关系代词as的用法.ppt
as 在定语从句中的用法
as 在定语从句中的用法在定语从句中，"as" 可以作为关系代词或关系副词使用。
1. "as" 作为关系代词：当"as" 作为关系代词时，它引导一个非限制性定语从句，用来修饰前面的名词，并且在从句中起到主语的作用。
例如：- He works as an engineer, as his father did. （他做工程师，就像他父亲一样。
）在这个例子中，"as" 引导的定语从句修饰名词"engineer"，并且在从句中作为主语。
进一步解释这个例子，可以将定语从句分解为两个简单句子：- He works as an engineer.- His father did (work as an engineer).2. "as" 作为关系副词：当"as" 作为关系副词时，它引导一个限制性定语从句，用来修饰前面的名词，并且在从句中起到比较程度、原因、方式、时间等方面的作用。
比较程度：- She is not as tall as her sister. （她不如她姐姐高。
）在这个例子中，"as" 引导的定语从句修饰名词"tall"，表示比较程度。
原因：- I couldn't sleep last night, as I drank too much coffee. （我昨晚睡不着觉，因为我喝了太多咖啡。
）在这个例子中，"as" 引导的定语从句修饰名词"I"，表示原因。
方式：- The teacher explained the math problem as clearly as possible.（老师尽可能清楚地解释了这道数学题。
）在这个例子中，"as" 引导的定语从句修饰名词"clearly"，表示方式。
as的用法
4、在多数情况下，从句中的谓语动 词可省略
as explained before如前面所解释的 as mentioned above如前面所提到的 as shown in the figure如图所示 as already discussed正如已讨论的 as seen from the table从表中可以看出
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习
When a pencil is partly in a glass of water, it looks as if it（ B ）. A. breaks B. were broken C. has broken D. had been broken 本题为as if 引导的虚拟条件句，主句表示与 常识相反，谓语动词应该使用过去时。
(3). As作为介词，常和以下动词连用。 regard…as/be known as/consider…as use…as/ describe…as/be remembered as work as/ act as/be honored as We regard the sun as the source of most forms of energy.
II、as作为副词
在as…as…结构中，前一个as是副词，后一个 as是连词（有时可省略）；在否定句中，作 副词的as可以用so代替。例如： The book is pretty difficult. That one is as difficult. He is as tall as his father.
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More examples: ① She died as a result of the accident. ② The reasons are as above(as follows). ③ The machine runs as usual. ④ As a matter of fact, air is a gas. ⑤ His father gets up early as a rule. ⑥ You should improve your English as soon as possible. ⑦When sound travels through air, the air, as a whole doesn’t move. ⑧Today our life has been much better as compared with that before liberation. 和解放前 比起来我们今天的生活好得多了。
as的用法 PPT
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as we know now.
4.若非限制性定语从句中的谓语动词是 be said be known,be expected, be reported , be announced等结构时，不论是在句首，句中， 句末，都必须as用来引导. e.g
As is known to us, Taiwan is a part of China.
as well.
4. So as to do sth./so…as to do sth.→引导 目地或结果状语。e.g
He studies hard so as to pass the exam.
He was so strong as to carry the heavy box.
5. such as→意为“例如，诸如”可用来引入 同位语，举一例或数例说明它与之同位词 的词 所含的具体内容。
2. 引导非限制性定语从句，用来指代它前面的 整个句子(即先行句)，意思是“这一点”。这个 分句可以放在句首，句中，或句末。e.g
③ This elephant is like a snake, as anybody
定语从句中as的用法总结
定语从句中as的用法总结定语从句中的as可以作为关系代词或连接词。
1.作为关系代词：-在非限制性定语从句中，用于表示身份、职业、国籍等方面的同一性或相似性关系。
例如：She works as a teacher, as her mother does.（她像她妈妈一样，是个老师。
）-在限制性定语从句中，用于指代整个主句的内容，相当于“which”或“that”。
例如：The hotel, as I mentioned earlier, is located in the city center.（就像我之前提到的，那家酒店位于市中心。
）2.作为连接词：-表示原因或理由，相当于“because”、“since”或“for”。
例如：He couldn't come to the party, as he was busy with work.（他因为工作忙，所以不能来参加派对。
）-表示方式或方式，相当于“in the way that”或“as if”。
例如：He did the work as instructed.（他按照要求完成了工作。
）-表示“正如……一样”，相当于“just as”。
例如：As many people say, laughter is the best medicine.（就像很多人说的那样，笑是最好的药。
）另外，形容词、副词或介词短语也可以用as来引导定语从句：-形容词：such as、same as等（表示“像……这样的”）例如：He likes fruits such as apples and oranges.（他喜欢诸如苹果和橙子之类的水果。
）-副词：as soon as、as far as等（表示“尽早”、“就……来说”）例如：I will let you know as soon as I receive the package.（我一收到包裹就通知你。
As 用法
As 用法••••••••••一、As 用作关系代词1. As 单独用作关系代词。
As 单独用作关系代词时，常用于引导非限制性定语从句，代表主句所表达的概念或主句中某个词所表达的概念。
且As 引导的从句在句中的位置较为灵活，可位于主句之后，也可位于主句之前，有时还可插入主句当中。
As 在从句中可充当主语、宾语或表语。
例如：This elephant is like a snake, as anybody can see.As we all know, he is good at English.As is known to all, he is a famous writer.John, as you know, writes plays.2. As 与其它词搭配用作关系代词。
As 常与the same, such, so, as 等搭配, 构成the same...as, such...as, so...as, as...as 等句型，引导限制性定语从句。
例如：I have the same idea as you (have).Such men as he (is) are rare.They do the same work as I (do).Here is so big a stone as no man can lift.••••注1：As 从句中的be, do, have 等动词常省略, •但如果主句与从句中的动词时态不同或两个动词的形式不同, 这类词就不宜省略。
例如：They are doing the same work as I did last year.They do the same work as she does.••••注2：在the same...as 结构中, same 有两层意思：一是特指的同一个，即前面提到的那一个，而非另一个，其二是指与另一物在某个方面（如外形、性质、内容或数量等）一样，或没有区别，或与过去比没有变化。
关系代词as
关系代词as的用法关系代词as：可指人，也可指物，在从句中可做主语、宾语和表语。
一、引导限制性定语从句常用于下列句式：such+名词+as... 像。
一样的，像。
之类的the same +名词+as... 和。
同样的Eg：Let’s discuss only such questions as are interesting to all of us.He is so good a teacher as I like very much.I have the same trouble as you have.He is not the same man as he was.当先行词在句中做主语、宾语或表语时，同时先行词又被same,so,such修饰时，关系代词用as.注意：such...as...引导的定语从句和such...that...引导的状语从句的区别：He is such a clever boy as everyone likes.He is such a clever boy that everyone likes him.第一个句子中as引导定语从句，因为从句中缺成分；而第二个句子中that引导的状语从句，从句不缺任何成分。
二、引导非限制性定语从句，指代逗号前的整个句子，而不是主句中的某个词。
The match was put off, as/which was exactly what we wanted.He was a doctor, as/which I know from his manner.Which和as引导非限制性定语从句的异同相同点：可指代整个主句，在从句中做主语和宾语，相当于and this 或and that.Eg: The match was put off, as/which was exactly what we wanted. He was a doctor, as/which I know from his manner.不同点：1，位置不同。
As的用法
e) 在非正式文体中,第一个as可以 在非正式文体中,第一个as可以 省略. 省略. Your face looks (as) white as snow. You look (as)pretty as ever. She’s (as)hard as nails.
1.5 as 构成的固定词组
1.作介词用. 1.作介词用. 1)as against 比
4) as from 自…起 The contract shall be in effect as from January 1,1992. 5)as a result of 由于….的结果 由于….的结果 As a result of the heavy snow, all the traffic was stopped. 6) as regards 至于 As regards that , I haven’t decided yet.
The output amounts to ten thousand dollars as against eight thousand last year.
2) as compared with 与…对比
German, as compared with French , is difficult to learn.
4.As构成的固定词组作连词 4.As构成的固定词组作连词
1).according as根据, 按照…而 as根据, 按照… You may go or stay,according as you decide. 2).in as (so)far as 根据…程度 根据… In as (so)far as we can believe the facts,we will use them.
关系代词as的用法总结PPT
此时，as引导的定语从句可置于句首、句中或句尾。
例句
He is so clever as is known to us all.（他如此聪明 ，这是众所周知的。）
as代替主句部分内容
01
定义
as还可代替主句中部分内容，通 常是主句中的一部分谓语或宾语 。
02
03
用法
例句
此时，as引导的定语从句与主句 之间用逗号隔开，表示对主句的 补充说明。
表示“可以说是”或“事实上是”，用于对某一情况进行解释或说 明。
例句
He is, as it were, the most brilliant student in the class.（可以 说，他是班上最聪明的学生。）
as far as
结构
as far as + 名词/从句
用法
表示“就……而言”或“至于”，用于引出某一话题 或范围。
用法
通常将“尽管”放在句首，后面接从句，主 句用逗号隔开。
例句
尽管他很累，但是他还是坚持完成了任务。
表示“即使…”
含义
表示假设的情况或条件，即使这种情况或条件 实现了，也不会影响主句的情况或结果。
用法
通常将“即使”放在句首，后面接从句，主句 用逗号隔开。
例句
即使你不同意我的观点，我也会尊重你的意见。
表示“由于…”
as表示“由于…”时，引导的从句一般放在主句之后，用来补充说明主句所述内容的原因或理由。
as引导的从句可以是限定性的，也可以是非限定性的。如果是非限定性的，则as前面要用逗号与主句 隔开。
04
as引导方式状语从句
表示“如同…”
含义
用于比较两个相似的事物或行为。
关系代词as的用法总结
关系代词as的用法1.用于引导限制性定语从句，主要与such,as, the same连用，在多句中充当主语、宾语、表语as若做准关系代词，只用于下列三个结构中：（准关系代词：既像连接词又像关系词的词）such+n.+ as像……这种的,像……那样的the same+n.+ as 和……相同的as +adj.+n.+as和……一样的……These houses are sold at such a low price as people expected.这些房子以人们期望的这样低的价格出售了。
（as在从句中作宾语）We have found such materials as are used in their factory.我们已经找到了像他们工厂里用的这种材料。
（as在从句中作主语）He is not the same man as he was. 他和过去不同了。
（as在从句中作表语）He smokes as expensive a cigarette as he can afford.他抽一种他买得起的最贵的烟。
（as在从句中作宾语）2.用于引导非限制性定语从句，可位于主句之前或之后，有时也可插在主句中间.as指代整个主句的内容，as表示“正如”。
As you know, she is a stubborn girl, and I can't persuade her to change her mind.你知道，她是一个倔强的女孩，我不能说服她改变主意。
He returned before nine o'clock，as we had expected．正如我们所料，他9点以前回来了。
【拓展】as和which都可以引导非限制性定语从句，并且都指代整个主句的内容，但二者有着明显的区别。
(1)as引导的非限制性定语从句可以放在主句之前、之后或插于主句之中，而which引导的非限制性定语从句只能放在主句之后。
as用法小结PPT教学课件
• as rich as a Jew
•
…
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2. as用作连词引导时间状语从句
• as与when，while都是引导时间状语从句的从属连词，含义都是"当……的 时候"。但它们有区别：用when时，从句的动作可以与主句的动作同时发生， 也可以先于主句的动作发生；用while时，从句的动作为一过程，主句动作与 从句动作同时进行或在从句动作过程中发生；用as时，主句和从句的动作同 时发生，具有延续的含义。
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D is generally accepted, economical
growth is determined by the smooth development of production. A. What B. that C. it D. As
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C is known to the world, Mark Twain
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• (1)It was snowing when he arrived at the construction site.他到达 工地时，天正在下雪。
• (2)He was watching TV while his mother was cooking.他母亲做饭时 他在看电视。
从句用倒装语序；however引导让步状语从
句时，它的后面可跟形容词或副词，也要用倒
装语序。
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• (1) Although he is quite old, he still jogs ever y day. 他虽然年纪 相当大，仍然每天慢跑。
• (2) Strange as it may seem, nobody was injured in the accident.这次意外虽然显得令人不可思议，却没有人受伤。
as 用法
1。
as是连词，表示“随着”的意义。
lives是life的复数，意义是“生活”。
<BR>2。
as是连词，表示“因为，由于”的意义。
wanting是现在分词，表示主动意义，wanting to buy cars=who want to buy cars。
As的用法小结as可以作连词、介词及关系代词和副词。
现将其用法小结如下:（一）、as作连词的用法:1.作“在-------期间，当----的时候”引导时间状语从句.注意与when、while的用法区别。
①下列情形时,只用as, 而不用when或while。
1)用于表示同一个人的两种动作交替进行,指一边----一边. 如:The girl sings as she goes to school.He looked behind occasionally as he went forward in the forest.2)表示两个同步发生的动作或行?意思是随着-----的发展.如:As time went on / by, she became more and more beautiful .As children get older, they become more and more interested in everything.3)表示两个短暂行为或事情几乎同时发生.如:I watched her as she read the book.I thought of it just as you opened your mouth.Just as the flying worm hit her face, she gave a loud cry.4)接在名词后面表示某一个年龄段时.如:As a young man, he was active in sports.②when作"当……的时候"解,可以指较短的(一点)时间,也可指一段时间。
as 的用法总结
关系代词as的用法
关系代词as的用法关系代词“as”的用法引言：关系代词是语法中一类重要的词性，它连接并引导一个从句与主句之间的关系。
其中，关系代词“as”在句子中起着重要的作用。
本文将一步一步回答关系代词“as”的用法，旨在帮助读者更好地理解和使用这一关键词。
一、作为连词的用法1. 作为连词，as 可以引导一个时间从句。
例如：As I was walking home, I saw a shooting star.（当我走回家的时候，我看到了一个流星。
）2. 作为连词，as 可以引导一个方式从句。
例如：She danced gracefully, as if she were floating on air.（她优雅地跳舞，仿佛漂浮在空中。
）3. 作为连词，as 可以引导一个原因从句。
例如：As he was feeling tired, he decided to take a nap.（因为他感到累了，他决定小睡一会。
）4. 当主句和从句的主语一致时，也可以使用as 连词。
例如：As a teacher, I understand the challenges of the education system.（作为一名教师，我了解教育系统的挑战。
）二、作为关系代词的用法1. 关系代词as 可以引导一个限制性定语从句。
例如：The book, as I mentioned before, is a great source of information.（正如我之前提到的，这本书是一个很好的信息来源。
）2. 关系代词as 也可以引导一个非限制性定语从句。
例如：Mary loves reading, as many book lovers do.（玛丽喜欢阅读，就像许多书迷一样。
）3. 关系代词as 也可以引导一个表语从句。
例如：He acted as if he were the boss.（他表现得好像他是老板一样。
关系代词as的用法
1. It rained hard yesterday, _____Bprevented us from going to the park. A. that B. which C. as D. it
2.___B___ is mentioned above, the number of the students in senior school is increasing. A. Which B. As C. That D. What
I shall do it in the same way as you did. The earth is round.
As is known to all, the earth is round. 不填 D.
That;advancing
B.
This was natural(自然的;正常的)
Chongqing is not the same city _______ we have seen in other places.
This was natural(自然的;正常的)
Chongqing is not the same city _______ we have seen in other places.
掌握as能充当的成分,引导从句的类型以及和which在引导非限定性定语从句的区别.
This was natural(自然的;正常的)
I want to have such a dictionary as he has.
They hope to get such a tool ___ he is using
that, are D.
as
C.
This book is not such _____I hope.
as用法
as可以作连词、介词及关系代词。
一、 as作连词的用法:
1. 作“当……的时候”,引导时间状语从句。 (注意与when、 while的用法区别)
A) 用于表示同一个人的两种动作交替进行,指"一边……,一 边……"。如: The girl dances as she sings on the stage. He looked behind from time to time// as he went forward. B)表示两个同步发展的动作或行为,译为"随着……"。如: As time went on / by, she became more and more worried. As children get older, they become more and more interested in the things around them. C)表示两个短促行为或事件几乎同时发生。如: I thought of it just as you opened your mouth. Just as the flying worm hit her face, she gave a loud cry.
3. as作“像”、“按照…的方式”解,引导方式 状语从。 =in the way that
He speaks English as Americans do. When in Rome, do as Romans do. Zhoukai went and did as he was told
4. 作“虽然”、“尽管”讲,引导让步状语从句。 常用倒装语序,即： adj. /adv. / n.+ as +主语+谓语+其他。
关系代词as的经典用法
关系代词as经典用法关系代词as既可以引导限制性定语从句，也可以引导非限制性定语从句，as在从句中作主语、宾语或表语。
引导限制性定语从句常用于下列句式：其中关系代词as在从句中担当主语、宾语或表语。
We have found such materials as are used in their factory.我们已经找到了像他们工厂里用那种材料。
(as作主语)These houses are sold at such a low price as people expected.(as作宾语)这些房子以人们期望低价出售。
He is not the same man as he was.他和过去不同了。
(as作表语)4.关系代词as，which区别(1)as引导非限制性定语从句，既可在主句前，又可在主句后，有时还可插入主句中，而which 引导非限制性定语从句只能置于主句之后。
相同是两者都可替代主句整个内容，而不是主句中某一个词。
The weather turned out to be very good，which was more than we could expect. (2009·山东高考)Whenever I met her，was fairly often，she greeted me with a sweet smile.A.whoB.whichC.whenD.that选句意：不管我何时遇见她，她都用甜甜微笑迎接我，这是常事儿。
which引导非限制性定语从句，指代前面句子。
故选B。
(2)当非限制性定语从句放在主句前面时，只能用as。
As is known to everybody，the moon travels round the earth once every month.＝The moon travels round the earth once every month，as/which is known to everybody.＝It is known to everybody that the moon travels round the earth once every month.＝What is known to everybody is that the moon travels round the earth once every month.后两句属名词性从句范畴。
关系代词AS的用法
关系代词AS的用法关系代词as引导定语从句时，既可以单独使用，也可以与其他词连用，其用法要比that 和which更为复杂。
同学们要下点功夫哦!AS作关系代词,可以用来引导定语从句:限制性定语从句和限非制性定语从句一、AS引导限制性定语从句AS引导限制性定语从句时,通常和such,the same,as(so)等连用,构成如下结构:such...as/such as,the same...as/the same as, as(so)...as等结构,在从句中可作主语,宾语和表语。
...as/such as意为“...的那种...,像那样的”，such...as/such as引导限制性定语从句时,既可指人,也可指物。
such用于名词之前时,具有形容词性质；such单独使用(即后面不接名词)时,具有代词性质。
Don’t trust such men as praise you to your face.(as作主语)不要相信那种当面吹捧你的人。
You should read only such books as you can understand without much difficulty.(as作宾语)你应当只读那些你读起来不太难懂的书。
Associate with such as will improve your manners.(as作主语)要和能改善你的言行的那种人结交。
same...as/the same as意为“与...同样的”,和such一样,the same既有形容词作用,又有代词性质。
We have arrived at the same conclusoin as they have.(as作宾语)我们已得出和他们同样的结论。
比较:the same...as和the same...that不同,前者是“同那一个相似”,后者是“正是那一个”。
如：This is the same watch as I lost.这同我丢的那块表一样。
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2020/11/8
It has been said above. Grammar is a set of dead rules.
The Attributive Clause
定语从句
本课学习内容:
定语从句中的关系代词as的用法； as 和which的区别
学习要求:
掌握as能充当的成分,引导从句的 类型以及和which在引导非限定性定语从 句的区别.
重点：as的具体用法
难点： as 和which引导非限定性定语从 句的区别.
2020/11/8
2020/11/8
Please compare:
This is the same pen as I lost.
这本书和我丢的那本一模一样。
This is the same pen that I lost.
这本书就是我丢的那本。
2020/11/8
Please complete the following sentences and compare:
Grammar is a set of dead rules,as /which has been said above. As has been said above,grammar is a set of rules.
2020/11/8
I want to have such a dictionary as he has. I shall do it in the same way as you did. I like the same book as you do.
这本书如此有趣，大家都喜欢。(结果状语从句)
2020/11/8
1. It rained hard yesterday, _____Bprevented us from going to the park. A. that B. which C. as D. it 2.___B___ is mentioned above, the number of the students in senior school is increasing. A. Which B. As C. That D. What
2020/11/8
3. Chongqing is not the same city _______Dwe have seen in other places. A. that B. which C. 不填 D. as
A 4.Such signs _____we use in the experiment ______Greek letters. A. as ,are B. as, is C. that, are D. that, is
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He married Jenny. This was natural(自然的;正常的) He married Jenny ,as /which was natural. As was natural,he married Jenny
2020/11/8
She is very good at dance. Everybody knows this.
2020/11/8
7.It was raining,__D___was a pity. A.what B.that C.as D.which
8.My village is no longer the same _B__ it used to be. A.which B.as C.where D.when
This is such an interesting book __a_s_ we all like. This is so interesting a book __a_s句)
This is such an interesting book __t_h_at we all like it. This is so interesting a book __th__at we all like it.
人小鬼大的 as
The earth is round. It is known to all. The earth is round, as is known to all. As is known to all, the earth is round. The earth is round, which is known to all.
2020/11/8
(94 NMET) _______ is known to all, China will be an
_____powerful country in 20 or 30 years’ time. A.That;advancing B. This;advanced C. As;advanced D. Which; advanced
Key: C
2020/11/8
5.I passed him a large glass of whisky, __C___ he drank immediately . A.that B.as C.which D.who 6.They hope to get such a tool _C__ he is using A.where B. that C.as D.which
2020/11/8
9.__A__s__is reported in the newspapers, talks between
2020/11/8
The experiment is very important, as indeed it is As is known to all, he is the best student in our class As we all know, he works very hard.