as....as用法的詳細(xì)說(shuō)明
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as....as其基本意思為“與…一樣”，其中的第一個(gè)as為副詞，其后通常接形容詞或副詞(用原級(jí))，第二個(gè)as可用作介詞(后接名詞或代詞)或連詞(后接從句)。下面小編為大家介紹as....as用法的詳細(xì)說(shuō)明，希望對(duì)大家有用。
as....as用法的詳細(xì)說(shuō)明如下：
(1) 在否定句中，第一個(gè) as 也可換成 so。如：
He doesn’t study as [so] hard as his brother. 他學(xué)習(xí)不如他弟弟努力。
(2) 在該結(jié)構(gòu)的兩個(gè)as之間通常接形容詞或副詞的原級(jí)，但若涉及數(shù)量或程度，可用“as much+不可數(shù)名詞+as”和“as many+復(fù)數(shù)名詞+as”。如：
You’ve made as many mistakes as I have. 你犯的錯(cuò)誤和我犯的一樣多。
I haven’t got as much money as I thought. 我不像原來(lái)想像的有那么多錢。
其間接形容詞時(shí)，有時(shí)該形容詞還可修飾另一名詞，但這個(gè)名詞應(yīng)帶有不定冠詞(注意詞序)。如：
She is as good a teacher as her mother. 她和她媽媽一樣是位好老師。
也可說(shuō)。如：She is a teacher as good as her mother.
但不說(shuō)。如：She is as a good teacher as her mother. / They are as good teachers as us.
(3) 第二個(gè)as后接從句時(shí)，該as通常為連詞，但有時(shí)這個(gè)as還充當(dāng)其后從句的主語(yǔ)或賓語(yǔ)，此時(shí)該as實(shí)為關(guān)系代詞。如：
I gave him as much as he could eat. 他能吃多少，我就給了他多少。
We’ve got food for as many people as want it. 我們的食物，無(wú)論多少人吃都?jí)蛄恕?/div>
(4) 該結(jié)構(gòu)根據(jù)情況可用使用以下修飾語(yǔ)。如：(not) nearly, almost, just, nothing like, exactly, not quite, half, one-ten, twice, three times, 30 per cent等，并且這些修飾語(yǔ)必須置于第一個(gè)as之前，而不能置于其后。如：
He doesn’t play half as well as his sister. 他演奏的水平不及他姐姐的一半。
This dress is twice as expensive as that. 這件連衣裙比那件貴一倍。
(5) 若第二個(gè)as引導(dǎo)一個(gè)表示將來(lái)意義的從句，則該從句可用現(xiàn)在時(shí)表示將來(lái)，也可直接使用將來(lái)時(shí)態(tài)。如：
We’ll get there as soon as you do [will]. 你一到，我們就到。
(6) 在非正式場(chǎng)合(尤其是美國(guó)英語(yǔ)中)，有時(shí)可以省略第一個(gè)as。如：
When over forty, he married a woman poor as himself. 他在40多歲時(shí)娶了一個(gè)像他本人一樣窮的女人。
另外，若意思明確，有時(shí)可省略第二個(gè)as及其后的相關(guān)詞語(yǔ)。如：
The radios in that shop will be cheaper, but not as good. 那家商店的收音機(jī)會(huì)便宜些，但質(zhì)量沒(méi)那么好。
“as + 形容詞或副詞原級(jí) + as…” 意為“和……一樣”，表示同級(jí)的比較，但要注意第一個(gè) as 為副詞，第二個(gè) as 為連詞。根據(jù)比較對(duì)象和性質(zhì)的不同又可以把此種結(jié)構(gòu)分為三種：
?。ㄒ唬?ldquo; as … as …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…… " 。例如
The tree is as tall as the building(is) ．
這棵樹和那棟樓一樣高。
注意此結(jié)構(gòu)也常用于形象比喻中： as cool as cucumber 沉著的， as stubborn as a mule 非常頑強(qiáng)的，倔強(qiáng)的， as clear as crystal 非常透明的， as poor as a church mouse 非常貧困的， as busy as a bee 像蜜蜂一樣忙碌， as easy as ABC 像 ABC 一樣容易， as deep as a well 像井一樣深， as light as a feather 像羽毛一樣輕， as soft as butter 像黃油一樣軟。這些短語(yǔ)生動(dòng)活潑，淺顯易懂，記住這些短語(yǔ)可以提高學(xué)生的英語(yǔ)寫作和口語(yǔ)能力。
?。ǘ?ldquo; as … as …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……” 。例如：
This swimming pool is as wide as it is long.
這個(gè)游泳池寬度和長(zhǎng)度相等。
?。ㄈ?ldquo; as … as …結(jié)構(gòu)”用于表示兩個(gè)人或物不同性質(zhì)的比較，表示程度相同或相當(dāng)，意為“……而……”。在否定句中結(jié)構(gòu)是“ so/as…as… ”。例如：
He was as handsome as his wife was beautiful ．
他長(zhǎng)得非常英俊，他的妻子也長(zhǎng)得非常漂亮。
He was as experienced as his brother was green ．
他經(jīng)驗(yàn)豐富，而他兄弟卻涉世未深。
He cannot run so/as fast as you.
他沒(méi)你跑得快。
Danny is not so/as wise as he is witty ．
丹尼為人風(fēng)趣，但欠明智。
需要注意的是： “as + 形容詞或副詞原級(jí) + as…” 結(jié)構(gòu)的變體形式是“ as + 形容詞 + a + 單數(shù)名詞 + as 或 as + many/much + 名詞 + as ”。意為“……和……一樣…… " 。例如：
I don't want as expensive a car as this. ＝ I don't want a car as expensive as this ．
我不要這么貴的汽車。
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。
Tony is as clever a boy as his brother ．