名词性从句
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名词性从句讲解(最全版)名词性从句是一个从句,它在句子中充当名词的角色。
它可以作为主语、宾语、表语、同位语或介词宾语。
名词性从句通常由连接词引导,如that、whether、if、who、whom、whose、which、what等。
1. 作为主语:名词性从句可以作为主语,取代一个名词或名词短语,引导词通常为that或whether。
例如:- What you said is true.(你说的是真的。
)- Whether he will come is still uncertain.(他是否会来还不确定。
)2. 作为宾语:名词性从句可以作为及物动词或介词的宾语,引导词通常为that、whether、if、who、whom、whose、which、what等。
例如:- She asked me what I wanted.(她问我想要什么。
)- I don't know if/whether he will come.(我不知道他是否会来。
)3. 作为表语:名词性从句可以作为系动词的表语,引导词通常为that、whether、who、whom、whose、which、what等。
例如:- The problem is that she doesn't understand.(问题在于她不理解。
)- The question is who will take care of them.(问题是谁会照顾他们。
)4. 作为同位语:名词性从句可以作为同位语,解释或说明前面的名词或代词,引导词通常为that、whether、who、whom、whose、which、what等。
例如:- The fact that he lied surprised me.(他撒谎的事实让我感到惊讶。
)- His belief that she will succeed is unwavering.(他坚信她会成功。
语法专题二:名词性从句1. 名词性从句的基本概念:1) 主语从句:在句中充当主语;亦可用it作形式主语,主语从句置于句末。
2) 宾语从句:在句中充当及物动词或介词的宾语;亦可用it作形式宾语,宾语从句置于句末。
3) 表语从句:在句中充当系动词的表语。
4) 同位语从句:常置于fact, idea, news, promise, doubt, suggestion, possibility, belief等表示有内容的名词后,起解释、说明作用。
2. 注意:1) 名词性从句要用陈述句语序。
2) 名词性从句中缺少主语、表语、宾语时:常用what 导,亦可用which表示选择,用who/whom/whoever指人。
缺少状语:用where(表地点), when(表时间), how(表方式), why(表原因)。
3) 如不缺成份:主语从句、同位语从句用that引导,不能省略;表从、单个动词宾从可省略引导词that;介词宾从、第二个宾从,引导词that一般不省略;it作形式主语或宾语时,引导实际主从或宾从,一般that不省略;当主从、宾从本身为复合句时,引导词that不省略。
如:He told us sadly that what he had done secretly was discovered by his parents.4) 含宾从的复合句中,主句和从句的时态保持一致,但如果从句中表示是客观现象,虽然主句是过去时态,从句仍用一般现在时。
5) 主语从句做主语,谓语动词用单数;如果由and 连接两个或两个以上的主语从句做主语时,谓语动词用复数;由两个或多个连接词引导一个主语从句,谓语动词用单数。
6) 当主句是I/We think(或suppose, expect, believe, imagine, guess)时,其后的宾语从句如果是否定的,常常把否定词not从从句中移到主句中。
7) 只能用whether,不能用if表示“是否”的情况如下:(1) 在表语从句和同位语从句中;(2) 在主语从句中,如果用it做形式主语,whether和if都能引导主语从句,否则,只能用whether(3) 在介词之后;(4) 后面直接跟动词不定式;(5) 与or not连用;(6) 引导让步状语从句,只能用whether。
名词性从句1.名词性从句的定义名词性从句是起名词作用的从句,这些从句可以作为一个整体来看,其作用就相当于一个名词,在复合句中作主语,宾语,表语和同位语。
名词性从句包括主语从句,表语从句,宾语从句,同位语从句四种。
2.名词性从句的连接词名词性从句通常由一个连接词和主句相连。
连接词很重要,它既是联系主句的纽带,又是从句的标志,通过连接词,我们可以辨认不同从句的性质。
一.从属连接词(在从句中不充当任何成分,只起到连接从句的功能)A.that 只是引导名词性从句,本身并没有实际意义,在从句中不充当任何句子成分。
That he will come to the meeting is certain.(主语从句)The fact remains that we are behind the other group.(同位语从句)B.if和whether具有“是否”的意义,但是whether比较正式,在口语中人们经常if, if 和whether在名词性从句中尽管不充当任何的成分,但不可以省略。
C.whether不能替代if的情况1.if只能引导宾语从句(做介词宾语的情况除外),而whether 可以引导所有的名词性从句。
She asked if/ whether that was enough.Whether the football match will be played depends on the whether.The question is whether we can arrive there on bus.2.whether引导宾语从句做介词的宾语,if没有这种用法It depends on whether it will be fine.3.whether后紧跟不定式He was wondering whether to go home.4.or not 可直接跟在whether后面,但不可以直接跟在if后面。
名词性从句的三种类型及例句解析名词性从句是指在一个句子中充当名词的从句。
它可以作主语、宾语、表语和同位语等,并能够起到连接子句与主句的作用。
在英语语法中,有三种主要类型的名词性从句:宾语从句、主语从句和表语从句。
本文将详细解析这三种类型,并举例说明其用法。
一、宾语从句宾语从句作为一个整体出现在主句中的动词后面,充当主句的宾语。
它常常引导由that、whether/if、wh-疑问词引导的从句。
下面是一些例句:1. 主句:He asked me a question.宾语从句:He asked me whether I had finished my homework.解析:宾语从句"whether I had finished my homework"作为动词"ask"的宾语,表达了一个疑问。
2. 主句:She doesn't know the answer.宾语从句:She doesn't know what the answer is.解析:宾语从句"what the answer is"作为动词"know"的宾语,表示对答案的不知道。
3. 主句:They wonder if he will come to the party.宾语从句:They wonder if/whether he will come to the party.解析:宾语从句"if/whether he will come to the party"作为动词"wonder"的宾语,表达了对他是否会来参加派对的疑问。
二、主语从句主语从句作为一个整体出现在句子的最前面,充当主句的主语。
它通常由that引导,也可以由wh-疑问词引导。
以下是一些例句:1. 主句:It is important to learn a foreign language.主语从句:That she is a hardworking student is important.解析:主语从句"That she is a hardworking student"作为句子的主语,强调了她是一个勤奋的学生的重要性。
名词性从句在复合句中起名词作用的从句叫做名词性从句。
它包括主语从句、宾语从句、表语从句和同位语从句。
名词性从句是中学阶段的一个重要语法项目,在历年的高考中几乎都涉及到,并且每年的命题各有变化。
一、名词性从句主语从句、表语从句、宾语从句、同位语从句,在整个句子中所起的作用,相当于一个名词。
因此,这四种从句通称为名词性从句。
引导名词性从句的连接词可分为三类:连接词:that, whether, if (不充当从句的任何成分)连接代词:what, whatever, who, whoever, whom, whose, which.连接副词:when, where, how, why1.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主语从句的例句:That he was won the prize is true.It is true that he has won the prize.What he said at the meeting is right,Whether he will come or not is unknown.Whoever comes will be welcome. Why he did it is not quite clear.2. 宾语从句名词句用作宾语的从句叫宾语从句。
什么是名词性从句?名词性从句(Noun Clauses)是一个在句子中充当名词的从句。
它可以在句子中担任主语、宾语、表语或补语的角色。
名词性从句通常由连词引导,例如that, whether, if, who, whom, whose, what, which, when, where, why等。
以下是名词性从句在不同角色中的示例:1. 主语(Subject):- What she said surprised me.(她所说的让我感到惊讶。
)- Whether we go or not is up to you.(我们去与否由你决定。
)2. 宾语(Object):- I know that he is coming.(我知道他要来。
)- She asked me where I was going.(她问我要去哪里。
)3. 表语(Predicate):- The problem is how to solve it.(问题是如何解决它。
)- His wish is that everyone gets along.(他的愿望是每个人和睦相处。
)4. 补语(Complement):- The important thing is what you do next.(重要的是你接下来要做什么。
)- His goal is to become a doctor.(他的目标是成为一名医生。
)名词性从句的使用可以使句子更加丰富和灵活,它可以替代一个独立的名词,并在句子中承担相应的语法角色。
名词性从句可以用于各种不同的语境,包括陈述句、疑问句和感叹句等。
需要注意的是,名词性从句的引导词可以根据从句的具体内容和功能而有所不同。
因此,在使用名词性从句时,我们需要根据语境和句子的需要选择适当的引导词。
了解和掌握名词性从句的概念和用法,可以帮助我们在英语表达中更加灵活和准确地使用不同类型的从句。
一、名词性从句在句子中起名词作用的句子叫名词从句(Noun Clauses)。
名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等,因此根据它在句中不同的语法功能,名词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、引导名词性从句的连接词引导名词性从句的连接词可分为三类:连接词:that, whether ,if 不充当从句的任何成分连接代词:what, who, whom, whose, which,whatever, whoever, whomever, whosever whichever连接副词:when, where, why, how请讨论一下,以上这些词在句子中的成分。
三、连接词在名词性从句中的功能(一)比较:whether与if 均为"是否"的意思。
但在下列情况下,1._________ you win or not does not matter.2. The question is ________ the sports meeting will be held on time.3. I am thinking about_______ I should buy a new car.4. I don’t know _______ or not he has arrived.5. __________ he will come is not clear.总结:1. whether引导主语从句并在句首2. 引导表语从句3. whether从句作介词宾语,4. 从句后有"or not" /whether to do …/whether A or B大部分连接词引导的主语从句都可以置于句末,用it充当形式主语。
Whether he will come or not is not apparent.--------It is not apparent whether he will come or not .(二) Which & what 区别:Eg:1.________you can use among these tools depends on the rules.2______ y ou can use depends on the rules.总结:有范围用which ; 无范围用what分类讲解:一、主语从句(一)whether, if, that1.______she was chosen made us very happy.2.________ he will come or not is not yet known.3. You don’t like him is none of my business.(改错)4. If we’ll have a picnic tomorrow is still unclear. (改错)总结:Whether: 有意义,无成分,不省略的连词;that:无意义,无成分,不省略的连词(二)连接代词:Eg:1.________ will go is not important.2._______ we need now is more practice.3. _______ you choose is all right with me.4. _______ I have done is only for you.(我做的一切都是为了你)5. ________ breaks the law will be punished.6. It is none of your business ______ other people think about you.1. who2. What3. Whatever4. What ever5. Whoever6. What do you think about …?总结:1. Wh- / wh-ever 区别(三)连接副词:Eg:1._______ he will set off is unknown.2.________ he failed the physics exam was not clear.3.________our wedding party will be held hasn’t been decided yet.4._______ they will solve the serious problem has not been elected.1.when2. Why3. Where/when4. How(四)“it ”做形式主语的句型:That-从句作主语通常用it作先行词,而将that-从句置于句末,例如:It is quite clear that the whole project is doomed to failure.很清楚,整个计划注定要失败。
It's a pity that you should have to leave.你非走不可真是件憾事。
用it作形式主语的that-从句有以下四种不同的搭配关系:a. It + be +形容词(obvious ,true, natural, surprising ,good, wonderful, funny, possible, likely certain probable, clear …)+ that-从句It is necessary that…有必要……It is important that…重要的是……It is obvious /evident that…很明显……it is probable that…It is possible that…It is possible for sb. to do …It is likely that…Sb./sth. Is likely to do …It is certain that (不用sure)b. It + be + -ed 分词(said, reported , thought, believed , expected, decided, announced, arranged )+ that-从句It is believed that…人们相信……It is known to all that…从所周知……It has been decided that…已决定……It is said/reported/ estimated that…It is suggested/ advised /ordered / requested/ required /insisted/ demanded that clause( should v.)虚拟c. It + be +名词(no wonder , an honor , a good thing, a pity, no surprise …)+ that-从句It is common knowledge that………是常识It is a surprise that…令人惊奇的是……It is a pity that…It is a wonder that …It is no wonder that …d. It +不及物动词+ that-分句It +(seem, appear ,happen , occur …) +thatIt appears that…似乎……It happens that…碰巧……It occurred to me that…我突然想起……e, 其他句型It does not matter that…It makes no difference that…It does not make too much difference that…It suddenly struck my that…It is be of help that…= It is helpful that…二、宾语从句Eg:1.I wonder if /whether you can give me a hand.2.It all depends on what you could get.3.I am afraid that you will be kept there forever.思考:宾语从句有哪几类?分类讲解:第一类:动宾1.表示要求,建议,命令的词后用should+vEg: insist suggest2.v 间宾宾语直接宾语(1) 双宾语易位时需借助介词to的常用动词award sb. sth. = award sth. to sb. 颁奖给某人bring sb. sth. = bring sth. to sb. 把某物带给某人hand sb. sth. =hand sth. to sb. 把某物递给某人lend sb. sth. = lend sth. to sb. 把某物借给某人mail sb. sth. = mail sth. to sb. 把某物寄给某人offer sb. sth. = offer sth. to sb. 将某物给某人owe sb. sth. = owe sth. to sb. 欠某人某物pass sb. sth. = pass sth. to sb. 把某物递给某人pay sb. sth. = pay sth. to sb. 付给某人某物(钱)post sb. sth. = post sth. to sb. 把某物寄给某人read sb. sth. = read sth. to sb. 把某物读给某人听return sb. sth. = return sth. to sb. 把某物还给某人send sb. sth. = send sth. to sb. 把某物送给某人sell sb. sth. = sell sth. to sb. 把某物卖给某人serve sb. sth. = serve sth. to sb. 拿某物招待某人show sb. sth. = show sth. to sb. 拿某物给某人看take sb. sth. = take sth. to sb. 把某物拿给某人teach sb. sth. = teach sth. to sb. 教某人某物tell sb. sth. = tell sth. to sb. 告诉某人某情况throw sb. sth. = throw sth. to sb. 把某物扔给某人write sb. sth. = write sth. to sb. 给某人写信(2) 双宾语易位时需借助介词for的常用动词book sb. sth. = book sth. for sb. 为某人预定某物buy sb. sth. = buy sth. for sb. 为某人买某物choose sb. sth. = choose sth. for sb. 为某人选某物cook sb. sth. = cook sth. for sb. 为某人煮某物draw sb. sth. = draw sth. for sb. 为某人画某物fetch sb. sth. = fetch sth. for sb. 为某人去取某物find sb. sth. = find sth. for sb. 为某人找到某物fix sb. sth. = fix sth. for sb. 为某人准备某物get sb. sth. = get sth. for sb. 为某人拿来某物make sb. sth. = make sth. for sb. 为某人做某物order sb. sth. = order sth. for sb. 为某人订购某物pick sb. sth. = pick sth. for sb. 为某人采摘某物prepare sb. sth. = prepare sth. for sb. 为某人准备某物save sb. sth. = save sth. for sb. 为某人留某物sing sb. sth. = sing sth. for sb. 为某人唱某物(歌)spare sb. sth. = spare sth. for sb. 为某人让出某物steal sb. sth. = steal sth. for sb. 为某人偷某物注:有的动词后接的双宾语易位时,既可用介词to引出间接宾语,也可用介词for引出间接宾语,含义相同,如bring,play等:Bring me today’s paper. = Bring today’s paper to [fo r] me. 把今天的报纸拿给我。