20130422 AS用法.ppt

1、1,As的用法, As作副词 表示程度，意为“同样地”。在“asas” “not asas”结构中的第一个as是副词，作“和/与(不)一样”解。 Jack is as tall as his father. He doesnt speak English as/so fluently as you.,2,As的用法, As作介词 1. 作 “如，像”解。 They got united as one man. She spoke of me as her closed friend. 2. 作“充当，作为”解。 As a writer, he was famous. English is sp

2、oken as the first language by most people in Australia.,3,As的用法, As作连词 1. 引导时间状语从句。与while意义相近，强调两个动作同时发生；或某事一发生，另一事立刻发生。作“一边一边，随着”解。 He shouted aloud as he ran along. I was frightened as he opened the door. We get wiser as we get older.,4,As的用法, As作连词 2. 引导原因状语从句，与because的用法相近，但语气很弱，一般指显而易见的原因。 As i

3、t was getting very late, we soon turned back. We must stop writing now, as I have rather a lot of work to do.,5,As的用法, As作连词 3. 引导方式状语从句，作“按照，像” 解。 When at Rome, do as Romans do. We do farm work as the old peasant teaches us. As (it is) in your country, we grow wheat in the north and rice in the sou

4、th. 像你们国家一样,6,As的用法, As作连词 4. 引导让步状语从句；作“虽然，尽管”解。这时从句常用倒状语序，即把从句中的表语，状语或动词原形放在as之前。(as倒装，though可不倒) Child as she is, she knows a lot. Though she is a child, she knows a lot. Busy as he is, he insists on studying. Though he is busy, he Try as he might, Tom could not get out of the difficulties. Thoug

5、h he might try, Tom could not get out of the difficulties.,7,As的用法, As作关系代词 1.引导限制性定语从句，用在“such as”, “the same as” “so/asas”等结构中 He wished to be such a man as Lei Feng was. He is not the same man as he used to be.,8,As的用法, As作关系代词 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，这种情况，正如”。这个分句可以放在句首，句中，或句末。

6、As anybody can see, this elephant is like a snake. The compass was invented in China, as we know now. He, as we expected, completed his task with great success.,9,语法重点练习：,Careful surveys have indicated(表明) that as many as 50 percent of patients do not take drugs _ directed. A) like B) so C) which D)

7、 as,答案为【D】 译文 细致的调查表明，50%的病人不按规定吃药。 as作连词，引导方式状语从句。,10,语法重点练习：,_ might be expected, the response to the question was very mixed. A) As B) That C) It D) What,答案为【A】 译文 可能正像估计的那样，对这个问题的反应非常混乱。 as作关系代词，引导非限制性定语从句。,11,语法重点练习：,As _ announced in todays papers, the Shanghai Export Commodities Fair is also

8、open on Sunday. A) being B) is C) to be D) been,答案为【B】 译文 正如今天报纸上宣布的，上海出口商品交易会也于周日开幕。解析 本题属于非限制性定语从句置于句首，关系代词用as结构。因为是在从句中， A、C、D选项均为非谓语形式，只有B是谓语动词，所以选B。,12,语法重点练习：,The British are not so familiar with different cultures and other ways of doing things, _ is often the case in other countries. A) as B

9、) what C) so D) that,答案为【A】 译文 英国人对不同文化和不同的做事方式不太熟悉，这种情况在其它国家也存在。,13,语法重点练习：,_ is often the case in other countries is that the British are not so familiar with different cultures and other ways of doing things. A) As B) What C) So D) That,答案为【B】 译文 英国人对不同文化和不同的做事方式不太熟悉，这种情况在其它国家也存在。,14,语法重点练习,_, he does get annoyed with her sometimes. A) Although much he li