1.若涉及數(shù)量或程度，可用“as much+不可數(shù)名詞+as”和“as many+可數(shù)名詞復(fù)數(shù)+as”。如：
He doesn’t pay as much tax as we do / as us. 他沒(méi)我們交的稅款多。
There are not as many restaurants as there were. 現(xiàn)在餐館沒(méi)有過(guò)去多了。
2.“as+形容詞或副詞原級(jí)+as...”意為“和...一樣”，表示同級(jí)的比較，第一個(gè)as為副詞，第二個(gè)as為連詞。
（1）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
The tree is as tall as the building.這棵樹(shù)和那棟樓一樣高。
�。�2）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...
This swimming pool is as wide as it is long.
這個(gè)游泳池寬度和長(zhǎng)度相等。
�。�3）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...，在否定句結(jié)構(gòu)是so/as...as...
He cannot run so/as fast as you.他沒(méi)你跑得快。
He was as handsome as his wife was beautiful.
他長(zhǎng)得很英俊，他的妻子也長(zhǎng)得非常漂亮。
3.as...as的常見(jiàn)句型
�。�1）as...as possible／sb can盡可能的……
Please answer my question as soon as possible．
請(qǐng)盡快回答我的問(wèn)題。
The detective is searching the man as carefully as he can．
那個(gè)偵探正在盡可能仔細(xì)地搜查那個(gè)男子的身體。
�。�2）as...as usual／before像以前一樣……
She looks as pretty as before．
她看起來(lái)和以前一樣漂亮
Though they failed，they still worked as hard as usual．
盡管他們失敗了，但他們?nèi)韵褚郧耙粯优ぷ鳌?/p>
（3）as long as只要，引導(dǎo)條件狀語(yǔ)從句
I will stay with you as long as there is a room free．
要是你有一間空余的房子，我就住在你這里。
You may borrow this book as long as you promise to give it back
只要你答應(yīng)歸還，你就可以把這書(shū)借走。