一、as用作關(guān)系代詞引導(dǎo)定語從句

　　1. as 引導(dǎo)非限制性定語從句，一般不指代某個(gè)具體的名詞或代詞，而是代表整個(gè)主句或主句的一部分。這種從句可放在主句之前，也可以放在主句之后，有時(shí)還可以放在主句的中間。如：

　　As is reported in the newspapers, talks between the two countries are making progress. 正如在報(bào)紙上所報(bào)道的，兩國間的談判有所進(jìn)展。

　　Grammar is not a set of dead rules, as has been said above. 如上所說，語法不是一套死條文。

　　Spiders are not insects, as many people think, nor even nearly related to them. 蜘蛛不是昆蟲，盡管許多人都這樣認(rèn)為，它甚至與昆蟲幾乎沒有聯(lián)系。

　　2. as 引導(dǎo)限制性定語從句，主要用于the sameas(與相同)，suchas(像一樣)，asas(與一樣)。如：

　　She knew he felt just the same as she did. 她知道他的感受和她一樣。

　　Such a man with a good temper as Mr. Li is is easy to get along with. 像李先生這樣好脾氣的人是容易相處的。

　　He smokes as expensive a cigarette as he can afford. 他抽一種他買得起的最貴的煙。

　　二、as作為從屬連詞引導(dǎo)時(shí)間狀語從句

　　表示當(dāng)?shù)臅r(shí)候或一邊一邊，強(qiáng)調(diào)主句的動(dòng)作和從句的動(dòng)作同時(shí)發(fā)生。如：

　　I saw him as he was getting off the bus. 當(dāng)他下公共汽車的時(shí)候我看見了他。

　　The boy was singing a popular song as he was bicycling. 這男孩邊騎車邊唱歌。

　　As she grew older, she became less active. 當(dāng)她長大一點(diǎn)的時(shí)候，就變得不那么活潑了。

　　三、as作為從屬連詞引導(dǎo)原因狀語從句

　　as 引導(dǎo)的原因狀語從句常放在主句前，表示因?yàn)?，由于。如?/p>

　　As she is a model teacher, she gives a good example to others. 因?yàn)樗且幻７督處煟o其他人樹立了一個(gè)好的典范。

　　As he wasnt ready in time, we went to the cinema without him. 由于他沒有及時(shí)準(zhǔn)備好，我們就去看電影了，沒有等他。

　　三、as作為從屬連詞，引導(dǎo)讓步狀語從句

　　as引導(dǎo)讓步狀語從句比較特別，它要求將主語和謂語或謂語的一部分倒裝。如：

　　Old as he is, he is still full of energy. 盡管年紀(jì)大了，但他依然精力充沛。

　　Try as she may, she never succeeds. 盡管她很努力，但總是不成功。

　　Much as I admire Mr. Wang as a poet, I dont like him as a man. 盡管我喜歡王先生的詩歌，但我不喜歡他的為人。

　　注：當(dāng)?shù)寡b后置于句首的名詞為單數(shù)可數(shù)名詞時(shí)，習(xí)慣上不帶冠詞。如：

　　Boy as he was, he was made king. 盡管他還是個(gè)孩子，卻被立為國王了。

　　一、as用作關(guān)系代詞引導(dǎo)定語從句

　　1. as 引導(dǎo)非限制性定語從句，一般不指代某個(gè)具體的名詞或代詞，而是代表整個(gè)主句或主句的一部分。這種從句可放在主句之前，也可以放在主句之后，有時(shí)還可以放在主句的中間。如：

　　As is reported in the newspapers, talks between the two countries are making progress. 正如在報(bào)紙上所報(bào)道的，兩國間的談判有所進(jìn)展。

　　Grammar is not a set of dead rules, as has been said above. 如上所說，語法不是一套死條文。

　　Spiders are not insects, as many people think, nor even nearly related to them. 蜘蛛不是昆蟲，盡管許多人都這樣認(rèn)為，它甚至與昆蟲幾乎沒有聯(lián)系。

　　2. as 引導(dǎo)限制性定語從句，主要用于the sameas(與相同)，suchas(像一樣)，asas(與一樣)。如：

　　She knew he felt just the same as she did. 她知道他的感受和她一樣。

　　Such a man with a good temper as Mr. Li is is easy to get along with. 像李先生這樣好脾氣的人是容易相處的。

　　He smokes as expensive a cigarette as he can afford. 他抽一種他買得起的最貴的煙。

　　二、as作為從屬連詞引導(dǎo)時(shí)間狀語從句

　　表示當(dāng)?shù)臅r(shí)候或一邊一邊，強(qiáng)調(diào)主句的動(dòng)作和從句的動(dòng)作同時(shí)發(fā)生。如：

　　I saw him as he was getting off the bus. 當(dāng)他下公共汽車的時(shí)候我看見了他。

　　The boy was singing a popular song as he was bicycling. 這男孩邊騎車邊唱歌。

　　As she grew older, she became less active. 當(dāng)她長大一點(diǎn)的時(shí)候，就變得不那么活潑了。

　　三、as作為從屬連詞引導(dǎo)原因狀語從句

　　as 引導(dǎo)的原因狀語從句常放在主句前，表示因?yàn)?，由于。如?/p>

　　As she is a model teacher, she gives a good example to others. 因?yàn)樗且幻７督處煟o其他人樹立了一個(gè)好的典范。

　　As he wasnt ready in time, we went to the cinema without him. 由于他沒有及時(shí)準(zhǔn)備好，我們就去看電影了，沒有等他。

　　三、as作為從屬連詞，引導(dǎo)讓步狀語從句

　　as引導(dǎo)讓步狀語從句比較特別，它要求將主語和謂語或謂語的一部分倒裝。如：

　　Old as he is, he is still full of energy. 盡管年紀(jì)大了，但他依然精力充沛。

　　Try as she may, she never succeeds. 盡管她很努力，但總是不成功。

　　Much as I admire Mr. Wang as a poet, I dont like him as a man. 盡管我喜歡王先生的詩歌，但我不喜歡他的為人。

　　注：當(dāng)?shù)寡b后置于句首的名詞為單數(shù)可數(shù)名詞時(shí)，習(xí)慣上不帶冠詞。如：

　　Boy as he was, he was made king. 盡管他還是個(gè)孩子，卻被立為國王了。