1.过去进行时如何分辨did与was/were doing?2.单选：I _______ when he arrived.A wa_其他解答

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?

人气：391 ℃　时间：2019-10-19 05:25:20

解答

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.