as作連詞的用法

1、As 的用法一、as 作連詞的用法1. as.as 的用法as? .as意為“和？樣，表示同級(jí)的比較。使用時(shí)要注意第一個(gè)as為副詞,第二個(gè) as 為連詞。其根本結(jié)構(gòu)為： as+ adj./ adv. +as 例如：(1) This film is as in terest ing as that o ne 這部電影和那部電影一樣有趣 °(2) Your pen writes as smoothly as mi ne 你的鋼筆書寫起來和我的一樣流暢。 其否認(rèn)式為 not as/so +adj./ adv. +as 例如：This dictio nary is not as/so use

2、ful as you think 這本字典不如你想象的那樣有 用。 假設(shè)有修飾成分，如 twice, three times, half, a quarter 等，那么須置于第一個(gè) as 之前。例如：Your bag is twice as expe nsive as mi 門酥的袋子比我的貴一倍 °幾個(gè)尖于asas的常見句型：(1) as.as possiblePlease an swer my questi on as soon as possib 請(qǐng)盡快答復(fù)我的問題。(2) as.as usual/beforeShe looks as pretty as before 也看起來

3、和以前一樣漂亮。(3) as long as 引 I 導(dǎo)條件狀語從句 )It took us as long as three years to carry out the plait 們花了長達(dá)三年的時(shí)間 才完成這項(xiàng)方案。(4) as far asHe walked as far as the railway stat io n yesterday eve nin 昨天黃昏 、他一直散(5) as well asShe cooks as well as her mother doe 她燒菜燒得跟她母親一樣好。一些帶有 as.? as 結(jié)構(gòu)的常見短語歸納：as busy as a be 像蜜蜂

4、一樣忙碌as easy as ABC 像 ABC 一樣容易as deep as a well 像 井一樣深as light as a feathei 像 羽毛一樣輕as soft as butte 像黃; 由樣軟as rich as a JeW 像猶太人一樣富裕2. as 用作連詞引導(dǎo)時(shí)間狀語從句 as 與 when, while 都是引導(dǎo)時(shí)間狀語從句的從 屬連詞，含義都是當(dāng)時(shí)候。但它們有區(qū)別： 用 when 時(shí)，從句的動(dòng)作可以與主句的動(dòng)作同時(shí)發(fā)生， 也可 以 先于主句的動(dòng)作發(fā)生；用 while 時(shí)，從句的動(dòng)作為一過程，主句動(dòng)作與從句動(dòng)作 同時(shí) 進(jìn)行或在從句動(dòng)作過程中發(fā)生；用 as 時(shí)，主句和

5、從句的動(dòng)作同時(shí)發(fā)生，具有 延續(xù)的 含義。例如：(1) It was snowing whe n he arrived at the con struct ion site他至 U 達(dá)工地 時(shí)，天正在下雪。(2) He was watchi ng TV while his mother was cooki ng他母親做飯時(shí)他在看 電視。(3) YOU will grow wiser as you grow older. 你會(huì)隨著年齡的增長而越來越聰明。3. as 用作連詞引導(dǎo)原因狀語從句as, because since 都可以表示因果尖系，連接原因狀語從句，含義是因?yàn)?，?于，但它們有區(qū)別：

6、because 表示的語氣最強(qiáng)； 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(duì)方的、或稍加分析便可得知的 原因， 有時(shí)可譯作既然。例如：(1) He will succeed because he is in earne 他一定會(huì)成功因?yàn)樗苷J(rèn)真。(2) Si nee you are so sure of it he "11b 既然你對(duì)此如此有把握，他會(huì) 相信你的。(3) AS rain has fallen, the air is cooler 因?yàn)橄逻^雨空氣比較清爽 °4. as 作連詞引導(dǎo)讓步狀語從句as 與 although (

7、或 though), however (或 no matter how) 等都可以弓導(dǎo)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(qiáng)，引導(dǎo)的讓步狀語從句用倒裝語序； however 引導(dǎo)讓步狀語從句時(shí)，它的后面可跟形容詞或副詞， 也要用倒裝語序。例如：(1) Although he is quite old, he still jogs every day 他雖然年紀(jì)相當(dāng)大，仍然每 天 慢跑。(2) Stra nge as it may seem, n obody was

8、 injured in the accident 次意夕卜雖然顯 得令人不可思議，卻沒有人受傷。(3) However hard he may try, he will not attai n his goal 無論他怎樣努力也達(dá) 不到 目標(biāo)。二、as作尖系代詞的用法尖系代詞 as 引導(dǎo)定語從句時(shí)，既可以單獨(dú)使用，也可以與其他詞連用，其用 法 要比 that 和 which 更為復(fù)雜。1. as 引導(dǎo)定語從句與其他詞連用 用丁- the same.as 結(jié)構(gòu)中This is the same book as I read last wee 這本書和我上周讀的那本是一樣的。 用于 such.as

9、 結(jié)構(gòu)中I don t like such books as he recomme 我不喜歡他推薦的那些書。 用于"so +adj. + a/an + n.單數(shù))+ as "結(jié)構(gòu)中I am not so strong a man as I wa 我已經(jīng)沒有從前那么強(qiáng)壯了。as 單獨(dú)引導(dǎo)定語從句時(shí)，先行詞可以是一個(gè)詞，也可以是一個(gè)句子或短語。 例 如：(1) She is late, as is often the cas 她遲到了，這是經(jīng)常的事。 ( 先行詞是整個(gè) 主 句)(2) To shut your eyes to facts, as many of you do, is foolish 對(duì)事實(shí)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 )三、as 作介詞的用法as作介詞，意思是作為打以身份“。例如：He came to Chi na as a tourist f