聚焦高考題透視as考點(diǎn)PPT課件

1、as引導(dǎo)非限制性定語從句時(shí)，指代逗號前的整個(gè)句子（即先行詞），常翻譯為“正如，正像”，可置于句首或句末。（注：which只能放在句中）。eg. _is reported in the newspaper, talks between the two countries are making progress. (北京卷) A. It B. As C. That D. What解析： B。 as it reported意思是“正如所報(bào)道的”。What 只能引導(dǎo)名詞性從句。That 只能引導(dǎo)非限制性定語從句。如果用It,句子應(yīng)該是：It is reported in the newspaper t

2、hat talks between the two countries are making progress. 一. as做關(guān)系代詞，引導(dǎo)非限制性定語從句第1頁/共24頁as引導(dǎo)非限定性關(guān)系從句, 對前述內(nèi)容作補(bǔ)充，意為“正如，本情況, 該事實(shí)“等，位置主句前后均可。eg. 1.She has married again, as was expected. 她已再婚,這是意料中的事。 2.As anyone can see, We are tired. 我們累了,這是有目共睹的。as引導(dǎo)非限制性定語從句 小結(jié)第2頁/共24頁在as做關(guān)系代詞，引導(dǎo)限制性定語從句這一用法中，關(guān)系代詞常出現(xiàn)在th

3、e same as, such as, soas, asas, 等結(jié)構(gòu)中。eg. His plan was such a good one _ we all agreed to accept it. (陜西卷) A. as B. that C. so D. and解析： B。盡管句中有such,但從句中accept后面有賓語,所以這是suchthat引導(dǎo)的結(jié)果狀語從句，意為“如此以至于”。用as需要把句子改寫成：His plan was such a good one as we all agreed to accept. “as”引導(dǎo)定語從句在從句中充當(dāng)成分。二.as做關(guān)系代詞，引導(dǎo)限制性定

4、語從句第3頁/共24頁as與such, the same, as等連用, 引導(dǎo)限定性關(guān)系從句,意為“與相同的事物(或人)”，修飾先行詞，而且在從句中要充當(dāng)成分。1.It is such an easy book as he can read. 這是一本他能讀的容易懂的書。2.I received the same grade as you did. 我跟你得到同樣的分?jǐn)?shù)。as引導(dǎo)限制性定語從句 小結(jié)第4頁/共24頁as 引導(dǎo)讓步狀語從句，意為“盡管”。句子必須用倒裝結(jié)構(gòu)。eg. _ ，he talks a lot about his favorite singers after class.

5、(重慶卷) A. Quiet a student as he may be B. Quiet student as he may be C. Be a quiet student as he may be D. Quiet as he may be a student解析： B .若表語是單數(shù)名詞,則該名詞不用冠詞修飾。三. as 引導(dǎo)讓步狀語從句第5頁/共24頁as引導(dǎo)倒裝結(jié)構(gòu),表示讓步關(guān)系,其結(jié)構(gòu)為：“as+主語+謂語+”使用此結(jié)構(gòu)時(shí)應(yīng)注意以下幾點(diǎn):1)倒裝的部分一般為表語、狀語和動(dòng)詞原形。2)表語是單數(shù)可數(shù)名詞,其前面的a (an)要省去; 3)倒裝的動(dòng)詞原形常與may, might,

6、will, would等詞連用,但這些詞都要保留在原來位置上。1.Child as he is, he speaks English well. 他雖是個(gè)孩子,但英語說得很好。2.Much as I like the book, but I have no money to buy it. 雖然我非常喜歡這本書,但我卻沒錢買。3.Try as he might, Tom could not find a job. 不管怎樣努力,湯姆還是找不到一份工作。as 引導(dǎo)讓步狀語從句 小結(jié)第6頁/共24頁as 引導(dǎo)比較狀語從句時(shí)（asas/not asas/not soas）。eg. John is t

7、he tallest boy in the class, _according to himself. (安徽卷) A. five foot eight as tall as B. as tall as five foot eight C. as five foot eight as D. as tall five foot eight as解析：A。用as+形容詞+as+基數(shù)詞+單位。表示“高達(dá)-”，再如：This man is as tall as eight feet. 四.as 引導(dǎo)比較狀語從句第7頁/共24頁“as + 形容詞或副詞原級 + as” 意為“和一樣”，表示同級的比較，但

8、要注意第一個(gè)as為副詞，第二個(gè)as為連詞。根據(jù)比較對象和性質(zhì)的不同又可以把此種結(jié)構(gòu)分為三種：一.“asas結(jié)構(gòu)”用于表示不同人或物同一性質(zhì)的比較，意為“和一樣”。eg. The tree is as tall as the building (is) 這棵樹和那棟樓一樣高。 二.“asas結(jié)構(gòu)”用于表示同一個(gè)人或物不同性質(zhì)的比較，意為 “既又” 。eg. This swimming pool is as wide as it is long. 這個(gè)游泳池寬度和長度相等as 引導(dǎo)比較狀語從句 小結(jié) 第8頁/共24頁三. “as + 形容詞或副詞原級 + as”結(jié)構(gòu)的變體形式是“as +形容詞+

9、a +單數(shù)名詞+ as 或 as + many / much +名詞+ as”。意為“和一樣”。1. I dont want as expensive a car as this. 我不要這么貴的汽車。 I dont want a car as expensive as this 2. This is as good an example as the other is. 這個(gè)例子和另外一個(gè)例子一樣好。 as 引導(dǎo)比較狀語從句 小結(jié) 第9頁/共24頁as引導(dǎo)時(shí)間狀語從句，表示“當(dāng)時(shí)候”或者“隨著”。eg. _ the day went on, the weather got worse. (全

10、國卷) A.With B. Since C.While D.As答案 D. as 意思為“隨著”。 With不可以引導(dǎo)從句。五.as引導(dǎo)時(shí)間狀語從句第10頁/共24頁as引導(dǎo)時(shí)間狀語從句，意為“當(dāng)時(shí)；同時(shí)，隨著”。作“當(dāng)時(shí)”解,引導(dǎo)時(shí)間狀語從句，表示主句動(dòng)作與從句動(dòng)作同時(shí)發(fā)生。eg. 1.As she left the room she remembered that book. 她離開房間時(shí)想起了那本書。 2.As the sun rose，the fog dispersed. 太陽一出來, 霧隨之消失。as引導(dǎo)時(shí)間狀語從句 小結(jié)第11頁/共24頁as 引導(dǎo)方式狀語從句。eg.Who sho

11、uld be responsible for the accident? The boss, not the workers. They just carried out the order _. (福建卷) A. as told B. as are told C. as telling D. as they told解析：A。as引導(dǎo)方式狀語從句，表按照、正如；as told “從屬連詞 + -ed /-ing 形式” 可以看作是一種省略，即省略了主語和be動(dòng)詞。究竟使用何種非謂語動(dòng)詞形式取決于主被動(dòng)關(guān)系。六.as 引導(dǎo)方式狀語從句第12頁/共24頁as引導(dǎo)方式狀語從句，意為“按照”、“依照

12、”、“像” 。 1.Doctors have said that as many as 40 percent of patients dont take medicine as directed. 醫(yī)生說多達(dá)40%的病人沒有按照被指導(dǎo)的方式吃藥。2. As I explained on the phone, your request will be considered at the next meeting. 按照我在電話里解釋的，你的要求在下次會(huì)議上考慮。as 引導(dǎo)方式狀語從句 小結(jié)第13頁/共24頁as引導(dǎo)原因狀語從句。eg. Jenny was very sad over the lo

13、ss of the photos she had shot at Canada, _ this was a memory she especially treasured. (廣東卷) A. as B. if C. when D. where解析：A。as 作從屬連詞引導(dǎo)原因狀語從句。七.as引導(dǎo)原因狀語從句第14頁/共24頁as和because, since, for的區(qū)別是：1.because語勢最強(qiáng)，用來說明人所未知的原因，回答why提出 的問題，可置于強(qiáng)調(diào)句中且其前可加修飾語。 2.since是雙方都知曉原因或經(jīng)過分析而得之的原因，語氣次之。3.for是并列連詞，前用逗號隔開，表邏輯推

14、理或補(bǔ)充說明。4.as語氣最弱，原因是顯而易見的或已為人們所知，即已知原 因，所引導(dǎo)的分句可置于句首。eg. We had better hurry as it is getting dark. 天變暗了，我們最好快點(diǎn)。as引導(dǎo)原因狀語從句 小結(jié)第15頁/共24頁eg. 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 ma

15、ny解析：如果表示一方是另一方的若干倍時(shí),“倍數(shù)+as+原級形 容詞/副詞+as ”為一常用結(jié)構(gòu)。八. as構(gòu)成的倍數(shù)表達(dá)法twice as many第16頁/共24頁表示倍數(shù)的句型：A +is +倍數(shù)+ as + 形容詞原級 + as；A +is +倍數(shù) + the + size (height, length, width)eg. 這個(gè)廣場是那個(gè)的兩倍大。 This square is twice as large as that one. = This square is twice the size of that one.as構(gòu)成的倍數(shù)表達(dá)法 小結(jié)twice as many第17頁/

16、共24頁eg. Lets learn to use the problem we are facing _ a stepping-stone to future success. (全國卷) A. to B. for C. as D. by解析: C。as作介詞表“作為”，常接在 treat / regard / use / recognize 等動(dòng)詞之后；注意和like的區(qū)別，like“像一樣”。 1.He is a child, and must be treated as such. 他年幼，應(yīng)該當(dāng)孩子對待。2.He acted like a child, while he had gr

17、own up. 他雖已成人，但做事卻像孩子一樣。九.as用作介詞第18頁/共24頁十.as和其它一些詞構(gòu)成連詞1. as long as意思為”只要”。eg. _ I know the money is safe , I shall not worry about it . (北京卷) A. Even though B. Unless C. As long as D While2.as if ( though )意思為“似乎”，從句可用陳述語氣或者虛擬 語氣，有時(shí)還可以省略結(jié)構(gòu)。eg. Eliza remembers everything exactly as if it _ yesterda

18、y. (全國卷) A. was happening B. happens C. has happened D. happenedAs long ashappened第19頁/共24頁十.as和其它一些詞構(gòu)成連詞3.as far as“據(jù)”。eg. I can see, there is only one possible way to keep away from the danger. (北京卷) A. As long as B. As far as C. Just as D. Even if4. as much aseg. as much aseg. The more I think about him, the more reasons I find for loving him _ I did. (湖南卷) A. as much as B. as long as C. as soon as D. as far as解析：A。as much as表程度或數(shù)量；as long as表長度或條 件；as so