小学英语小升初必会语法As的用法

这篇关于小学英语小升初必会语法As的用法，是 特地为大家整理的，希望对大家有所帮助！

一、作副词，意为“相同地”，“同样地”。例如：

　They don’t have as many airplanes. 他们没有同样多的飞机。

　二、作连词，

　1. 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:

　(1). when作“当……的时候”解，可以指较短的(一点)时间,也可指一段时间。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。例如:

　John was having his dinner when I saw him. 当我看到约翰的时候，他正在吃饭。

　She can write only when the baby is asleep. 只有婴儿睡着的时候，她才能写作。

　(2). while常表示一段较长的时间或一个过程，强调主句谓语动词与从句谓语动词同时发生或在从句动作过程中发生。例如:

　We must strike while the iron is hot. 要趁热打铁。

　While we were reading, the teacher came in. 我们正在读书的时候，老师走了进来。

　(3). 但属下列情形时，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……”。例如:

　The girl dances as she sings on the stage.那个女孩在舞台边唱歌边跳舞。

　He looked behind from time to time as he went forward. 当他朝前走时，不时地向后看。

　② 表示两个同步发展的动作或行为,译为“随着……”。例如:

　As time went on / by, she became more and more worried. 随着时间的流逝，她变得越来越焦虑。

　As he grew older, he became more intelligent. 随着他年龄的增长，他变得更有才智了。

　③ 表示两个短促行为或事件几乎同时发生。例如:

　I thought of it just as you opened your mouth. 恰好在你开口时，我想到了它。

　Just as the flying worm hit her face, she gave a loud cry. 恰巧在飞虫撞到她脸上时，她大哭起来。

　2. 引导原因状语从句

　as，because，since都可以表示因果关系，连接原因状语从句，含义是“因为，由于”，但它们有区别：because表示的语气;as一般放在句首，语气较弱，较口语化;since常常用在书面语中，表示多为对方已知的、或稍加分析便可得知的原因，有时可译作“既然”。例如：

　I do it because I like it. 我做这件事是因为我喜欢。

　Since many of the customers work during the day, Billy has to collect the money at night. 因为许多顾客白天上班,所以毕利只好晚上去收钱。

　As she has been ill perhaps she'll need some help. 她由于生病可能需要些帮助。

　3. 引导让步状语从句

　as与although (或though)，however (或no matter how)等都可以引导让步状语从句，含义是“虽然，尽管”，但它们有区别：although语气稍正式些，可放在句首，也可放在句中，主句中不能再用 but，但可以用yet;as所表示的语气较强，引导的让步状语从句用倒装语序;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。例如：

　Although they are poor they are happy. 虽然他们很穷，但很快乐。

　Angry as he was, he managed to speak calmly. 虽然他很生气，但是他讲话很平静。

　However hard the question is, he can answer it. 不管问题有多难他都能回答。

　注意：当as引导让步状语从句时，句子的倒装语序有以下三种形式：

　(1). 形容词或副词+as+主语+连系动词be或实义动词。例如：

　Rich as he is, he never spends a cent on clothes. 虽然他很富有，但他从不花一分钱在衣服上。

　Much as I admire his courage, I don’t think he acted wisely. 我虽然佩服他的勇气，但我认为他这样做是不聪明的。

　(2). 名词+as+主语+连系动词be (注意句首的名词不带冠词)。例如：

　Child as he is, he knows a lot. 尽管他是个孩子，但懂很多事情。

　Boy as he was, he was chosen king. 尽管他还是个孩子，但却被立为国王。

　(3). 实义动词+as+主语+助动词[如果没有助动词，则要加上一个do(does或did)]。例如：

　Try as he may, he never succeeds. 尽管他很努力，但总是不成功。

　Change your mind as you will, you will gain no additional support. 即使你改变主意，你也不会得到另外的支持。

　4. 引导方式状语从句，意为“如”，“像”，“按照……的方式”。如:

　I want you to tell my friend your very interesting experience exactly as you have told it to me. 我想让你像给我讲述的那样，给我的朋友讲一讲你那段极其有趣的经历。

　Remember, you must do everything as I do. 记住，你必须按照我做的那样做一切。

　注意：like在非正式语体中可以有与as相同的用法。如：

　I can’t sing like I used to.我不能像以前那样唱歌了。

　He writes just like his brother did when he was young. 他现在写文章正像他哥哥年轻时写文章一样。

　5. 引导比较状语从句,用于“as...as...或 not so/ as...as...”中,前一个as是副词,后一个as是连词，意为“如(不如)…一样”。如:

　(1). You hate her as much as I (=as I hate her).

　(2). I don't speak English so/ as well as he does.

　注意：句中连词as后面的代词实际是省略了与主句相同的部分，即例(1)可以写成You hate her as much as I hate her. 如果很明显就能看出所省略的部分，意义不会含糊不清时，在口语中也可以用代词的宾格形式。例：At your age you can’t expect to play football as well as me (= as I do).但例(1)就不能改I为me，改后意思就变为：You hate her as much as you hate me. 你恨她像恨我一样深;而原句的意思为：你恨她像我恨她一样深。

　三、作代词

　as作关系代词的用法

　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。

　1. as引导定语从句与其他词连用

　(1). 用于the same...as结构中

　This is the same watch as I have lost. 这块手表跟我丢失的那块一样。

　(2). 用于such...as结构中

　I don’t like such novels as you recommend. 我不喜欢你推荐的那些小说。

　(3). 用于"so +adj. + a/an + n. (单数) + as "结构中

　I am not so strong a man as I was. 我已经没有从前那么强壮了。

　2. as单独引导定语从句

　as单独引导定语从句时，先行词可以是一个词，也可以是一个句子或短语。例如：

　(1) She is late, as is often the case. 她迟到了，这是经常的事。(先行词是整个主句)

　(2) To shut your eyes to facts, as many of you do, is foolish. 对事实视而不见--你们好多人都是如此的愚蠢。(先行词是不定式短语)

　注意1：(1). 当as引导的定语从句位于具有否定意义的主句之前时，as从句所修饰的范围是整个主句的内容，也就是说，把否定意义也包括在内。例如：

　As has been said above, grammar is not a set of dead rules. 正如前面所说，语法不是一套死条文。

　(2). 当as引导的定语从句位于具有否定意义的主句之后时，as从句所修饰的范围不包括否定意义。例如：

　Spiders are not insects, as many people think. = Spiders are not insects. But many people think they are. 许多人认为蜘蛛是昆虫，但蜘蛛并不是昆虫。

　(3). 当as引导的定语从句位于具有否定意义的主句中间时，as从句所修饰的范围也不包括否定意义。例如：

　She did not, as her friend had feared, open the case. 她没有打开盒子，而她的朋友就是怕她当面打开盒子。

　注意2: 当修饰句子的非限制性定语从句位于句尾时，as可以用which来替代。例如：

　I live a long way from work, as (which) you know. 我住得离工作单位很远，这你是知道的。

　但是，当as从句位于句首或句中是，as就不能用which来替代了。例如：

　As you will find out, I will never let you down. 你将会发现，我绝不会使你失望的。

　Taiwan is, as you know, an inseparable part of China. 你们知道，台湾是中国不可分割的一部分。

　此外，如果主句为否定句，则位于句末和句中的as从句所修饰的范围并不包括主句的否定意义，此时，as也不能用while来替代。例如：

　Greenland was not a continent, as people thought. 格陵兰并不像人们所想象的那样是一个大陆。

　四、作介词，

　1. 表示 “好像(某人)”，例如:

　They entered the building disguised as cleaners. 他们化装成清洁工人的模样进入大楼。

　2. 表示“作为，当作”，例如：

　I found a job as a teacher. 我找了一份教师的工作。

　3. 表示“当某人是(某身份)时。例如：

　As a child, she was sent to three different countries. 她儿时去过三个不同的国家。

　4. 表示“因某人是(某身份)”，例如：

　As her private secretary he has access to all her correspondence. 他是她的私人秘书，能接触到她所有的信件。

　注意1：as引导的介词短语大多用作状语，as译为"作为"，少数情况可引起宾语补足语。例如:

　As a Party member, I'll take the lead in everything. (状语)

　She works as a nurse. (状语)

　Tom has me as one of his best friends. (引起宾语补足语)

　注意2：as和like都可以作介词，但意义不同。as表示“以实际的身份或地位”。 like则表示“与…相似，以与…相类似的方式”。例如：

　(1). He spoke as a teacher.

　(2). He spoke like a teacher.

　句(1)的意思是：“他作为老师发言”或“他以老师的身份发言”。句(2)的意思是：“他讲话很像是老师”。

　五、用于一些固定搭配

　1. as good as差不多，几乎

　Don’t worry, the matter’s as good as settled. 别担心，问题差不多已经解决了。

　When the car was repaired, it looked as good as new. 这辆汽车修理好的时候，看起来差不多就像新的一样。

　2. as if /as though 似乎;好像

　He behaved as if nothing had happened. 他装着若无其事的样子。

　She treats him as though he was her own son. 她待他好像待自己的儿子一样。

　另外，as if可以接一个动词不定式短语。例如：

　He waved his hand to me as if to have something to tell me. 他向我挥手好像有什么要告诉我。

　3. as well as 同(一样也);和;还

　Joan can speak Chinese as well as English. 琼能讲英语还能讲汉语。

　He spent all his money, as well as wasting his time. 他不仅浪费了时间，还花光了他所有的钱。

　4. such...as, such as 像……这样的

　I bought a lot of fruits, such as apples, oranges, bananas and so on. 我买了许多种水果，像苹果，桔子，香蕉等。

　We had such books as you never saw. 我们有一些你从未看过的书。

　5. as for 至于某人(某事物)

　We had a delightful weekend in the country. As for the traffic, we had no difficulty. 在乡下我们度过了一个愉快的周末。至于交通，我们没遇到任何困难。

　6. as to 关于某事物;提到某事物

　I don't know anything as to the others. 至于其他，我一无所知。

　7. so as to ... 以便, 为了

　Students should take notes so as to make revision easier. 学生应当记笔记，以便容易复习。

　8. as a matter of fact 其实;实际上

　As a matter of fact, I’m very fond of housework. 其实，我很喜欢做家务。

　9. as a result 结果 (发生某种情况)

　As a result， he had been given an excellent job. 结果，他得到了一份极好的工作。

　10. as long as 只要

　You may borrow this book as long as you promise to give it back. 只要你答应归还，你就可以把这书借走。

　总之，通过以上的分析，我们对as的词性和用法有了比较全面的理解和把握，才能在实际的运用中做到心中有数，应付自如。

　巩固练习

　1. She had a tense expression on her face, ________she were expecting trouble.

　A. even though B. even as C. as though D. now that

　2. A good many proposals were raised by the delegates, ________was to be expected.

　A. that B. what C. so D. as

　3. ________might be expected, the response to the question was very mixed.　　A. As B. That C. It D. What

　4. Americans eat ________as they actually need every day.

　A. twice as much protein B. twice protein as much

　C. twice protein as much D. protein as twice much

　5. The trumpet player was certainly loud. But I wasn't bothered by his loudness ________by his lack of talent.

　A. than B. more than C. as D. so much as

　6. Studies show that the things that contribute most to a sense of happiness cannot be bought, ________a good family life, friendship and work satisfaction.

　A. as for B. in view of C. in case of D. such as

　7. ________he works hard, I don't mind when he finishes the experiment.　　A. As soon as B. So far as C. As well as D. As long as

　8. ________the danger from enemy action, people had to cope with a severe shortage of food, clothing, fuel and almost everything.

　A. As long as B. As far as C. As soon as D. As well as

　Key: 1-5 CDAAD 6-8 DDD

　高考真题直练

　1. It is generally believed that teaching is ______it is a science.

　A. an art much as B. much an art as

　C. as an art much as D. as much an art as

　2. She doesn't speak ______her friend, but her written work is excellent.

　A. as well as B. so often as C. so much as D. as good as

　3. The piano in the other shop will be ______, but ______.

　A. cheaper; not as better B. more cheap; not as better

　C. cheaper; not as good D. more cheap; not as good

　4. After supper she would sit down by the fire, sometimes for ______an hour, thinking of her young and happy days.

　A. as long as B. as soon as C. as much as D. as many as

　5. With the help of the German experts, the factory produced ______ cars in 1993 as the year before.

　A. as twice many B. as many as twice

　C. as twice as many D. twice as many

　6. After the new technique was introduced, the factory produced______ tractors in 1988 as the year before.

　A. as twice many B. as many twice C. twice as many D. twice many as

　7. ______, he doesn't study well.

　A. As he is clever B. He is as clever C. Clever as he is D. As clever he is

　8. ______, he was unable to make much progress.

　A. Hard as he try B. Hard as he tried

　C. As he tried hard D. He tried hard

　9. Tom kept quiet about the accident ________ lose his job.

　A. so not as to B. so as not to C. so as to not D. not so as to

　10. When a pencil is partly in a glass of water, it looks as if it ______.

　A. breaks B. has broken C. were broken D. had been broken

　11. ________ is known to everybody, the moon travels round the earth once every month.

　A. It B. As C. That D. What

　12. ________ is known to all, China will be an ________ and powerful country in 20 or 30 years' time.

　A. That; advancing B. This; advanced C. As; advanced D. It; advancing

　13. He doesn't believe ________things ________ you do.

　A. the same; as B. the same; with C. as same; as D. as same; with

　14. ________ is mentioned above, the number of the students in senior high schools is increasing.

　A. Which B. As C. That D. It

　Key: 1-5 DACAD 6-10 CCBBC 11-14 BCAB

since的用法：译作“自从…以来”

(1)接时间点：如 I have stayed in that country since 1995. 要求：谓v.用现在完成时，而且须是延续性动词。

接一段时间 + ago：如 They have lived in that house since two years ago. 要求：谓v.用现在完成时，而且须是延续性动词。

接时间状语从句：如 I have loved her since I met her last time. / Lily has stayed at home since she left school. 要求：主句的谓v.用现在完成时，而且须是延续性动词；从句的谓v.用一般过去时，而且须是终止性动词。

(4)用于句型“It’s / It has been + 一段时间 + since + 时间状语从句”中，译作“自从…以来, 已经…(时间)了”。如 It’s / has been three months since he moved to this city. 要求：主句的谓v.用一般现在时或现在完成时；从句的谓v.用一般过去时，而且须是终止性动词。

(5)用于句型“一段时间 + has passed since + 时间状语从句”中，译作“自从…以来, … (时间)已经过去了”。如上个例句还可写成：Three months has passed since he moved to this city. 要求：主句的谓v.用现在完成时，而且动词必须是has passed；从句的谓v.用一般过去时，而且须是终止性动词。

(6)注：当since用于否定句时，主句的谓v.可以是终止性动词。如 He hasn’t seen the film since last month.

(7)相关词组：“从那时起”：ever since、since then、from then on. 注：ever since作为一个词组，放句尾可单独使用。如I have given up smoking ever since. 另外，还可在since后接句子。since前加ever，只是加重语气而已。如 I have given up smoking ever since I caught a bad cough.

(8) since还可引导原因状语从句，译作“由于；因为”，相当于because。如 Since he was lazy, he didn’t finish his homework.

therefore adv.因此, 所以=for that reason=consequently常用于连接两个并列分句，其前加“and”或分号“;”。

He was ill, and therefore could not come. 他病了, 所以未能来。

He has broken his leg and therefore he can't walk.他摔坏了腿，因此不能走路了。

We do not have enough money. Therefore we cannot afford to buy the new car.我们的钱不够,因此买不成这辆新车。

so conj. adv因而, 所以, 结果是

It was late, so we went home. 天晚了, 所以我们就回家去了。

He was sick, so they were quiet.他病了，所以他们很安静。

hence adv.因此, 从此

The town was built among the hills, hence the name Hilltown. 该城镇修建在群山之中,故取名'山城'。

It is very late; hence you must go to bed.时间已经很晚了，因此你必须睡觉去。(记住前面是分号，而不是逗号)

then adv因此，就 Go into the cave, then they won't see you. 躲进洞里去，那他们就看不到你了。

5、accordingly adv.因此, 从而;所以，因此结果;因此(偶作连词使用conj.)

He was asked to leave the city and accordingly he went.有人叫他离开该城市,所以他就走了。 You may arrange accordingly.你可以权宜处理。

Mr Foster has never been to China. Consequently / Hence he knows very little about it.福斯特先生从未去过中国,所以对中国了解得很少。

My car was broken down and consequently I was late. = in consequence

Thus adv.如此，像这样;因此;于是

He sold his farm and thus he had enough money for his journey.他卖掉了农场，这样他就有足够的钱旅行了。

There has been no rain - thus, the crops are drying.天没下雨，因此庄稼要枯死了。

already 和yet的区别用法

already 和yet都是表示时间的状语副词。都表示“已经”，也都用于完成时。但already 一般用于肯定句中而yet一般用于否定句和疑问句中。

eg : I have already finished my homework . 我已经完成我的作业了。

Have you finished your homework yet ? 你已经完成作业了吗？

No , I haven’t finished it yet. 不，没完成。

as可用作连词，引导比较、时间、原因及方式等四种状语从句，应注意的是，引导的比较状语从句往往有省略;引导的时间状语从句一般用一般现在时而不用一般将来时;引导原因状语从句时与“Because”和“since”引导的从句比较起起来语气最弱。

as作介词，意思时“作为”，“以……身份”。例如:He came to China as a tourist five years ago.

而表示像…一样时，like通常作介词用，而介词后面通常接名词，代名词和动名词。

as in Australia“和在澳大利亚一样”。

as……as AS +adj(原级)+AS AS +adv(原级)+AS

as soon as 一……就 as soon as possible 尽可能快地 as early as possible 尽可能早的

as carefully as you can 尽可能认真地

1。as是连词，表示“随着”的意义。lives是life的复数，意义是“生活”。

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:

、 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。如:When I was at college, I could speak several foreign languages. When the clock struck twelve, I had slept for 2hours. ③ while常表示一段较长的时间或一个过程,强调主句谓语动词与从句谓语动词同时发生。如:Work while you work. Play while you play.

As =Since 作"既然"、"由于"解,引导原因状语从句,常用来表示已为人们所知或显而易见的原因或理由。如: As he’s been ill for ages, I will help him. As / Since you're not feeling well, you may stay at home. As he wasn't ready , we went without him.

As =in the way that作"像"、"按照……的方式"解,引导方式状语从句。如: Do as I told you. Remember, you must do everything as I do.

用于as--- as或not / so/ as ---- as中,前一个as是副词,后一个as是连词,引导比较状语从句。如:They helped the old as much as possible. I don't speak English so/ as well as she does.

表示虽然,尽管 等,引导让步状语从句,常用倒装语序,模式为: adj. /adv. / n.+as +主语+谓语+主句。如: Young as he is, he knows much. Tired as they were, they walked on.

表示也------一样。 She is a doctor, as was her husband. (二)、 as作关系代词,引导定语从句,表示正如,这一点.如: He is very careful, as we all know. As is well-known, Taiwan belongs to China. 另外,当先行词被the same, such等词修饰时,常用as来引导定语从句。如: Such a clever girl as she can learn anything quickly. I was reading the same book as he bought yesterday.

as作介词的用法. 1.表示好像。如:He dressed as a policeman. 2. 表示作为当作。如:I found a job as a guide. 3. 当某人是某身份时。如:As a child , she was sent to abroad. 4. as引导的介词短语大多用作状语,as译为"作为";少数情况可引起宾语补足语。如: As a Party member, I'll take the lead in everything. (状语) She works as a model. (状语) She has me as one of her best friends.(引起宾语补足语) (

作副词的用法 1 表示与------等同。如:This dress is twice as expensive as that one. 2 像，如等。如:As before, he remained unmoved.

although 与 though的用法区别

用作连词 表示“虽然”，两者大致同义，可换用，只是 although 比 though 更为正式: Though [Although] it was raining，we went there. 虽然下着雨，但我们还是去了那儿。

Though [Although] it was barely four o’clock, the lights were already on. 尽管才四点钟，灯已经亮了。

Though [Although] we are poor, we are still happy. 我们虽然穷，仍然很快活。

二、用作副词 although 一般不用作副词，而 though 可用作副词，且一般放在句末(不放在句首)，意为“可是”、“不过”:

It’s hard work; I enjoy it though. 工作很辛苦，可是我乐意干。

He is looking fit, though. 但他看起来很健康。

You can count on him, though. 不过你可以指靠他。

三、用于习语 在 as though(好像，仿佛)，even though(即使，纵然)等固定短语中不能用 although:

She closed her eyes as though she were tired. 她闭上眼，仿佛很疲劳似的。

We felt as though we had witnessed the whole thing. 我们感到仿佛目击了整个这件事似的。

He is an honest man, I must say, even though I have opposed him. 尽管我反对过他，我还得说他是一个诚实的人。

She was always afraid of men, even though she had lots of boyfriends.尽管她有很多男朋友，她总是害怕男人。

四、用于倒装 though 引导的让步状语从句可用部分倒装的形式(注意:倒装后位于句首的名词之前不用冠词)，但 although 一般不这样用:

Poor though I am, I can afford it. 我虽穷，但这东西还是买得起的。

Child though he was, he did quite well. 他虽是孩子，但干得很好。

另外注意: 1. although较正式，语气强 Although he was tired, he went on working.

2. although引导的从句放在主句前后均可，有时还可放在句中。

Although many difficulties are still ahead, we are determined to make greater achievements. 尽管在前面的道路上还有许多困难，但是，我们决心要取得更大的成就。

He often helps me with my English although he is quite busy. 尽管他相当忙，但是还常常帮我学英语。

3. although引导的从句不能与but, however连用，但可与yet, still连用。

不能说:Although he was old, but he worked hard. 应把but去掉。

当然，保留but而去Although也可。 注意:although 的几不: although不能指假设的情况 although不能作并列连词 although不能作副词，放在词尾常用连词介绍.

鹏仔微信 15129739599 鹏仔QQ344225443 鹏仔前端 pjxi.com 共享博客 sharedbk.com