When it grew dark, she turned a suitcase into a bed and put the children inside it, covering them with all the clothes she could find.

请教老师：这是新概念75课上的一个句子。

如果改成 When it grew dark, turning a suitcase into a bed and putting the children inside it, she covered them with all the clothes she could find. 是否可以？

为什么？和原句的含义理解上，究竟有哪些差别？