改被动语态：we must do everything possible to keep environment clean.

分类: 作业答案 • 2021-12-20 03:19:09

问题描述：

答

Everything possible must be done to keep environment clean.
被动语句形式：承受者+be动词+动词的过去分词

答

1.Everything possible is done by us to keep environment clean.
(每件事做动作的承受者)
被动语句形式：承受者+be动词+动词的过去分词

答

Everything possible must be done to keep environment clean.