The students are playing games on the playground.
因为有“正在”所以要用现在进行时be doing,on也可以用in.老师正在上课。一个男孩正在洗脸。爸爸妈妈正在卧室听收音机。这几句各翻译成英语怎么样说？谢谢了。A teacher is having a class.A boy is washing his face.My father and mother are listening to the radio in the bedroom.孩子，不好意思，晚了两年。你几年级了？现在都会了吧？