such...that 和so...that都是“如此以至于的意思”,区别在于such后面接的是名词,或相当于名词的短语,so后面接的是形容词或相当于形容词的短语.如：
He was such a carelss man that he often left his bag on the bus.或
He was so careless that he often left his bag on the bus.
too...to的意思是”太.而不能“.too后面接形容词或相当于形容词的短语,to后面接动词原形.如
She is too yong to go to school.
He was too busy to answer the phone.