1.过去进行时如何分辨did与was/were doing?

来源：学生作业帮编辑：神马作文网作业帮分类：综合作业时间：2024/11/19 12:45:42

1.过去进行时如何分辨did与was/were doing?
2.单选：I _______ when he arrived.
A was shopping B shopped C shopping D shops
3.单选I ____ while he was playing the piano.
A was shopping B shopped C shopping D shops
4.填空what ______ you ____ when he arrived?
5.填空what_______you_______while he was shopping?

1、过去式用did,过去进行时用was/were doing
2、A
3、A
4、were doing
5、were doing
这里需要注意when\while的区别.

be doing是进行时那 was或were doing是过去进行时吗? was/were后接doing还是did while+过去进行时,是不是总是sb.+was+doing sth 过去进行时中何时用was?何时用were 用was were的过去进行时怎么变成疑问句过去进行时中的什么时候用was什么时候用were 过去进行时,was 或were 加现在分词,什么时候用were 什么时候用was? 过去进行时的主句都是was/were+doing从句是延续性动词时when/while都可以用,并且动词要用现在分词,从 was were doing 是表示过去将来时吗 was、were与did用法的区别 was或者were后面接一般现在时还是过去时还是现在进行时还是…… 过去进行时由“主语+was/were + 动词ing”构成,可动词ing是非谓语动词