The little girl is too young to dress herself 改同义句

The little girl is not old enough to dress herself
知识
too...to...结构与...enough to...结构及so...that...结构的相互转换
1.将too...to...结构转换为...enough to...结构时要注意：①enough前的形容词或副词须是too前面形容词或副词的反义词；②...enough to ...句式须用否定式；③too...to...结构有逻辑主语时,...enough to...结构也要加上逻辑主语.例如：
She is too young to do the work.→ She isn't old enough to do the work.
2.将too...to...结构转换为so...that...结构时要注意：①so...that...结构是复合句,so的后面接形容词或副词,that的后面接从句；②that后面的从句要用否定形式.例如：
She is too young to do the work.→She is so young that she can't do the work.