as有哪几种用法

as有哪几种用法

①adv.同样，一样 Tom runs fast，but I run just as fast.
②pron a.像…样的人或物 the same as b.这一点 as follows
③prep 作为 as a teacher
④conj a.比较 as white as snow
b.如同 Do it as I do. c.当· · · 时候 I need the letteras I walked along the river.d.由于 We all like her as she is kind.e.以至于 He raised his voice so as to be heard.f.Tiredas they were ，they walked on.
⑤as 构成的短语 as for 对于，就· · · 而论 As for me，I have nothing to say
⑥as…as 结构中第一个 as 是副词 第二个 as 是连词，否定时也可以写成 not so…as
⑦在比较中的倍致表达为同级比较 a.A is as…as B 译为：A 和 B 一样… as 与 as 之间加形容词原级 b.A is 倍数 as…as B 译为： A 是 B 的· · · 倍 c.A is not as/so…asB 译为：“A 不如 B”d.A is halt（a quarter） as…as is 译为：A 是 B 人一半（1/4）。