too...to 太.以致不能
He is too short to take the book.
very 很
He is very short,so he can't get the book.
enough 足够
He is not tall enough to get the book.
so 所以
He is very short,so he can't get the book.
这里回答说你不能不注意这点
有否定的语态
所以只能是too,只有too有否定的意思
too very enough so的区别和用法.