本来想把OG上有关AS用法的题全部总结进去，结果发现N多题都涉及as用法。没办法，只有将常用法总结一下。其实都是字典上的。希望对大家有点用处。
As 的用法总结：
Adv.
1. to the same degree or amount: The child sang as sweetly as a nightingale.第二个是连接词]这孩子歌唱得同夜莺般婉转。[as ... as 结构中的第一个as为指示副词;第二个是连接词](t5)
2. for instance：large carnivores, as the bear or lion.大的食肉动物，如熊或狮子
3. When considered in a specified form or relation, usually used before a preposition or a participle ：this definition as distinguished from the second one.这个定义与第二个有区别
man as described by scientists科学家所描述的人类
Pron.
1. That; which; who. Used after same or such: I received the same grade as you did.我和你得分一样.(t8)
2.正如，照:as you know正如你知道的;
就…而言:He's quite good, as boys go.就男孩儿而言，他相当不错了。
Conj.
1. At the same time that; while: You will grow wiser As you grow older.随着你年令的增长, 你会变得更聪明。注意：从句动作先于主句动作之前，只能用when引导从句，不能用as。 (t1e,)
2. To the same degree or quantity that. Often used as a correlative after so or as: You are as sweet as sugar. The situation is not so bad as you suggest.你甜如蜜。情形不如你说的那样糟。
3. In the same manner or way that：Think as I think.像我这样去想
4．For the reason that; because: went to bed early, as I was exhausted.睡得早，因为我精疲力尽了。
5．With the result that: He was so foolish as to lie.他太傻才会撒谎。
6．Though: Great as the author was, he proved a bad model.这位作者尽管了不起，到头来却成了一个坏榜样。Ridiculous as it seems, the tale is true.这个故事看似荒唐，却是真的
7．In accordance with which or with the way in which:
The hotel is quite comfortable as such establishments go.就设备而言，这个旅馆相当舒适。The sun is hot, as everyone knows.太阳非常热，这一点众所周知
Prep.
1. in the capacity, character, condition, or role of: acting as a mediator.充当调解人(t2b,)
2. In a manner similar to; the same as:① On this issue they thought as one.在这个问题上，他们意见一致②his face was as a mask Max Beerbohm
Phrase:
as a whole: adv.总体上 | 
