1.若涉及數量或程度，可用“as much+不可數名詞+as”和“as many+可數名詞復數+as”。如：

　　He doesn’t pay as much tax as we do / as us. 他沒我們交的稅款多。

　　There are not as many restaurants as there were. 現在餐館沒有過去多了。

　　2.“as+形容詞或副詞原級+as...”意為“和...一樣”，表示同級的比較，第一個as為副詞，第二個as為連詞。

　�。�1）as...as結構用于表示不同人或物同一性質的比較，意為...和...一樣

　　The tree is as tall as the building.這棵樹和那棟樓一樣高。

　�。�2）as...as結構用于表示同一個人或物不同性質的比較，意為既...又...

　　This swimming pool is as wide as it is long.

　　這個游泳池寬度和長度相等。

　�。�3）as...as結構用于表示兩個人或物不同性質的比較，表示程度相同或相當，意為...而...，在否定句結構是so/as...as...

　　He cannot run so/as fast as you.他沒你跑得快。

　　He was as handsome as his wife was beautiful.

　　他長得很英俊，他的妻子也長得非常漂亮。

　　3.as...as的常見句型

　�。�1）as...as possible／sb can盡可能的……

　　Please answer my question as soon as possible．

　　請盡快回答我的問題。

　　The detective is searching the man as carefully as he can．

　　那個偵探正在盡可能仔細地搜查那個男子的身體。

　�。�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，但他們仍像以前一樣努力工作。

　　（3）as long as只要，引導條件狀語從句

　　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

　　只要你答應歸還，你就可以把這書借走。