1.that,用法很多,主要引导定语从句,宾语从句,He told me that he was very tired.
2.so that,连在一起作为连词,表示,因此 He did not run far,so that he could return early.
3.so ...that,如此+形容词 以至于...He was so tired that he could not run any farther.
4.such...that...,如此+名词,+解释句子,He was such a bad runner that he could not keep running for more than 1 hour.