as的用法总结如下：
1、as……as意为“和……一样”，表示同级的比较，其中接形容词或副词的原级，使用时要注意第一个as为副词，第二个as为连词，其基本结构为：as+ adj./ adv. +as。
例句：
I am as tall as you.
我和你一样高。
2、在否定句中，第一个 as 也可换成 so。其否定式为not as/so +adj./ adv. +as.
例句：
He doesn't study as （so） hard as his brother.
他学习不如他弟弟努力。
3、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”。
例句：
He doesn’t drink as much water as we do / as us.
他没我们喝的水多。
There are not as many books as there were.
现在书没有过去多了。
4、其间接形容词时，有时该形容词还可修饰另一名词，但这个名词应带有不定冠词(注意词序)。
例句：
I have as good a voice as you.
我的声音和你一样好。
造句：
1、a complex carbohydrate found in many plants and used as a sweetening agent.
许多植物中的一种碳水化合物，用作增甜剂。
2、He worked as a driver in the factory.
他在工厂里当司机。
3、I also repaired other things such as vacuums、toilets、locks，etc.
我还修理过其他东西，如吸尘器、厕所、锁等等。
4、To move or travel fast, as in an attempt to compensate for lost time.
弥补时间运动或走得更快以便弥补失去的时间
5、She just took his keys and walked out with them, cool as you please.
她拿了他的钥匙就走了，你看这胆子有多大。