as…as是什么意思?用法?

as…as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”“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。意思包括和……一樣、當……的時候、因為、盡管等。

as...as的意思和用法

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. 他沒我們交的稅款多。

There are not as many restaurants as there were. 現(xiàn)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(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.這棵樹和那棟樓一樣高。

(2)as...as結(jié)構(gòu)用于表示同一個人或物不同性質(zhì)的比較，意為既...又...

This swimming pool is as wide as it is long.

這個游泳池寬度和長度相等。

(3)as...as結(jié)構(gòu)用于表示兩個人或物不同性質(zhì)的比較，表示程度相同或相當，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?nèi)韵褚郧耙粯优ぷ鳌?/p>

(3)as long as只要，引導(dǎo)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(yīng)歸還，你就可以把這書借走。