too...to... 与 enough...to... 与 so...that...的区别

1.too+adj./adv. to+v.太...而不能做某事
例：He is too young to go to school.
他年纪太小还不能上学。
2.adj./adv.+enough to +v.足够...而能做某事
例：He is old enough to go to school.
他足够大了能上学了/他已到了上学的年龄了。
3.so +adj./adv.+that从句 如此...以致
例：He is so old that he can go to school.
通常来说，这三种句型可用于同义句转换，具体如下：
too...to...
=not 反义词 enough to
=so...that 否定句
例：He is too young to go to school.
= He is not old enough to go to school.
= He is so young that he can't go to school.

too..to表示太……以至于，多表示程度很深且不能达到。如：i am too old to learn computer.我年纪太大以至于学部了电脑了。
enought...to则表示足够……。如i am enought clever to cheat on the test.我足够有经验，考试作弊没问题。有一种对我来说小菜一碟，游刃有余的意思在里面。
so...that意思比较中性，翻译起来也比较直白，例如上面的两个句子如果用so..that句型就是：i am so old that i cannot learn computer any more.以及 i am so clever that i could cheat on the test.

too...to + V. 太...而不能...
enough...to + V. 足以能做...的...
so...that...clause 如此...以至于