too...to
如此...以至于...
引导否定句,引导结果状语从句.主句的主语和从句的主语应是同一人或物.
同义词:so...that...[肯定+否定句都能用]
enough to do sth.[肯定句]
例句+改写
肯定句:The boy is so tall that he can touch the Apple on the table.[so...that..]
=The boy is tall enough to touch the apple on the table.[enough to do sth.]
这个男孩太高了因此他可以摸到桌子上的苹果.
否定句:The boy is so young that he can't go to school.[so...that...]
=The boy is too young to go to school.[too...to]
这个男孩年龄太小了以至于他不能入学.
好巧我们上课刚讲过~
