英语 英语.(21 22:23:25)so...as...  和 as.as...分别怎么用?有什么区别?

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英语 英语.(21 22:23:25)
so...as...  和 as.as...分别怎么用?有什么区别?

两者都用于比较级,表示"..和...一样..",但是so ...as用于否定句,as...as..可用于肯定和否定两种形式.
He is as tall as Tom.(他和Tom 一样高. 不能表达为:He is so tall as Tom.
He is not as tal as Tom=He is not so tall as Tom(他不如Tom高).

肯定句中只能用as as 否定句中都可以使用

so as 是否定和疑问句使用
as as 是肯定.
as___as 中间要用原级或者是副词.

比如He is as clever as me..