You want to use the "so ~ that" pattern to help you explain why you can or can't do something.

使用 “so ~ that”句型可以帮助你解释你能够或者不能够做某事的原因。

so that 课堂 - SpeakingMax英语口语达人

That's why "is a very good pattern for showing why you do or do not do something.

That's why”是一个非常好的句型，它可以表达你做或不做某事的原因，

That's why 课堂 - SpeakingMax英语口语达人