原級比較常用“as + 原級 + as”結構，其否定形式為“not as / so + 原級 + as”。
Women are as good as men in sport.
在運動方面，女士和男士一樣優秀。
We didn’t go so far as the others.
我們沒有別人走得那么遠。
Some scientists even say we can live as long as 130 years!
一些科學家甚至說我們能活到130歲！
I wish I could speak English as well as he can.
我希望自己英語講得跟他一樣好。
A friend is not as / so soon gotten as lost.
交友慢，失友快。
在同等比較時，若出現形容詞修飾單數可數名詞，其語序為：as + adj.+ a / an + n. +as。
I do hope so because I want you to live as long and healthy a life as I have.
我的確希望這樣，因為我想要你像我一樣活得健康長壽。
[某些固定搭配]
as far as 一直到 (= so far as)
The park extends as far as the river.
這個公園一直延伸到河邊。
as / so far as I know / remember /see, etc. 據我所知 / 記得 / 看等
As far as I know,the Pacific Ocean is the largest ocean in the world.
據我所知，太平洋是世界上最大的海洋。
as long as 只要 (= so long as)