所有的主从复合句，主从句的时态都得一致。一致并不意味着时态完全一样，只要从时间关系上讲得通即可。用as soon as引导时间从句时要注意“主将从现”，即从句用一般现在时表将来。如：I'll tell him about the news as soon as I see him.
原级比较常用“as + 原级 + as”结构，其否定形式为“not as / so + 原级 + as”。
Women are as good as men in sport.
在运动方面，女士和男士一样优秀。
We didn’t go so far as the others.
我们没有别人走得那么远。
Some scientists even say we can live as long as 130 years!
一些科学家甚至说我们能活到130岁！
I wish I could speak English as well as he can.
我希望自己英语讲得跟他一样好。
A friend is not as / so soon gotten as lost.
交友慢，失友快。
在同等比较时，若出现形容词修饰单数可数名词，其语序为：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.
我的确希望这样，因为我想要你像我一样活得健康长寿。
[某些固定搭配]
as far as 一直到 (= so far as)
The park extends as far as the river.
这个公园一直延伸到河边。
as / so far as I know / remember /see, etc. 据我所知 / 记得 / 看等
As far as I know,the Pacific Ocean is the largest ocean in the world.
据我所知，太平洋是世界上最大的海洋。
as long as 只要 (= so long as)
