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1、As 用法小结,as,conj.,adv.,pron.,prep.,固定用法,引导定语从句,引导时间状语从句,引导原因状语从句,引导让步状语从句,引导方式状语从句,引导比较状语从句,As作副词,“相同地”，“同样地”。 They dont have as many airplanes. 他们没有同样多的飞机。 As before he remained unmoved. 他和以往一样无动于衷. He is as tall as my sister.,时间状语从句,AS作为连词,原因状语从句,比较状语从句,让步状语从句,方式状语从句,.,1. Strong as he is, he is afr
2、aid of pain. 2. Slowly as the tortoise walks, it can beat the rabbit. 3. Doctor as she is, she cant cure her own disease. 4. Try（hard） as he does（will）, he never seems able to do the work beautifully.,adj./adv+as+ S+be/v.,n. + as +S+ be (句首名词不带冠词),v. +as +S+ do/does/did,句首是实义动词，其他助动词放在主语后。如实义动词有宾语和状
3、语，随实一起放在主语之前。,引导让步状语从句（倒装）,_dull he may be, he is certainly a very successful top executive. A. Although B. Whatever C. As D. However,D,Much as I would have liked to, I couldnt lend him the money because I simply didnt have that much spare cash. (1999. 62),Fool _Jane is, she could not have done such
4、 a thing. A. who B. as C. that D. like,。,.,1、I read the letter as I walked along the river. 2. As the wealth of the country increases, more waste will be produced. 3. As I was going out the telephone rang. 4. Mother was worried because little Alice was ill, especially as father was away.,(一边一边),(随着)
5、,(正要干突然：同时发生),(当时候),引导时间状语从句,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。,.,.,when/while/as 1. She can write only when the baby is asleep. 2. My pen dropped on the ground when I was walking in the park. 3.
6、 I was drawing when he came in. 4. We must strike while the iron is hot. 5. While we were talking, the teacher came in. 6. As I looked, someone came near. 7. As I get older I get more optimistic.,引导时间状语从句,.,As the weather was fine, we decided to walked to the restaurant. 2. She lied to us because sh
7、e had to do in order to get a job.,辨析：一般来说，as表示听者已知的原因，因而常位于句首，而because表示听者未知的原因，因而常位于句尾，成为信息的焦点。因此，as不能回答why的问题，也不能在强调句型中作为被强调的成分。,引导原因状语从句,.,When at Rome, do as Romans do. 2. I cant change it like I used to. 3. Please try to write as I do/like me.,辨析：做“如”“像”“按照”解的as可用作连词，其后可引出方式状语，在正式英语里like只能做介词不
8、能做连词。当as和like都做介词时，词义不同，as表示“作为”以资格“”，like则表示“像”“与相似”,引导方式状语从句,as 引导方式状语从句,as, (just) asso “如，正如一样”。just as 比as 语气要强一些。 Leave things as they are. 让一切顺其自然 As water is to fish, so air is to man. 我们离不开空气，犹如鱼儿离不开水。 正如水对鱼一样重要，空气对于人同样重要。,Water is to fish what air is to man.,引导比较状语从句,用于“as.as.或not so/ as.a
9、s.”中,前一个as是副词,后一个as是连词， “如(不如)一样”。 I am as tall as my mother (is tall). I dont 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， At your age you cant expect to play football as well as me (= as I do).,.,asas表示倍数的句型 1. Tom is as tall as I. 2. Jack is not as/so clever as his sister.
10、3. This pencil is half(a quarter) as long as that one. 4. Sound travels nearly five times as fast in water as in air.,A is n times as much (large, great, fast, many ) as B A是B的几倍,as much A as B,Teaching is as much an art as a science. He can earn as much as 5000 dollars a month,多达,not so much A as B
11、,Success lies not so much as in luck as in hard work.,As 作介词，,1. 表示 “好像(某人)” 2. 表示“作为，当作”， 3. 表示“当某人是(某身份)时。 4. 表示“因某人是(某身份)”，,They entered the building disguised as cleaners. 他们化装成清洁工人的模样进入大楼。 I found a job as a teacher. 我找了一份教师的工作 As a child, she was sent to three different countries. 她儿时去过三个不同的国家
12、。 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。,表示“因某人是(某身份)”,表示“当某人是(某身份)时。,表示“作为，当作”，,表示 “好像(某人)”,试比较,He spoke as a teacher. He spoke like a teacher.,as “以实际的身份或地位”。 他作为老师发言./他以老师的身份发言. like “与相似，以与相类似的方式”。 他讲话很像是老师”。,AS 作为关系代词,A. as引导定语从句用于以下结构 a) the same
13、.as This is the same book as I read last week. b) such.as I dont like such books as he recommends. c) “so +adj. + a/an + n. (单数) + as “ I am not so strong a man as I was.,B. 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。 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) To shut your eyes to f
14、acts, 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) He seems to be a foreigner, as in fact he is. (先行词是名词),.,.,1. As you know, Ive decided to leave at the end of the month. This is also part of your work, as I told you before. 3. Taiwan is, as you know, an inseparable part of China
15、.,as everybody knows, as you may remember, as you say, as I can see, as I have said, as you may have heard 一些固定词组,.,.,as it is/as it is 1、As it is, things are getting better and better. 2. Leave it as it is. 3. I like the house better as it is. 4. State the facts as they are.,用在句首的as it is(was)前面一般要
16、有一个与事实相反的情节，而用as it is(was)来陈述真实的情况，通常译为“事实上” “实际上” “实际情况是”。 句末则表示“按原来的样子” “照现在的样子”，常放在名词或代词的后面， it替代前面的单数名词，是复数则有用as they are。,（事实上）,（别动它，保持原来的样子）,（现在的样子）,（实事求是地把事实摆出来。）,as固定词组,1.as/so far as 2.as long as/as long as 3.as much/many as+数量词 4.as much as/as high as (反义词as little as) 5. as tall as 6.as
17、well /as well as 7. as for/as to 8. as if/as though 9. as yet,在范围内，到程度；一直到；像那么远,只要；与一样远,也，又；与一样好,言其多,与一样高,至少；关于,好像，似乎,到目前为止,as regards as a rule as a whole as far as I know/can see,至于某事物；提到某事物,通常；一般说来,总体上,就我所知/依我看,think of as treatas look on/upon.as consideras be well-known as refer toas work as act
18、 as,As的用法练习,Translate the following sentences: 1. Tom runs fast, but I run just as fast. 2. She doesnt sing so well as her sister. 3. I have changed it as you suggested. 4. We all like her as she is very kind. 5. He raised his voice so as to be heard. 6. Tired as they were, they walked on. 7. I neve
19、r heard such stories as he told. 8. He is careful, as his work shows. 9. He works as a teacher. 10. As you sow, so will you reap.,Tom is as tall as Jim. My handwriting is not as /so good as yours. To make much progress like him we must study as hard. As he was tired, he went to bed early. The studen
20、ts did as their teacher told them. She stood at the door as if she were waiting for someone. As for me, I have nothing to complain of. I remember the whole thing, as if it happened yesterday.,This pencil is half as long as that one. He is twice as old as I. I read the letter as I walked along the ri
21、ver. He talked to me like my father. My hometown is not the same as it was. As he wasnt reading in time, we went without him. As far as Im concerned, you can do whatever you like. Theres no special rules as regards what clothes you should wear.,every other member of the team, he wore an official uni
22、form in the victory parade. He works engineer. A. Like B. as C. the same as D. as an,A,D,is generally accepted, economical growth is determined by the smooth development of production. A. What B. that C. it D. As,D,can be seen from the comparison of these figures, the principle involves the active p
23、articipation of the patient in the modification of his condition. A. As B. what C. that D. it,A,is known to the world, Mark Twain is a great American writer. A. That B. which C. as D. it,C,As announced in todays papers, the Shanghai Export Commodities Fair is also open on Sundays. A. Being B. is C.
24、to be D. been,B,might be expected, the response to the question was very mixed. A. As B. that C. it D. what,A,Most electronic devices of this kind, manufactured for such purpose, are tightly packed. That are B. as are C. which is D. it is,B,The size of the audience, we had expected, was well over on
25、e thousand. A. Whom B. who C. as D. that,C,Tired he was, we decided not to disturb him. A. when B. although C. as D. like,C,Diligent he was, he failed in the English final exam. A. Though B. although C. as D. like,Although he was diligent, he failed in the English final exam.,C,As 引导的原因状语从句和让步状语从句都可 一产生倒装语序, 而though只能引导让步状语从句, he does get irritated with her sometimes. As he likes her much Much although he likes her Though much he likes her Much as he likes her,D,The house was very quiet, as it was on the side of a mountain. Being isolated B. isolated C. Isolating D. having been isolated,B,