例析历年高考试题归结as难点用法.doc
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1例析历年高考试题 归结 as 难点用法河南 谢奎金来源：2009 年上半年《试题与研究》单词 as 词形简单，但用法复杂，可作副词、替代词、关系代词、从属连词和介词还可与其他词汇结合构成诸多搭配，故 as 一直是高考热点，也是广大考生复习备考的难点现结合考题，剖析难点，以飨读者一、用作介词，as 与 like 用法区别[例 1] Let’s learn to use the problem we are facing ______ a stepping-stone to future success.( NMET 2008 全国卷)A. to B. for C. as D. by[解析] Cas 作介词表“作为” ，常接在 treat/regard/recognize/use 等动词之后；而 like 表“像……一样” 试比较：(1)He is a child, and must be treated as such.他年幼，应该当孩子对待2)He acted like a child, while he had grown up.他虽已成人，但做事却像孩子一样。
二、用作从属连词1．表时间，as/when/while 用法区别[例 2] Mother was worried because little Alice was ill, especially ______ Father was away in France. (NMET 1994 全国卷) A. as B. that C. during D. if[解析] A主从句动作先后发生常用 when；两个较长动作同时发生用 while；特别强调主从句动作同时发生用 as，译作 “一边……一边” ， as 还可表“随着” 另 when, while 还可用作并列连词when 表 at that time，而 while 表“两相对照” 2．表原因，as/because/since/for 用法区别[例 3] Jenny was very sad over the loss of the photos she had shot at Canada, ______ this was a memory she especially treasured. (NMET 2006 广东卷)A. as B. if C. when D. where[解析]A。
as 作从属连词引导原因状语从句 as 和 because, since, for 的区别是：because语势最强，用来说明人所未知的原因，回答 why 提出的问题，可置于强调句中且其前可加修饰语； since 是双方都知晓原因或经过分析而得之的原因，语气次之；for 是并列连词，前用逗号隔开，表逻辑推理或补充说明；as 语气最弱，原因是显而易见的或已为人们所知，即已知原因，所引导的分句可置于句首3．表转折，引导让步状语从句[例 4] ______, he talks a lot about his favorite singers after class. (NMET 2005 重庆卷）A. A quiet student as he may be B. Quiet student as he may beC. Be a quiet student as he may D. Quiet as he may be a student[解析] Bas 引导让步状语从句时，形容词、副词、动词等常置前；若表语为名词，前置时使用零冠词；从句谓语动词常和助动词或情态动词 may, might, will, would 等连用。
4．表正如，引导方式状语从句[例 5] —Who should be responsible for the accident?—The boss, not the workers. They just carried out the order ______. (NMET 2008 福建卷)A. as told B. as are told C. as telling D. as they told[解析]Aas 引导方式状语从句，表按照、正如；非限定分句“从属连词+-ed/-ing 形式” 可以看作是一种省略，即省略了主语和 be 动词究竟使用何种非谓语动词形式取决于主被动关系又如：2(1) As I explained on the phone, your request will be considered at the next meeting.（NMET 2005 浙江卷）(2)Doctors have said that as many as 40 percent of patients don’t take medicine as directed.三、用作关系代词，指代整个句子，as/which/it 用法区别[例 6] The Beatles, ______ many of you are old enough to remember, came from Liverpool. (NMET 2006 天津卷)A. what B. that C. how D. as[解析] D。
as 作关系代词，在非限制性定语从句中，可指代整个句子内容，置于句首，而 which 不可； it 为代词，用作句子成分，但不用来连接句子，故常和并列连词连用；在限制性定语从句中常与 such, the same 连用，试比较：(1)I haven’t many toys but I will send you such as I have.我的玩具并不多不过，我会把我仅有的一点玩具送给你2)The book is not such that I can advise you to read it.这本书并不怎么样，我没法向你推介四、用作从句性替代词，等同于 so[例 7] —My room gets very cold at night.—______. (NMET 2007 江苏卷)A. So is mine B. So mine is C. So does mine D. So mine does[解析]C从题干中动词 gets 得知，助动词应选择 do 的适当形式，故排除选项 A 和 B；从语序上考虑，排除选项 D as 用作从句性替代词，等同于 so，只是用于正式语体中。
如：Our eating habits have changed, as has our way of life.五、as…as 结构1．构成倍数比较句型：n times+as…as[例 8] What a table! I’ ve never seen such a thing before. It is ______ it is long.（NMET 2005湖北卷）A. half not as wide as B. wide not as half as C. not half as wide as D. as wide as not half[解析]答案 Cnot 与谓语动词连用构成否定as 作从属连词引导比较状语从句，常见结构为 as...as，第一个 as 为副词，后接形容词或副词，第二个 as 为连词程度修饰语应放在第一个 as 之前2. as/so long as[例 9] —Have you got any idea for the summer vacation?—I don’t mind where we go ______ there’s sun, sea and beach.( NMET 2008 全国卷)A. as if B. as long as C. now that D. in order that[解析] B 。
as long as 最基本词义表示主从句动作延续时间一样长，可引导时间状语从句；若引导条件状语从句，表“只要”，同 only if，为唯一条件又如：As long as I know the money is safe, I shall not worry about it.（NMET 2003 北京卷）3.as far as[例 10] ______ I can see, there is only one possible way to keep away from the danger.（ NMET 2004 北京春季卷）A. As long as B. As far as C. Just as D. Even if[解析] Bas far as I know\can see\am concerned 表据我所知（我看、我所关心的） ；as far as 还表 “远至” 4.as much as[例 11] The more I think about him, the more reasons I find for loving him ______ I did.（NMET 2005 湖南卷）3A. as much as B. as long as C. as soon as D. as far as[解析]A。
as much as 表程度或数量； as long as 表长度或条件； as soon as 尽快；as far as远至，根据若用于否定句中，第一个 as 换为 so例： Young people in the US don’t care so much about fashion as those in China.5.as well as[例 12] John plays football ______, David. (NMET 1994 全国卷)A. as well B. as well as C. so well D. so well as[解析]Bif not better than 为插入语，对考生答题具有一定干扰 as well as 在功能上相当于并列连词，用来连接两个平行成分，但不能用作并列连词注意在连接两个并列谓语动词时，其后的动词使用动词-ing 形式；除此之外，所连接的成分前后应保持平行、对等试比较：⑴ Computers have been put into robots and _____to make mobile phones as well as _______with medical operations. (原创模拟)A. used ; to help B. used; help C. using; helping D. using; helped⑵ Computers have been put into robots as well as _____to make mobile phones and _______with medical operations. (原创模拟)A. used; to help B. having been used;。
