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篇1:英语名词性从句易混点区分
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that引导的同位语从句 that引导的定语从句 句法功能上
that只起连接从句的作用,无意义。 在从句中不充当句子成分。 不可省。
that替代先行词在从句中不仅起连接作用, 还充当一个句子成分。如在从句中作 动词的宾语时可省略。
意义上从句是被修饰名词的内容。 从句起限定作用,是定语 。
如:The news that Mr. Li will be our new English teacher is true. (同位语从句,that不可省) 李先生将是我们的新英语老师这个消息是真的。
The news (that) he told me yesterday is true. (定语从句,that在从句中作的宾语,可省)他昨天告诉我的消息是真的。
“建议、命令、要求”的名词后所跟的同位语从句中,谓语动词用虚拟语气should+动词原形表示。should可省。
如: This is our only request that this (should) be settled as soon as :尽快解决这个问题。
间隔同位语从句 同位语从句通常是跟在它解释或说明的名词后,但有些情况下,由于句子结构的原因,同位语从句不紧跟在名词后,而被其他的词隔开。
A warm thought suddenly came to me that I might use the pocket money to buy some flowers for my mother's birthday
简析:由于that从句太长,为避免句子失去平衡,此处用了间隔同位语从句
I will come on condition that John is ,我就来。
On condition, on supposition, on the ground(s), on the understanding, with the exception, in spite of the fact, on the assumption及句式There BE+no doubt(hope,chance,possibility,…)后的that从句为同位语从句。
注意点
1:that和what的区别问题
能引导名词性从句的关系代词有who, whom, what, whose, which, whichever, whatever, whoever八个。
what是不能引导定语从句的。定语从句中如果缺少的成分是主语、宾语、表语,我们选择的是关系代词that或其他。现在山头换了,到了名词性从句的知识范围了。What在名词性从句中就很有用武之地了。还是分析成分,what 在从句中作的主语、宾语、表语。而that只是一个“连接词”,既不作什么成分,也没有什么意义。如:
What you did doesn’t agree with what you promised.
The matter of salary is what I care most if I decide to change my profession.
2. that和whether的区别问题
有时候,它们两个比较难以区别,因为,它们都是连接词,都在从句中不作成分。但是,它们之间最大的区别在于“意义”。即that在从句中既不作成分,也没有自己的意义;而whether就不同了。它虽然不在从句中作什么成分,但是它又意义,即“是否”。这就能够左右从句的意思,使从句所表达的意思变成一个还没有确定的因素。如:
I don’t know whether he can join us or not.
I’m sure that he can join us.
3. wh-词和wh-ever的区别问题
一般认为,wh-词在引导从句时,依然保留了很大部分的疑问词的本色,所以,它们引导的从句在意思上应该表达的是一个“问题”,如:“谁?什么?何时?何地?为何?怎么?”等。而wh-ever已经没有这层色彩,不再关心这样的“问题”,而是充满了让步的意味,多有“无论...”之意。如:
The police wanted to know who will benefit most from the old man’s 。
Whoever will benefit from the old man’s death will be questioned by the 。
篇2:名词性从句讲解和区分
[关系代词和关系副词的误用]
例1 (·全国卷Ⅰ) My uncle is the owner of a restaurant close to that I live.
解析 that→where。本题考查宾语从句,引导词在从句中充当地点状语,所以将that改为where。
例2 (·全国卷Ⅱ) As natural architects, the Pueblo Indians figured out exactly thick the adobe walls needed to be to make the cycle work on most days.
解析 how。根据语境和空后的形容词thick可知应用how引导宾语从句,此处表示要弄清楚到底土坯房的墙需要“多”厚。故答案为how。
点拨 若从句缺少主语、宾语、表语或定语,则考虑用关系代词;若从句缺少时间、地点、原因、方式等状语成分,则使用关系副词(when/where/why/how)。
[if和whether的误用]
例3 He asked her the question if they can be friends.
解析 if→whether。question后为同位语从句,只能用whether来引导,故而将if改为whether。
例4 It doesn’t matter so much you will come or not.
解析 考查主语从句。句意:你来还是不来,这不怎么重要。代词it作形式主语,真正的主语是whether引导的主语从句。
点拨 在表达“是否”这一意思时,我们经常会用到whether和if,但以下几种情况只用whether不用if:
1. 在表语从句、主语从句、同位语从句中;
2. 在介词后的宾语从句中。如:It all depends on whether they will support us.
3. 在不定式之前。如:He doesn’t know whether to stay or not.
4. 从句中有or not时。如:He doesn’t know whether he should stay or not.
[what和that的误用]
例5 (2025·上海卷) Eventually, I decided to follow her and 26 happened truly amazed me.
解析 what。句意:发生的事情真的让我很惊讶。设空处无提示词,分析从句的结构可知,从句中缺少主语,且指代的是物,可判断答案为what。本句中连接代词what引导主语从句且在从句中做主语。
例6 He was interested in that he had seen at the exhibition.
解析 that→what。介词in后的宾语从句中缺少宾语,应用what。
点拨 要正确填入引导词,关键在于分析句子结构,判断引导词在从句中所作的成分。引导从句时,that不作任何句子成分,只起连接作用;what可作主语、宾语、表语、定语,既充当从句的一个成分,又引导一个从句,意为“什么”“……的人”“……的地方”“……的样子”。
[wh-ever的误用]
例7 (2025·北京卷)Your support is important to our work. you can do helps.
A. However B. Whoever
C. Whatever D. Wherever
解析 C。考查主语从句。本题中,helps是谓语,you can do属于主语的一部分。在主语从句中,do的后面缺少宾语,whatever引导主语从句,同时作do的宾语,该句意思是:你能做的任何事都有帮助。
点拨 关系代词whoever, whatever, whichever引导名词性从句时,相当于anyone who,anything that等;引导让步状语从句时,相当于no matter who/what/which。
注意 1. wh-和wh-ever的区别:wh-有疑问的意思;wh-ever有强调的意思。如:
Who will be invited hasn’t been decided.
Whoever/Anyone who comes here is welcomed.
2. wh-ever在引导名词性从句时不能用no matter wh-来替换,但在引导状语从句时可以替换。如:
Whatever happened, he would not mind.
= No matter what happened, he would not mind.
[代词it的误用]
例8 This is not surprising that the Silver Ghost was regarded as “the best car in the world”.
As is known to all my classmates that I can speak English as if I were a native speaker.
解析 This→It;As→It。两个句子均是主语从句,应该用it作形式主语。
点拨 代词it作形式主语,将主语从句放到句尾,引导词则根据从句所缺的成分来确定。出题人一般会利用同学们对该结构掌握不牢而针对形式主语it设题。
例9 (2025·浙江卷) How would you like , if you were watching your favorite TV program and someone came into the room and just shut it off without asking you?
A. them B. one
C. those D. it
解析 D。if引导的宾语从句是本句真正的宾语,而空格处是形式宾语,只有it可充当形式宾语。
点拨 有些动词或短语,如like, hate, dislike, appreciate, owe, depend on, see to,接宾语从句时需要在宾语从句前加it做形式宾语。例如:
I don’t like it when you look at me like that.
[与其他从句的混淆]
不少同学经常将名词性从句与其他从句,尤其是与定语从句和强调句搞混。
1. 与定语从句的区别
例10 (2025·天津卷) The boss of the company is trying to create an easy atmosphere his employees enjoy their work.
解析 where。句意为“这家公司的老板正尽力为员工创设一种让他们能尽情享受工作的氛围”。设空处引导的定语从句修饰先行词atmosphere,该从句缺地点状语,故填关系副词where,相当于in which。
点拨 定语从句与名词性从句的区别:定语从句前必须有先行词,先行词通常为名词或代词;名词性从句除同位语从句外,前面均无名词或代词。
2. 与强调句的区别
例11 (2025·湖北卷) It was in the lake that they found the long last sword of the Ming Dynasty.
解析 本句为强调句式,强调了地点状语in the lake,意思是“正是在那个湖里……”。that与前面的It was共同构成强调句式。
例12 (2025·江苏卷) It is often the case anything is possible for those who hang on to hope.
A. why B. what
C. as D. that
解析 考查主语从句。本句中it是形式主语,真正的主语是D。that引导的主语从句,that在本句中不充当成分。句意:通常对那些心存希望的人来说,一切都是可能发生的。
点拨 要弄清名词性从句与强调句的区别,同学们就应该牢记强调句中若去掉it is/was ... that ...,句子依然完整,而名词性从句中用来引导主、宾语从句的that尽管没有实际含义,但在从句中起连接作用。
篇3:英语名词性从句课件
英语名词性从句课件
名词性从句是历年高考的重点和难点也是热点。名词性从句相当于名词,可用作主句的主语、表语、宾语和同位语。因此,名词性从句分为主语从句、表语从句、宾语从句和同位从句。引导名词性从句的连接词有: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;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,if (whether), as if虽有词义,但在从句中不担任成分;that 无词义,在从句中不担任成分,有时可省略。
今后对名词性从句的考查仍将集中在关联词的选用上,特别石堆what引导的名词性从句的考查。名词性从句与其他从句的混合考查将在今后高考中占据一席之地。易混句型的辨析,比如it作形式主语,主语从句后置的句型与强调句型的辨析将仍作为高考考查的重点。
名词性从句的用法
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。
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