1、clean过去式：cleaned。

2、翻译：洁净的; 干净的; 爱干净的; 爱整洁的; 无有害物的; 无污染的。

3、例句：It is your responsibility to keep the room clean and tidy .保持房间整洁是你的职责。

4、I can't find a clean shirt (= one I haven't worn since it was washed) 我找不到一件干净的衬衫。