what和that的用法区别
pep初中语法 名词性从句中that和what的用法区别
第3题补充3. 名词性从句中that和what的用法区别(转载)(2007-12-13 18:20:19)名词性从句中that和what的用法区别一．that 引导的名词性从句首先，连接代词that除引导第一个宾语从句时可以省略外，引导其他各类名词性从句皆不能省略。
例如：①It is required in the regulations that you should not tell other people the password of youre-mail account.②---- Don’t you think it necessary that he go home at once?---- but the problem is that there is no car.③There is much chance that Bill will recover from his injury in time for the race.④Our English teacher told us (that) we all did very well in the examination and that ten of us gotfull mark.以上四个句子中，that 分别引导主语从句，表语从句，同位语从句和宾语从句，除在第四个例句中第一个that 可以省略外，其他的that 均不可省略。
其次，在引导名词性从句时，that不作句子中的任何成分。
例如：①Nobody believed his reason for being absent from the class that he had to meet his uncle at theairport.该句中，that引导同位语从句，但在句中不作任何成分。
②It is our belief that improvements in health care will lead to a stronger, more prosperous economy.该句中，it 是形式主语，that引导的主语从句才是整个句子的真正主语，that在句中不作任何成分。
what和that的用法讲义--2023届高三英语复习备考
what和that的用法讲义what和that都是从句的引导词，或者说，都是可以连接主句和从句的连词。
要弄清楚这两个词的用法，我们首先要明确what和that分别都可以引导哪些从句。
一.关于whati what是名词性从句的引导词，名词性从句包括主语从句，宾语从句，表语从句，同位语从句。
所以，what可以引导的从句也就是上面提到的四类从句。
二.关于that(①that是名词性从句的引导词，所以，that也可以引导主语从句，宾语从句，表语从句，同位语从句。
②that是定语从句的引导词，所以，that还可以用来引导定语从句，放在所修饰的名词后面。
我们来看这样几个句子：1.This is what we are looking forward to. (表语从句)这是我们一直所期待的事情。
【分析】what引导的从句，放在了系动词is后面，放在表语的位置，是表语从句。
此时，what=the thing that所以，上面的句子可以改写成：This is the thing that we are looking forward to.2. What makes this shop different(主语从句)is that it offers more personal services. (表语从句)这家店与众不同的地方在于它提供更多的个人服务。
【分析】what引导的句子，放在句子开头，位于系动词is前面主语的位置，是主语从句。
此时，what=the thing that所以，上面的句子可以改写成：The thing that makes this shop different is that it offers more personal services .此外，原句that 引导的句子放在系动词is后面，放在表语的位置，所以是表语从句。
3. There are signs that restaurants are becoming more popular with families. (同位语从句)有迹象表明，餐馆在家庭中越来越受欢迎。
宾语从句中what和that
宾语从句中what和that
宾语从句中，what和that都可以用来引导从句，但两者在用法上存在一些区别。
what引导宾语从句时，在从句中可以作主语、宾语或表语，表示“所……的……”。
具体用法如下：
- 表示“……的东西或事情”，相当于“the thing that...;all that...;everything that...”。
- 表示“……的时间”，相当于“the time that”。
- 表示“……的人”，相当于“the person that”。
- 表示“……的地方”，相当于“the place that”。
- 表示“……的数目”，相当于“the amount/number that”。
that引导宾语从句时，在从句中不作句子成分，一般情况下可以省略。
但当有两个以上的宾语从句时，通常只能省掉第一个that。
在使用宾语从句时，需要注意句子结构和语法规则，选择合适的引导词来表达正确的意思。
what 的特殊用法及that的区别
What = the thing that 1. ”…的事(物)”2. 充当成分一、表示“……的人”,相当于“the person that...”。
如:1.He is not what he was a few years ago.他不是几年前的他了。
2.Who is it that has made Fred what he is now?是谁把弗雷德培养成现在这样一个人的?二、表示“……的地方”,相当于“the place that...”。
如:1.This is what they call Salt Lake City.这就是他们称作盐湖城的地方。
2.What is now the North Sahara Desert was once a civilized world.现在是北部撒哈拉沙漠的地方曾是一个文明世界。
三、表示“……的数目”,相当于“the amount / number that...”。
如:1.Our income is now double what it was ten years ago.我们现在的收入是十年前的两倍。
2.The number of the students in our school hasreached as many as 20,000, ten times what it was before liberation.现在我校学生多达2万人,是解放前的十倍。
what的这种特殊含义可以根据句子的意思在翻译时灵活处理,不可千篇一律。
再如:1. Shenzhen is no longer what it was in the past.深圳不再是过去那样子了。
(what=the city that)2. The color of the flower is different from what it was in the morning.花朵的颜色与早晨的不同。
which when who what that用法
which when who what that用法“which”、“when”、“who”、“what”和“that”用法的简要说明：1.which：(1)用法：主要作为关系代词，用于引导定语从句，指代一个事物或情况。
(2)例子：The book, which I bought yesterday, is veryinteresting.（我昨天买的那本书很有趣。
）(3)注意：which在从句中可以担任主语、宾语或定语，且前面通常有一个逗号，表示非限制性定语从句。
2.when：(1)用法：主要用作关系副词，引导定语从句，表示时间。
(2)例子：I remember the day when we first met.（我记得我们第一次见面的那一天。
）(3)注意：when在从句中作时间状语，描述主句中的某个动作或状态发生的时间。
3.who：(1)用法：作为关系代词，引导定语从句，指代人。
(2)例子：The man who talked to me is my uncle.（和我谈话的那个人是我叔叔。
）(3)注意：who在从句中可以担任主语或宾语，描述人的身份或特征。
4.what：(1)用法：主要用作疑问代词或连接代词，引导名词性从句（如主语从句、宾语从句、表语从句等），询问内容或事物。
(2)例子：What you said made me very sad.（你说的话让我很伤心。
）(3)注意：what在从句中通常担任主语、宾语或表语，表示所谈论的具体内容。
5.that：(1)用法：在定语从句中作为关系代词，指代先行词，并在从句中作主语、宾语或表语。
此外，that还可以用于引导名词性从句（主语从句、宾语从句、表语从句和同位语从句），在从句中无具体含义，只起连接作用，而且在从句中也不作任何句子成分，它所引导的从句的句子结构和意义是完整的。
(2)例子（定语从句）：The book that I am reading is very interesting.（我正在读的那本书很有趣。
What--和that-在名词性从句中的用法区别
What 和that 在名词性从句中的用法区别What 和that 都可以引导名词性从句。
一．在引导名词性从句时，从属连词that一般要注意三个不（three nos）：1．不省略（no ellipsis）当从属连词that引导主语从句、表语从句和同位语从句时，that 不省略。
Eg. 1) That he was able to come made us happy.(That 引导主语从句不可省略)2)The truth is that I didn’t go there. (that引导表语从句不可省略)3)The news that our team has won is true. (that 引导同位语从句不可省略)但在非正式文体中that 引导宾语从句时可以省略，除下列两种情况外：that在宾语从句中不能省略的情况.(1). 在主+谓+it(形式宾语)+宾补+that，从句(真正宾语) 的句型中不省略.Eg: 4) He made it quite clear that he preferred to study English.（that不可以省略）他很明确地说他宁愿学习英语。
(2). 由连词and连接的两个由that引导的宾语从句中, 则第二个宾语从句前的that不省略。
Eg: 5) He told me that he would come and that he would come on time.（第一个That可以省略，但第二个that 不可以省略。
)他告诉我他将来而且他将准时来。
2．不作成分（no component）that 在名词性从句中不作任何句子成分。
Eg. 6)Sydney kept hispromise that he would always do anything he could for Lucie to make sure of her happiness.（that在句中引导同位语从句，但在句中不作任何成分）7))That you don’t like him is none of my business. (that 在句中引导主语从句，但在句中不作任何成分，也不省略）3．没词义（no meaning）that 在名词性从句中没有汉语意思。
英语语法：四组名词性从句引导词用法区别
【导语】欢迎阅读为⼤家精⼼整理的英语语法：四组名词性从句引导词⽤法区别！欢迎阅读学习！更多相关讯息请关注！ 四组名词性从句引导词⽤法区别 1. what 与that的⽤法区别 两者均可引导主语、表语、宾语从句，区别是what可在从句中⽤作主语、宾语或表语，意为“什么”或“所…的”，⽽that仅起连接作⽤，本⾝没有实际意义，在从句中也不充当任何句⼦成分(引导宾语从句时通常可以省略)： He doesn’t know what she likes. 他不知道她喜欢什么。
What you say is quite right. 你所说的相当正确。
I believe (that) he will come to see us. 我相信他会来看我们的。
It’s a pity (that) he didn’t finish college. 真遗憾他⼤学没毕业。
另外，that 可引导同位语从句，但 what 通常不⽤于引导同位语从句： I had no idea that you were here. 我不知道你在这⼉。
2. whether与 if的⽤法区别 两者的⽤法异同注意以下⼏点： (1) 两者均可引导宾语从句，表⽰“是否”，常可互换： He asked if [whether] we wanted a drink. 他问我们是否想喝⼀杯。
He didn’t tell me if [whether] he would come. 他没有告诉我他是否会来。
【注】若是引导条件状语从句，则只能⽤ if(意为“如果”)。
(2) 当引导⼀个否定的宾语从句时，通常⽤ if ⽽不⽤ whether： I don’t care if it doesn’t rain. 我不在乎天是否下⾬。
【注】在个别词语(如 wonder, not sure 等)后的从句否定式有时也可⽤ whether 引导： I wonder if [whether] he isn’t mistaken. 我想知道他是否错了。
复合句式重难点-what和that的用法区别
复合句式重难点-what和that的用法区别许多同学在学习复合句和特殊句式时，都会为“that”和“what”的选择而头疼，感觉这两个连接性词语辨别起来“有点乱”。
你也不妨先做一做下面几个题，看看你能否把他们分清：1.A modern city has been set up in ____ was a wasteland ten years ago.A. whatB. whichC. thatD. where2.Because of my poor memory, all ____ you told me has been forgotten.A. thatB. whichC. whatD. as3.With his work completed, the businessman stepped back to his seat, feeling pleased ____ he was a man of action.A. whichB. thatC. whatD. whether4.It is what you do rather than what you say _______ matters.A. thatB. whatC. whichD. this5.His plan was such a good one _________ we all agreed to accept it.A. soB. andC. thatD. as上面5个题中的前四个题，在选项中都同时出现了what和that，如何选择呢？第1题为答案A。
考查名词从句连接代词what的运用。
“十年前是一片荒地的地方建起了一座现代化的城市”。
作介词in的宾语不能用that，因为名词从句中that 不做任何成分；连接代词what引导一个宾语从句，“是一个什么样的地方”；第2题为答案A。
考查定词从句关系代词that的运用，“因为记忆不好，你告诉我的，我都给忘了”。
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the＋名词＋that”或者all that, 即好像是既包括了先行词也包含了
关系代词，因此，有学者称之为关系代词型what。如：
seemed to be a long time, he came up again.
1 _T_h_a_t_ she lacks experience is obvious. 2 The police learned _t_h_a_t _ he wasn’t there at that time. 3 He realized _th_a_t__ she too was tired. 4 My idea is _t_h_a_t you shouldn’t have left the country. 5 Bob has the mistaken idea _th_a_t_tomorrow is a holiday. 6 It was quite plain _t_h_a_t_ he didn’t want to come. 7 It is natural _t_h_a_t_ they should have different views.
that—从属连词
主语从句 宾语从句
引导_名_词__性_从__句___， 表语从句
_不_充__当__句子成分， 同位语从句
_没_有____字面意义。
引导宾语从句的 that可以省略
1 _W__h_a_the had hoped at last came true. 2 China is no longer _w_h_a_t_ it used to be. 3 I’m sorry for _w_h_a_t_ I said. 4 That’s _w_h_a_t_ I want to know. 5 It was _w_h_a_t_ he meant rather than w__h_a_t he said. 6 There’s something in _w_h_a_t_ he says. 7 200 years ago, they came to _w__h_a_t we call “America” now.
B All
C Anything D All what
3. A computer is so useful a machine
___C___ we can use everywhere.
A that B which C as D what 4（2005天津卷）last month， part of
Southeast Asia was struck by floods，
W__h_a_t (=The thing that) happened after that was interesting.
China is not _w_h_a_t(=the China that) used to be. The boy dived into water and after w__h_a_t (the time that)
that前通常会有一个名词或代词,即先
行词。what则包括了先行词和that. 辨
What he said was true.析源自The words that
I enjoy all that is going on.
what
Practice makes perfect!
1. ——Is that the small town you often
What 分别引导什么从句?
what永远不能省略！
what从属连词 引导_名_词__性_从句 _充_当___句子成分 _有_/_没_有_字面意义
主语从句 表语从句 宾语从句 同位语从句 ?
“动词+的”
什么
结构
1 You must do everything _th_a_t_ I do. 2 Is there any question t_h_a_t_ troubles you much ? 3 James is the best singert_h_a_t_ I have ever known. 4 They were talking about the people and places _t_h_a_t they had visited. 5 Which is the book t_h_a_t_ he borrowed from the library ? 6 Who is the person _t_h_a_t is talking to our headmaster? 7 My hometown is no longer the village _th_a_t_ it used to be.
refer to？
——Right， just the one __C___ you
know I used to work for years.
A that B which C where D what
2. __A__ should be done must be done
in time.
A What
那几个that 可以省略？为什么？
that 关系代词 引导定语从句 没有字面意义 充当句子成分 作宾语可以省略
引导名词性从句
that
不充当 句子成分
主语从句 宾语从句 表语从句 同位语从句
what
充当 句子成分
引导定语从句
也可以把what看成在主句 和从句里都充当句子成分，
that PK what 即兼语式。
that Vs what
复合句式重难点 what和that的用法区别
what引导名词性从句在从句中作主语、宾语、表语或定语
(1) 具有疑问代词性质的what: 意为“什么,什么样的”.如：主宾表以及定语
I don't knoww__h_a_t he needs. (2) 在名词前表示感叹的what：意为“多么”。如：