1、該結構的基本意思是“與……一樣”，其中接形容詞或副詞的原級，在否定句中，第一個 as 也可換成 so。如：He doesnt study as [so] hard as his brother. 他學習不如他弟弟努力。
2、若涉及數量或程度，可用“as much+不可數名詞+as”和“as many+可數名詞複數+as”。如：He doesn’t pay as much tax as we do / as us. 他沒我們交的税款多。There are not as many restaurants as there were. 現在餐館沒有過去多了。
3、其間接形容詞時，有時該形容詞還可修飾另一名詞，但這個名詞應帶有不定冠詞(注意詞序)。如：I have as good a voice as you. 我的聲音和你一樣好。
