1. 基本用法

該結(jié)構(gòu)的基本意思是“與……一樣”，其中接形容詞或副詞的原級(jí)，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. 涉及數(shù)量或程度的用法

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。

3. 有關(guān)詞序的一點(diǎn)說明

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：

I have as good a voice as you. 我的聲音和你一樣好。

4. 該結(jié)構(gòu)的修飾語(yǔ)

根據(jù)情況可用(not) nearly, almost, just, nothing like, exactly, not quite, half, one-ten, twice, three times, 30 per cent等修飾，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：

This room is twice as large as that one. 這個(gè)房間是那個(gè)房間的兩個(gè)大。

You’re not half as clever us you think you are. 你遠(yuǎn)不是自己想像的那么聰明。

It took three times as long as I had expected. 這件事比我預(yù)料的多花了兩倍的時(shí)間。