Bso+形容词/ 副词+that-从句 【如此.以至于.】为固定用法.再如：He is so short that he can't reach the apple.他是如此之矮以至于够不着那苹果.He runs so fast that none of us can catch him.他跑得如此之快,以...那么其他的为什么不能选？求详细分析，只是因为有that，所以不能选吗so much+不可数名词+that-从句。如：There is so much ice on the road that we have to walk carefully.形容词/副词+enough to do sth足够.....如：He is old enough to look after himeself. 他大了，够照顾自己了。（=He is so old that he can look after himself)too+形容词/ 副词 to do sth【太.....而不能.....】以肯定句式表示否定含义。如：He is too young to look after himself. (=He is so young that he can't look after himself= He isn't old enough to look after himself.)so.....that....与....enough to do ....与 too....to.....经常进行句型转换的。祝你进步！理解请采纳，有问题再问。