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.

the little girl is not old enought to dress herself

not old enough