1、As 的用法小結as 可以作連詞、介詞及關系代詞和副詞。現將其用法小結如下:（一）、as 作連詞的用法:1. 作 “在 期間，當 的時候 ”引導時間狀語從句. 注意與 when 、 while 的用法區別。下列情形時,只用as, 而不用 when 或 while 。1） 用于表示同一個人的兩種動作交替進行,指一邊 一邊 . 如 :The girl sings as she goes to school.He looked behind occasionally as he went forward in the forest.2）表示兩個同步發生的動作或行為,意思是隨著的發展 .如 :As t

2、ime went on / by, she became more and more beautiful .As children get older, they become more and more interested in everything.3）表示兩個短暫行為或事情幾乎同時發生.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）接在名詞后面表示

3、某一個年齡段時.如 :As a young man, he was active in sports. when 作 "當 的時候 "解 ,可以指較短的（一點）時間 ,也可指一段時間。如:When I was at college, I could speakseveral foreign languages. When the clock struck twelve, I had slept for 2hours. while 常表示一段較長的時間或一個過程,強調主句謂語動詞與從句謂語動詞同時發生。如:Work while youwork. Play while you

4、play.2. As =Since 作 "既然 "、 "由于"解 ,引導原因狀語從句,常用來表示已為人們所知或顯而易見的原因或理由。如: Ashe s been ill for ages, I will hel p him.As / Since you're not feeling well, you may stay at home.As he wasn't ready , we went without him.3. As =in the way that 作 "像 "、 "按照 的方式 "解

5、,引導方式狀語從句。如:Do as I told you.Remember, you must do everything as I do.4. 用于 as- as 或 not / so/ as as 中 ,前一個 as 是副詞 ,后一個 as 是連詞,引導比較狀語從句。如 :They helpedthe old as much as possible.I don't speak English so/ as well as she does.5. 表示雖然,盡管 等 ,引導讓步狀語從句,常用倒裝語序,模式為:adj. /adv. / n.+as + 主語+謂語+主句。如: Young

6、 as he is, he knows much.Tired as they were, they walked on.6. 表示也 一樣。 She is a doctor, as was her husband.（二）、as 作關系代詞,引導定語從句,表示正如,這一點.如 :He is very careful, as we all know.As is well-known, Taiwan belongs to China.另外,當先行詞被the same, such 等詞修飾時,常用as 來引導定語從句。如:Such a clever girl as she can learn anyt

7、hing quickly.I was reading the same book as he bought yesterday.（三）、as 作介詞的用法.1. 表示好像。如:He dressed as a policeman.2. 表示作為當作。如：I found a job as a guide.3. 當某人是某身份時。如：As a child , she was sent to abroad.4. as 引導的介詞短語大多用作狀語,as 譯為"作為"少數情況可引起賓語補足語。如:As a Party member, I'll take the lead in

8、everything. （ 狀語 ）She works as a model. （ 狀語 ）She has me as one of her best friends.（ 引起賓語補足語）（四）、作副詞的用法1 表示與 等同。如：This dress is twice as expensive as that one. 2 像，如等。如：As before, he remained unmoved.總之，通過以上的分析，我們對as 的詞性和用法有了比較全面的理解和把握，才能在實際的運用中做到心中有數，應付裕如。1） as作副詞，表示程度，意為“同樣地 ”。在“ as as ”， “ not a

9、s as ”結構中的第一個as是副詞，作“和與 （不 ）一樣 ”解。eg：Jack is as tall as his father杰克和他的父親一樣高。He doesn't speak English as so fluently as you 他的英語說得不如你流利。2） as作介詞。1 作 “如，像 ”解。eg：They got united as one man他們團結得像一個人一樣。2作“充當，作為”解。eg：As a writer ， he was famous作為作家，他是很有名的。3） as作連詞，常用來連接主句和狀語從句。1 引導時間狀語從句，作“當 的時候”解，有

10、“隨著 ”之意，與while 意義相近，強調兩個動作同時發生；或某事一發生，另一事立即發生。eg：He shouted aloud as her ran along他一邊往前跑，一邊高聲地呼喊。I was startled as he opened the door他一開門，我嚇了一跳。as 作連詞，相當于when。 eg；As a little boy （When he was a little boy）he began to learn to play piano 他小時候就開始學彈鋼琴。2引導原因狀語從句，作“因為，由于”解，與 because的用法相近。eg；I must stop w

11、riting now ， as I have rather a lot of work to do 我必須停筆了，因為我還有許多工作要做。3引導方式狀語從句或比較狀語從句，作“正如，（如 ）像 ”解。例eg：As in your country ， we grow wheat in the north and rice in the south 正如（像 ）你們國家一樣，我們在北方種小麥，在南方種大米。（方式狀語從句）When at Rome， do as Romans do入鄉隨俗。（方式狀語從句）4引導讓步狀語從句，作“雖然，盡管”解。這時從句常用倒裝語序，即把從句中的表語、狀語或動詞原形

12、放在as 之前。eg；Strange as it may seem， it is true盡管這事看上去很奇怪，但卻是真的。Try as he might ， Tom could not get out of the difficulties 不管怎樣努力，湯姆還是擺脫不了困境。4） as作關系代詞。1 引導限制性定語從句，用在“ such as” , “ the sam eas”， “ as as”等結構中，常譯作 “像 一樣的人（或物 ）”， “凡是 的人 （或物 ）”。例eg：He wished to be such a man as Lei Feng was他曾希望做一個像雷鋒那樣的人

13、。My hometown is no longer the same as it was 我的家鄉再也不像過去一樣了。2引導非限制性定語從句，用來指代它前面的整個句子（即先行句），意思是“這一點 ”。這個分句可以位于句首、句中或句末。eg：As is well known ， oceans cover more than 70of the earth我們知道，海洋占地球面積的百分之七十以上。五）含 as的固定詞組的用法2 as soon as作 “一 就 ”解，引導時間狀語從句。eg：As soon as I get to Beijing ， I'll write to you 我一到

14、北京，就給你寫信。3 as so long as 作 “只要 ”解，eg；As So long as you study hard ， you'll make progress 只要你努力，你就會取得進步。4 as if though 常用來引導方式狀語從句，作“好像，仿佛”解。如果從句中講的是非真實情況，則用虛擬語氣。eg：She loves the child as if though he were her own 她愛這個孩子如同愛自己的孩子。As if though 也可用來引導表語從句，常用在“ It appear s looks seems +as if though ”

15、句型結構中。 eg；It appears as if though it is going to clear up 看起來天要晴了。It seems as if though he knew nothing about it. 他好像對此事一無所知。5 as to 作 “關于，至于”解。eg；There is no doubt as to his honesty他的誠實是無可置疑的。6 as much many as作 “多達 ”， “達到 之多 ”解。eg：He can earn as much as 5000 dollars a month他每月能掙5000 美元。7 so as far

16、as I know 作 “就我所知”解，在句中作插入語。eg：As So far as I know， he will come here next Monday 據我所知，他將于下星期一到這里來。8 as a result， as a result of表示“由于 的結果”。 eg：She died as a direct result of the accident她的死是那次事故的直接結果。8， as well 為 “也，還 ”之意。eg：Come early， and bring your brother as well 早點來，把你的弟弟也帶來。9 so as to， so as t

17、o若跟動詞原形，表示目的或結果。eg：He studied hard so as to pass the exam他努力學習以便通過考試。（表示目的） as 用法小結1） as作副詞，表示程度，意為“同樣地 ”。在“ as as ”， “ not as as ”結構中的第一個as是副詞，作“和與 （不 ）一樣 ”解。eg：Jack is as tall as his father杰克和他的父親一樣高。He doesn't speak English as so fluently as you 他的英語說得不如你流利。2） as作介詞。1 作“如，像”解。 eg：They got uni

18、ted as one man 他們團結得像一個人一樣。2作“充當，作為”解。 eg：As a writer ， he was famous作為作家，他是很有名的。3） as作連詞，常用來連接主句和狀語從句。1 引導時間狀語從句，作“當 的時候”解，有 “隨著 ”之意，與while 意義相近，強調兩個動作同時發生；或某事一發生，另一事立即發生。eg：He shouted aloud as her ran along他一邊往前跑，一邊高聲地呼喊。I was startled as he opened the door他一開門，我嚇了一跳。as 作連詞，相當于when。 eg；As a little

19、 boy （When he was a little boy）he began to learn to play piano 他小時候就開始學彈鋼琴。2引導原因狀語從句，作“因為，由于”解，與 because的用法相近。eg；I must stop writing now ， as I have rather a lot of work to do 我必須停筆了，因為我還有許多工作要做。3引導方式狀語從句或比較狀語從句，作“正如，（如 ）像 ”解。例eg：As in your country ， we grow wheat in the north and rice in the south

20、正如 （像 ）你們國家一樣，我們在北方種小麥，在南方種大米。（方式狀語從句）When at Rome， do as Romans do入鄉隨俗。（方式狀語從句）4引導讓步狀語從句，作“雖然，盡管”解。這時從句常用倒裝語序，即把從句中的表語、狀語或動詞原形放在as 之前。 eg；Strange as it may seem， it is true盡管這事看上去很奇怪，但卻是真的。Try as he might ， Tom could not get out of the difficulties 不管怎樣努力，湯姆還是擺脫不了困境。4） as作關系代詞。1 引導限制性定語從句，用在“ such

21、as” , “ the sam eas”， “ as as”等結構中，常譯作 “像 一樣的人(或物 )”， “凡是 的人(或物)”。例eg：He wished to be such a man as Lei Feng was他曾希望做一個像雷鋒那樣的人。My hometown is no longer the same as it was 我的家鄉再也不像過去一樣了。2引導非限制性定語從句，用來指代它前面的整個句子(即先行句)，意思是“這一點 ”。這個分句可以位于句首、句中或句末。eg：As is well known ， oceans cover more than 70of the ear

22、th我們知道，海洋占地球面積的百分之七十以上。五)含as的固定詞組的用法2 as soon as作 “一 就 ”解，引導時間狀語從句。eg：As soon as I get to Beijing ， I'll write to you 我一到北京，就給你寫信。3 as so long as 作 “只要 ”解，eg；As So long as you study hard ， you'll make progress 只要你努力，你就會取得進步。4 as if though 常用來引導方式狀語從句，作“好像，仿佛”解。如果從句中講的是非真實情況，則用虛擬語氣。eg：She lov

23、es the child as if though he were her own 她愛這個孩子如同愛自己的孩子。As if though 也可用來引導表語從句，常用在“ It appear s looks seems +as if though ”句型結構中。eg；It appears as if though it is going to clear up 看起來天要晴了。It seems as if though he knew nothing about it. 他好像對此事一無所知。5 as to 作 “關于，至于”解。eg；There is no doubt as to his h

24、onesty他的誠實是無可置疑的。6 as much many as作 “多達 ”， “達到 之多 ”解。eg：He can earn as much as 5000 dollars a month他每月能掙5000 美元。7 so as far as I know 作 “就我所知”解，在句中作插入語。eg：As So far as I know， he will come here next Monday 據我所知，他將于下星期一到這里來。8 as a result， as a result of表示 “由于 的結果”。 eg：She died as a direct result of t

25、he accident她的死是那次事故的直接結果。8， as well 為 “也，還 ”之意。eg：Come early， and bring your brother as well 早點來，把你的弟弟也帶來。9 so as to， so as to若跟動詞原形，表示目的或結果。eg：He studied hard so as to pass the exam他努力學習以便通過考試。(表示目的)as.as的用法as.as意為"和 一樣"，表示同級的比較。使用時要注意第一個as為副詞，第二個as為連詞。其基本結構為：as+ adj./ adv. +as。例如：(1)This

26、 film is as interesting as that one. 這部電影和那部電影一樣有趣。(2)Your pen writes as smoothly as mine. 你的鋼筆書寫起來和我的一樣流暢。其否定式為not as/so +adj./ adv. +as。例如：This dictionary is not as/so useful as you think. 這本字典不如你想象的那樣有用。若有修飾成分，如twice, three times, half, a quarter 等，則須置于第一個as之前。例如：Your bag is twice as expensive as

27、 mine. 你的袋子比我的貴一倍。幾個關于as.as的常見句型：(1) as.as possiblePlease answer my question as soon as possible.請盡快回答我的問題。(2) as.as usual/beforeShe looks as pretty as before.她看起來和以前一樣漂亮。(3) as long as. (引導條件狀語從句)It took us as long as three years to carry out the plan. 我們花了長達三年的時間才完成這項計劃。(4) as far asHe walked as f

28、ar as the railway station yesterday evening. 昨天傍晚，他一直散步到火車站。(5) as well asShe cooks as well as her mother does.她燒菜燒得跟她母親一樣好。一些帶有as.as結構的常見短語歸納：as busy as a bee像蜜蜂一樣忙碌as easy as ABC 像 ABC 一樣容易as deep as a well 像井一樣深as light as a feather 像羽毛一樣輕as soft as butter 像黃油一樣軟as rich as a Jew像猶太人一樣富裕 解題過程as +

29、形容詞或副詞原級+ as1 )在否定句或疑問句中可用so as。He cannot run so/as fast as you.2)當asas 中間有名詞時采用以下格式。as +形容詞+ a +單數名詞as + many/much + 名詞This is as good an example as the other is.I can carry as much paper as you can.3)用表示倍數的詞或其他程度副詞做修飾語時，放在as的前面。This room is twice as big as that one.Your room is the same size as mi

30、ne.4) 倍數 + as + adj. + as <=> 倍數 + then + ofThis bridge is three times as long as that one.This bridge is three times the length of that one.Your room is twice as large as mine.Your room is twice the size of mine.necessary+for 還是 to?一般情況下是+ to, 若是表示“對某人有必要的、是必須的”之意，即 necessary 后面直接跟人稱代詞，就+ for

31、 。看一些例句就知道了：1) ) Sleep is necessary to health.睡眠對健康是必要的。2) Sometimes it is not necessary to go inside in order to buy the hamburgers.有時候要買漢堡包不需要進入這些餐館。3) It is necessary for older people to understand what they think and feel.年長的人有必要了解年青人在想些什么, 他們有什么感覺。“ It s +adj.+of+sb.+to do ”和 “ It s+adj.+for+sb

32、.+to do ”區別It is+adj.+of sb. +to do sth中的 adj. 跟 sb. 有關 ,這個 adj. 是用來形容sb. 的 ,表示某人這么做真是太adj. 了你會發現在這個句型中你把sb. 和 adj. 提出來可以造個句sb. is(are) adj.如 It's very kind of you to help me.把里面的sb. 和 adj. 提出來可以發現you are kind 是說得通的.而 It is +adj.+for sb.+to do sth表示做某事對某人來說很adj.這里的adj. 是 do sth. 的屬性里面的sb. 跟 adj.

33、 沒有直接聯系如 It's difficult for you to deal with the problem.你就不能說you are difficultIt's adj of sb to do sthIt's adj for sb to do sth用 of 常用于描述人的性質用 for 常用于描述事情的性質了吧中 adj 是針對事件，修飾sb中 adj 是針對 sb，修飾事件友好、可恨、善良等。容易、重要、關鍵 例如： It ” s very nice （kind, friendly） of you to help me carry the baggage. 你

34、真友好，幫我搬了行李。It ” s very important for you to solve the problems. 解答出那些難題對于你來說非常主要。by 的意思（例句）prep. preposition 介詞1. 被 ,由The homework was assigned by the teacher. 這些家庭作業是老師布置的。2. 靠 , 用 , 通過They crossed the river by ferry.他們乘渡船過了河。3. 經由 ; 沿Ellen flew to Chicago by way of Minneapolis.艾倫經由明尼阿波利斯飛往芝加哥。4. 在

35、 . 旁邊 , 靠近 ; 在 . 手邊I haven't got any money by me.我身邊沒有帶錢。5. 不遲于 ; 在 . 之前We had to get there by evening.我們必須在夜晚前抵達那里。6. 根據 , 按照How do you know he didn't act by the rules?你怎么知道他沒有按規定行事?7. （ 表程度 ） 相差He missed the bus by three minutes.他晚了三分鐘沒趕上那班公車。8. 憑 , 對 .（ 發誓 ）I swear by God!我對上帝發誓!9. （ 乘除法上

36、） 以 ., 用 .（ 乘或除 ）Nine divided by three makes three.九除以三得三。10. 以 . 計 , 按You'll be paid by the hour.你的工資將按時計酬。11. 在 . 的時候He had to sleep by day and work by night.他只好白天睡覺, 晚上工作。12. 就 . 來說 , 關于Philip is a doctor by profession.菲利浦的職業是醫生。13. （ 表連續或反復） 逐個 ; 逐批The teacher explained the text sentence by

37、sentence.教師逐句講解了這篇課文。14. 由于She took my umbrella by mistake.她誤拿了我的傘。adv. adverb 副詞1. 經過 ; 過去A truck went by.一輛卡車開過。2. 在旁邊When I filled out the form she was standing by all the time.我填寫表格時, 她一直站在我身旁。3. （ 放 ） 在一邊They put money by for later use.他們儲存錢以備將來使用。4. 【美國 口語】到（ 或進入 ） 某人的家Please come by and have

38、dinner with us.請到我家來一起吃晚飯。些詞組：day by day little by littleone by one piece by pieceside by side step by stepby day （night） by handby letter by mistakeby plane by postcome by bicycle go by airgo by boat go by trainknow by name know by sightsend .by wireless send . by electricity（all） by oneself by the

39、 wayby chance by means ofby no means by this meansby way of by and byby and large close bypass byas well 與 as well as 的用法區別as well 與 as well as 的用法區別as well 與 as well as 只有一詞之差，但意義和用法卻相差甚遠。1、 as well 用法：1、 、 as well 常用作狀語，作“又；也”解，相當于 too 或 also ，常位于句末，無須用逗號與句子分開。如：I am going to London and my sister

40、is going as well（ going ， too ） .我要到倫敦去，我妹妹也要去。I not only play the guitar ， I sing as well （ I also sing ） .我不但彈吉他，而且還演唱。2、 as well 在口語中也可用于句中，作“也好，也行”或“倒不如”解，用來緩和語氣。如：You may as well go 、你去也好。The weather was so bad that we might （ just ） as well have stayed at home.天氣太壞了，早知道如此，倒不如呆在家里為好。3、 as well

41、可以直接用于just 后，用作應答語（可視為It's just as well 、的省略），作“幸虧，幸而；無妨；沒關系”解。如： We were too late to see the film.我們去得太晚了，沒有看上電影。 Just as well 、 I hear it isn't very good.不必遺憾，我聽說電影也不怎么樣。2、 as well as 用法1 、 as well as 常用來連接兩個并列的成分，作“也，還”解。它強調的是前一項，后一項只是順便提及。因此連接并列主語時，謂語動詞與前一項一致；而用not only .but also.連接時，謂語動

42、詞與后一項一致。如：Your wife as well as you is friendly to me.不僅你而且你的妻子也對我很友好。（ Not only you but also your wife is friendly to me、）Electric energy can be changed into light energy as well as into sound energy.電能既可以被轉變成聲能，又可以被轉變成光能。2 、 as well as 用來表示同級比較，指“一樣好”。如：You look as well as you did ten years ago.你的身

43、體看起來還和十年前一樣好。He plays the guitar as well as you.他的吉他彈得和你一樣好。 驗收臺：上面講了as well 與 as well as 的用法，你是否掌握了？一起來做一下下面的單項填空題。1、 、 They play all kinds of instruments and sing .A、 also B 、 either C 、 as well D 、 as well as2、 Tom， Jane and Rose ， going to the farm on foot.A、 as long as ； is B 、 as well as ； are

44、C、 as long as ； are D 、 as well as ； is3、 They travel at full speed by day .A、 and night B 、 and by night as well asC、 as well at night D 、 as well as by night4、 Mrs Black writes ， if not better than ， her husband.A、 as well as B 、 so wellC、 so well as D 、 as well5、 We expect her to do the housework

45、 as well after the children.A、 as look B 、 as looking C 、 and look D 、 looking6、 She doesn't speak her friend ， but her written work is excellent.A、 as well as B 、 as often as C 、 so much D 、 as good as7、 Which of the following sentences is right？A、 Both father and as well as mother love me.B、 F

46、ather as well as mother loves me.C、 Both father as well as mother loves me.D、 Not only father but also mother love me.8、 You feel you did yesterday ， don't you ？A、as good as B、 as well C、so good D 、as well as9、 I'm sure I was right 、 It is just I didn't lend him the money.A、so well B 、as

47、 well as C、as well D 、the same asKey: 1 5 C D D A A 6 9 A B D C四級語法備戰-as 的用法大全as可以作連詞、介詞及關系代詞。現將其用法小結如下:1、 as作連詞的用法:1. 作 "當 的時候 ", 引導時間狀語從句。注意與when、while 的用法區別 when 作 "當 的時候"解 ,可以指較短的（一點）時間 ,也可指一段時間。如:When he was at college, he could speak several foreign languages.When the clock

48、 struck twelve, all the lights in the street went out. while 常表示一段較長的時間或一個過程,強調主句謂語動詞與從句謂語動詞同時發生。如Work while you work. Play while you play. 但屬下列情形時,只用as, 而不用 when 或 while 。A） 用于表示同一個人的兩種動作交替進行,指 "一邊, 一邊 " 。如 :The girl dances as she sings on the stage.He looked behind from time to time as he went forward.B）表示兩個同步發展的動作或行為,譯為"隨著 " 。如 :As time went on / by, she became more and more worriedAs children get olde