Question

so.…that+句型的否定可以与什么或什么互换

Answer 1

当that引导的从句为否定式且从句主语与主句的主语相同时，so…that可转换为too…to结构；若从句主语与主句的主语不相同时，so…that可转换为too…for sb to结构。例如：
She is so young that she can’t go to school. ＝She is too young to go to school. The box is so heavy that he can’t carry it. ＝The box is too heavy for him to carry
so…that与enough to的转换
1. 当that引导的从句为肯定式时，若从句主语与主句主语相同时，so…that可转换为enough to结构；若从句主语与主句主语不相同时，so…that可转换为enough for sb to结构。例如：
Xiao Lin is so old that he can go to school. ＝Xiao Lin is old enough to go to school. The box is so light that he can carry it. ＝The box is light enough for him to carry. 2. 当that引导的从句为否定式时，若从句主语与主句主语相同时，so…that可转换为enough to的否定结构；若从句主语与主句主语不相同时，so…that可转换为enough for sb to的否定结构。同时要注意，转换后的形容词（副词）要用其相应的反义词。例如：
The man is so old that he can’t go to work. ＝The man isn’t young enough to go to work.
The desk is so heavy that I can’t move it. ＝The desk isn’t light enough for me to move.