怎么去眼袋和眼纹:初中英语问题`

来源:百度文库 编辑:高校问答 时间:2024/07/11 16:02:21
这2个句子哪个是对的`
Was he cleaning the blackboard when the techer came in?
Was he clean the blackboard when the techer came in

第一句是对的
过去进行时

前面对,过去进行时