so..... that 和 too....to 用法

so that是如此,too to是太...不能
He's so young that he can't join the army.
He's too young to join the army.
...

so...that是太怎么样以至于怎么样
too...to是太怎么样以至于不能怎么样，也就是说too...to句型中to后面的事不能做到的

so that是如此 以至于……
so + ad/ adj + that + 句子
too to是太...不能
too + adj/ adv + to do