom, what, which。
有词义,在从句中担任成分,如主语、表语、宾语、或定语等。
2、连接副词:when, where, why, how。
有词义,在从句中担任成分,作状语。
3、连接词:that, whether, if, as if。
that 无词义,在从句中不担任成分,有时可省略;if (whether), as if虽有词义,但在从句中不担任成分。
1. 主语从句作句子主语的从句叫主语从句。
主语从句通常由从属连词that,whether,if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,在从句中充当从句的成分。
例如:What he wants to tell us is not clear. 他要跟我们说什么,还不清楚。
It is known to us how he became a writer. 我们都知道他是如何成为一名作家的。
Where the English evening will be held has not yet been announced.英语晚会将在哪里举行,还没有宣布。
有时为避免句子头重脚轻,常用形式主语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。
主语从句后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(2)It + be + 形容词 + that从句(3)It + be + 动词的过去分词 + that从句(4)It + 不及物动词 + that 从句另注意在主语从句中用来表示惊奇、不相信、惋惜、理应如此等语气时,谓语动词要用虚拟语气“(should) +do”,常用的句型有:It is necessary (important, natural, strange, etc.) that …It is a pity (a shame, no wonder, etc.) that…It is suggested (requested, proposed, desired, etc.) that…注意:连词that, whether在从句中不担任句子成分,只起连接作用,不能省略。