clean|cleans|cleaning|cleaned
吃饭前确保你的手是干净的。
Make sure your hands are ___clean before you have your dinner.
她穿着一件干净的白色衬衫。
She wears a ___clean white shirt.
这个房间非常干净和舒适。
The room is very ___clean and nice.
今天早上我要擦窗户。
I'm going to ___clean the windows this morning.
她昨天打扫了她的房间。
She ___cleaned her room yesterday.
她每个星期六早上打扫自己的房间。
She ___cleans her room every Saturday morning.
她现在正在擦黑板。
She is ___cleaning the blackboard now.