| as可用作連詞，引導(dǎo)比較、時(shí)間、原因及方式等四種狀語從句，應(yīng)注意的是，引導(dǎo)的比較狀語從句往往有省略；引導(dǎo)的時(shí)間狀語從句一般用一般現(xiàn)在時(shí)而不用一般將來時(shí)；引導(dǎo)原因狀語從句時(shí)與“Because”和“since”引導(dǎo)的從句比較起起來語氣最弱。 as作介詞，意思時(shí)“作為”，“以……身份”。例如：He came to China as a tourist five years ago. 而表示像…一樣時(shí)，like通常作介詞用，而介詞后面通常接名詞，代名詞和動(dòng)名詞。 as in Australia“和在澳大利亞一樣”。 as……as AS +adj(原級(jí))+AS AS +adv(原級(jí))+AS as soon as 一……就 as soon as possible 盡可能快地 as early as possible 盡可能早的 as carefully as you can 盡可能認(rèn)真地 as careful as you can 盡可能認(rèn)真的 1。as是連詞，表示“隨著”的意義。lives是life的復(fù)數(shù)，意義是“生活”。<BR> 2。as是連詞，表示“因?yàn)椋捎凇钡囊饬x。wanting是現(xiàn)在分詞，表示主動(dòng)意義，wanting to buy cars=who want to buy cars。 As的用法小結(jié) as可以作連詞、介詞及關(guān)系代詞和副詞?，F(xiàn)將其用法小結(jié)如下: （一）、 as作連詞的用法: 1.作“在-------期間，當(dāng)----的時(shí)候”引導(dǎo)時(shí)間狀語從句.注意與when、 while的用法區(qū)別。 ①下列情形時(shí),只用as, 而不用when或while。 1)用于表示同一個(gè)人的兩種動(dòng)作交替進(jìn)行,指一邊----一邊. 如: The girl sings as she goes to school. He looked behind occasionally as he went forward in the forest. 2)表示兩個(gè)同步發(fā)生的動(dòng)作或行?意思是隨著-----的發(fā)展.如: As time went on / by, she became more and more beautiful . As children get older, they become more and more interested in everything. 3)表示兩個(gè)短暫行為或事情幾乎同時(shí)發(fā)生.如:I watched her as she read the book. I thought of it just as you opened your mouth. Just as the flying worm hit her face, she gave a loud cry. 4)接在名詞后面表示某一個(gè)年齡段時(shí).如: As a young man, he was active in sports. ②when作"當(dāng)……的時(shí)候"解,可以指較短的(一點(diǎn))時(shí)間,也可指一段時(shí)間。如:When I was at college, I could speak several foreign languages. When the clock struck twelve, I had slept for 2hours. ③ while常表示一段較長的時(shí)間或一個(gè)過程,強(qiáng)調(diào)主句謂語動(dòng)詞與從句謂語動(dòng)詞同時(shí)發(fā)生。如:Work while you work. Play while you play. 2. As =Since 作"既然"、"由于"解,引導(dǎo)原因狀語從句,常用來表示已為人們所知或顯而易見的原因或理由。如: As he’s been ill for ages, I will help him. As / Since you're not feeling well, you may stay at home. As he wasn't ready , we went without him. 3. As =in the way that作"像"、"按照……的方式"解,引導(dǎo)方式狀語從句。如: Do as I told you. Remember, you must do everything as I do. 4. 用于as--- as或not / so/ as ---- as中,前一個(gè)as是副詞,后一個(gè)as是連詞,引導(dǎo)比較狀語從句。如:They helped the old as much as possible. I don't speak English so/ as well as she does. 5. 表示雖然,盡管 等,引導(dǎo)讓步狀語從句,常用倒裝語序,模式為: adj. /adv. / n.+as +主語+謂語+主句。如: Young as he is, he knows much. Tired as they were, they walked on. 6. 表示也------一樣。 She is a doctor, as was her husband. （二）、 as作關(guān)系代詞,引導(dǎo)定語從句,表示正如,這一點(diǎn).如: He is very careful, as we all know. As is well-known, Taiwan belongs to China. 另外,當(dāng)先行詞被the same, such等詞修飾時(shí),常用as來引導(dǎo)定語從句。如: Such a clever girl as she can learn anything quickly. I was reading the same book as he bought yesterday. （三）、as作介詞的用法. 1.表示好像。如:He dressed as a policeman. 2. 表示作為當(dāng)作。如：I found a job as a guide. 3. 當(dāng)某人是某身份時(shí)。如：As a child , she was sent to abroad. 4. as引導(dǎo)的介詞短語大多用作狀語,as譯為"作為";少數(shù)情況可引起賓語補(bǔ)足語。如: As a Party member, I'll take the lead in everything. (狀語) She works as a model. (狀語) She has me as one of her best friends.(引起賓語補(bǔ)足語) （四）、作副詞的用法 1 表示與------等同。如：This dress is twice as expensive as that one. 2 像，如等。如：As before, he remained unmoved. 總之，通過以上的分析，我們對(duì)as的詞性和用法有了比較全面的理解和把握，才能在實(shí)際的運(yùn)用中做到心中有數(shù)，應(yīng)付裕如。 |
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