基本用法为as+ adj./ adv. +as…。 as…as…意为"和……一样",表示同级的比较。使用时要注意第一个as为副词,第二个as为连词。as…as结构的另一种形式是“as much/many+名词+as+从句”。as…as结构的另一变体形式是“as+形容词原级+名词。
as...as的用法例句
1.若涉及数量或程度，可用“as much+不可数名词+as”和“as many+可数名词复数+as”。如：
He doesn’t pay as much tax as we do / as us. 他没我们交的税款多。
There are not as many restaurants as there were. 现在餐馆没有过去多了。
2.“as+形容词或副词原级+as...”意为“和...一样”，表示同级的比较，第一个as为副词，第二个as为连词。
（1）as...as结构用于表示不同人或物同一性质的比较，意为...和...一样
The tree is as tall as the building.这棵树和那栋楼一样高。
（2）as...as结构用于表示同一个人或物不同性质的比较，意为既...又...
This swimming pool is as wide as it is long.
这个游泳池宽度和长度相等。
as…as双语例句
1.There were as many as 200 people at the lecture.
听讲的有200人之多。
2.It's not as hard as I thought.
这没有我想象的那么困难。
3.Find out as much as you can about him and report back to me.
尽量查找有关他的资料，向我汇报。
4.As far as I am concerned, you can do what you like.
就我而言，你想干什么就可以干什么。
5.As far as I can see, you've done nothing wrong.
依我看，你没有做错任何事。
6.They're welcome to stay here as long as they like.
他们在这里愿意住多久就住多久。