1、As 的用法歸納as 的用法很多，又比較復雜，本文就此作一歸納：一、作副詞，意為“相同地” ，“同樣地”。例如：They donthave as many airplanes.他們沒有同樣多的飛機。二、作連詞，1. 引導時間狀語從句as 與 when，while 都是引導時間狀語從句的從屬連詞，含義都是 "當的時候 " 。但它們有區(qū)別 :(1). when 作“當 的時候”解，可以指較短的 (一點 )時間 ,也可指一段時間。從句的動作可以與主句的動作同時發(fā)生，也可以先于主句的動作發(fā)生。例如 :John was having his dinner when I saw him

2、. 當我看到約翰的時候，他正在吃飯。She can write only when the baby is asleep只.有嬰兒睡著的時候， 她才能寫作。(2). 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(fā)生或在從句動作過程中發(fā)生。例如 :We must strike while the iron is hot.要趁熱打鐵。While we were reading, the teacher came in. 我們正在讀書的時候，老師走了進來。(3). 但屬下列情形時，只用as, 而不用 when 或 while。 用于表示同一個人的兩種動作交替進行 ,

3、指“一邊 ,一邊 ”。例如 : The girl dances as she sings on the stage那個.女孩在舞臺邊唱歌邊跳舞。He looked behind from time to time as he went forward當.他朝前走時，不時地向后看。 表示兩個同步發(fā)展的動作或行為,譯為“隨著 ”。例如 :As time went on / by, she became more and more worried隨. 著 時 間 的 流逝，她變得越來越焦慮。As he grew older, he became more intelligent隨.著他年齡的增長，

4、他變得更有才智了。 表示兩個短促行為或事件幾乎同時發(fā)生。例如:I thought of it just as you opened your mouth恰.好在你開口時，我想到了它。Just as the flying worm hit her face, she gave a loud cry恰.巧在飛蟲撞到她臉上時，她大哭起來。2. 引導原因狀語從句as，because，since都可以表示因果關系，連接原因狀語從句，含義是“因為，由于”，但它們有區(qū)別： because表示的語氣最強； as 一般放在句首，語氣較弱，較口語化； since 常常用在書面語中，表示多為對方已知的、或稍加分析便

5、可得知的原因，有時可譯作“既然” 。例如：I do it because I like it. 我做這件事是因為我喜歡。Since many of the customerswork during the day, Billy has to collect themoney at night. 因為許多顧客白天上班 ,所以畢利只好晚上去收錢。As she has been ill perhaps she'll need some help她.由于生病可能需要些幫助。3. 引導讓步狀語從句as 與 although (或 though)，however (或 no matter how)

6、等都可以引導讓步狀語從句，含義是“雖然，盡管” ，但它們有區(qū)別： although語氣稍正式些，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 所表示的語氣較強，引導的讓步狀語從句用倒裝語序； however引導讓步狀語從句時，它的后面可跟形容詞或副詞，也要用倒裝語序。例如：Although they are poor they are happy.雖然他們很窮，但很快樂。Angry as he was, he managed to speak calmly.雖然他很生氣，但是他講話很平靜。However hard the question is, he can a

7、nswer it. 不管問題有多難他都能回答。注意：當 as 引導讓步狀語從句時，句子的倒裝語序有以下三種形式：(1). 形容詞或副詞 +as+主語 +連系動詞 be 或實義動詞。例如：Rich as he is, he never spends a cent on clothes雖.然他很富有，但他從不花一分錢在衣服上。Much as I admire his courage, I dontthink he acted wisely. 我雖然佩服他的勇氣，但我認為他這樣做是不聰明的。(2). 名詞 +as+主語 +連系動詞 be (注意句首的名詞不帶冠詞)。例如：Child as he is

8、, he knows a lot.盡管他是個孩子，但懂很多事情。Boy as he was, he was chosen king盡.管他還是個孩子，但卻被立為國王。(3). 實義動詞 +as+主語 +助動詞 如果沒有助動詞，則要加上一個do(does或did)。例如：Try as he may, he never succeeds盡.管他很努力，但總是不成功。Change your mind as you will, you will gain no additional support. 即使你改變主意，你也不會得到另外的支持。4. 引導方式狀語從句，意為“如” ，“像”，“按照 的方式”

9、。如 :I want you to tell my friend your very interesting experience exactly as you have told it to me. 我想讓你像給我講述的那樣，給我的朋友講一講你那段極其有趣的經歷。Remember, you must do everything as I do記.住，你必須按照我做的那樣做一切。注意： like 在非正式語體中可以有與as 相同的用法。如：I cantsing like I used to我.不能像以前那樣唱歌了。He writes just like his brother did when

10、 he was young他.現(xiàn)在寫文章正像他哥哥年輕時寫文章一樣。5. 引導比較狀語從句 ,用于“ as.as.或 not so/ as.as.”中,前一個 as是副詞 ,后一個 as 是連詞，意為“如 (不如 )一樣”。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：句中連詞 as 后面的代詞實際是省略了與主句相同的部分，即例（ 1）可以寫成 You hate her as much as I hate her. 如果很明顯

11、就能看出所省略的部分，意義不會含糊不清時，在口語中也可以用代詞的賓格形式。例： At your ageyou cantexpect to play football as well as me (= as I do)但.例（ 1）就不能改 I 為me，改后意思就變?yōu)椋?You hate her as much as you hate me你.恨她像恨我一樣深；而原句的意思為：你恨她像我恨她一樣深。三、作代詞as 作關系代詞的用法關系代詞 as 引導定語從句時，既可以單獨使用，也可以與其他詞連用，其用法要比 that 和 which 更為復雜。1. as 引導定語從句與其他詞連用(1). 用于

12、the same.as結構中This is the same watch as I have lost這.塊手表跟我丟失的那塊一樣。(2). 用于 such.as結構中I don tlike such novels as you recommend我.不喜歡你推薦的那些小說。(3). 用于 "so +adj. + a/an + n. (單數 ) + as "結構中I am not so strong a man as I was.我已經沒有從前那么強壯了。2. as 單獨引導定語從句as 單獨引導定語從句時，先行詞可以是一個詞，也可以是一個句子或短語。例如：(1) She

13、is late, as is often the case.她遲到了，這是經常的事。 (先行詞是整個主句 )(2) To shut your eyes to facts, as many of you do, is foolish對.事實視而不見-你們好多人都是如此的愚蠢。 (先行詞是不定式短語 )注意 1：(1). 當 as 引導的定語從句位于具有否定意義的主句之前時，as 從句所修飾的范圍是整個主句的內容，也就是說，把否定意義也包括在內。例如：As has been said above, grammar is not a set of dead rules正.如前面所說，語法不是一套死條

14、文。(2). 當 as 引導的定語從句位于具有否定意義的主句之后時， as從句所修飾的范圍不包括否定意義。例如：Spiders are not insects, as many people think. = Spiders are not insects. But many people think they are. 許多人認為蜘蛛是昆蟲，但蜘蛛并不是昆蟲。(3). 當 as 引導的定語從句位于具有否定意義的主句中間時， as從句所修飾的范圍也不包括否定意義。例如：She did not, as her friend had feared, open the case她.沒有打開盒子，而她

15、的朋友就是怕她當面打開盒子。注意 2: 當修飾句子的非限制性定語從句位于句尾時， as可以用 which 來替代。例如：I live a long way from work, as (which) you know.我住得離工作單位很遠，這你是知道的。但是，當 as 從句位于句首或句中是，as 就不能用 which 來替代了。例如：As you will find out, I will never let you down. 你將會發(fā)現(xiàn)，我絕不會使你失望的。Taiwan is, as you know, an inseparable part of China.你們知道，臺灣是中國不可分割

16、的一部分。此外，如果主句為否定句，則位于句末和句中的 as 從句所修飾的范圍并不包括主句的否定意義，此時， as 也不能用 while 來替代。例如：Greenland was not a continent, as people thought. 格陵蘭并不像人們所想象的那樣是一個大陸。四、作介詞，1. 表示 “好像 (某人 )”，例如 :They entered the building disguised as cleaners.他們化裝成清潔工人的模樣進入大樓。2. 表示“作為，當作” ，例如：3. 表示“當某人是 (某身份 )時。例如：As a child, she was sent

17、 to three different countries. 她兒時去過三個不同的國家。4. 表示“因某人是 (某身份 )”，例如：As her private secretary he has access to all her correspondence他.是她的私人秘書，能接觸到她所有的信件。注意 1： 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。例如 :As a Party member, I'll take the lead in everything. 狀(語 )She works as a nurse.狀(

18、語 )Tom has me as one of his best friends引.(起賓語補足語 )注意 2：as 和 like 都可以作介詞，但意義不同。 as 表示“以實際的身份或地位”。like 則表示“與 相似，以與 相類似的方式”。例如：(1). He spoke as a teacher.(2). He spoke like a teacher.句(1)的意思是：“他作為老師發(fā)言”或“他以老師的身份發(fā)言” 。句 (2)的意思是：“他講話很像是老師” 。五、用于一些固定搭配1. as good as差不多，幾乎Dontworry, the matters as good as se

19、ttled別.擔心，問題差不多已經解決了。When the car was repaired, it looked as good as new這.輛汽車修理好的時候，看起來差不多就像新的一樣。2. as if as though似乎；好像He behaved as if nothing had happened他.裝著若無其事的樣子。She treats him as though he was her own son.她待他好像待自己的兒子一樣。另外， as if 可以接一個動詞不定式短語。例如：He waved his hand to me as if to have something

20、 to tell me.他向我揮手好像有什么要告訴我。3. as well as同（一樣也）；和；還Joan can speak Chinese as well as English瓊.能講英語還能講漢語。He spent all his money, as well as wasting his time他.不僅浪費了時間，還花光了他所有的錢。4. such as, such as像 這樣的I bought a lot of fruits, such as apples, oranges, bananas and so on我. 買 了許多種水果，像蘋果，桔子，香蕉等。We had such

21、 books as you never saw我.們有一些你從未看過的書。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. 在鄉(xiāng)下我們度過了一個愉快的周末。 至于交通，我們沒遇到任何困難。6. as to關于某事物；提到某事物I don't know anything as to the others.至于其他，我一無所知。7. so as to 以便 , 為了Students should take notes so as t

22、o make revision easier學生.應當記筆記，以便容易復習。8. as a matter of fact其實；實際上As a matter of fact, I mvery fond of housework. 其實，我很喜歡做家務。9. as a result結果 (發(fā)生某種情況 )As a result， he had been given an excellent job結.果，他得到了一份極好的工作。10. as long as只要You may borrow this book as long as you promise to give it back只.要你答應歸

23、還，你就可以把這書借走。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，應付自如。鞏固練習1. She had a tense expression on her face, _she were expectingtrouble.A. even though B. even as C. as though D. now that2. A good many proposals were raised by the delegates, _was to be expected.A. that B. what C. so D. as3. _

24、might be expected, the response to the question was very mixed.A. As B. That C. It D. What4. Americans eat _as they actually need every day.A. twice as much protein B. twice protein as muchC. twice protein as much D. protein as twice much5. The trumpet player was certainly loud. But I wasn't bot

25、hered by his loudness _by his lack of talent.A. than B. more than C. as D. so much as6. 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 as7. _he works hard,

26、 I don't mind when he finishes the experiment.A. As soon as B. So far as C. As well as D. As long as8. _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 asKey: 1-5 CDAAD 6-8 D

27、DD高考真題直練1. It is generally believed that teaching is _it is a science.A. an art much asB. much an art asC. as an art much asD. as much an art as2. 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 as3. The piano in the other s

28、hop will be _, but _.A. cheaper; not as better B. more cheap; not as better C. cheaper; not as good D. more cheap; not as good4. 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 as5. With th

29、e help of the German experts, the factory produced _ cars in 1993 as the year before.A. as twice manyB. as many as twiceC. as twice as manyD. twice as many6. 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 as7. _, he doesn'