as...as意為"和……一樣",表示同級(jí)的比較.使用時(shí)要注意第一個(gè)as為副詞,第二個(gè)as為連詞.其基本結(jié)構(gòu)為：as+ adj./ adv.+as.例如：
(1)This film is as interesting as that one.這部電影和那部電影一樣有趣.
(2)Your pen writes as smoothly as mine.你的鋼筆書寫起來和我的一樣流暢.
其否定式為not as/so +adj./ adv.+as.例如：
This dictionary is not as/so useful as you think.這本字典不如你想象的那樣有用.
若有修飾成分,如twice,three times,half,a quarter等,則須置于第一個(gè)as之前.例如：
Your bag is twice as expensive as mine.你的袋子比我的貴一倍.
幾個(gè)關(guān)于as...as的常見句型：
(1)as...as possible
Please answer my question as soon as possible.請(qǐng)盡快回答我的問題.
(2)as...as usual/before
She looks as pretty as before.她看起來和以前一樣漂亮.
(3)as long as...(引導(dǎo)條件狀語從句)
It took us as long as three years to carry out the plan.我們花了長(zhǎng)達(dá)三年的時(shí)間才完成這項(xiàng)計(jì)劃.
(4)as far as
He walked as far as the railway station yesterday evening.昨天傍晚,他一直散步到火車站.
(5)as well as
She cooks as well as her mother does.她燒菜燒得跟她母親一樣好.
一些帶有as...as結(jié)構(gòu)的常見短語歸納：
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
as rich as a Jew像猶太人一樣富裕