see, hear, like, love, want,
2. have, has当”拥有”讲时没有进行时
表示过去发生的动作或事件， 常和表示过去的时间状语连用，如yesterday, last night, the day before yesterday, 3 days ago,
含有be动词的句子， 将动词变为过去式，am, is的过去式为was，are的过去式为were
I was at the butcher’s.
You were a student a year ago.
The teacher was very beautiful ten years ago.
Were you at the butcher’s?
Were you a student a year ago?
Was the teacher very beautiful ten years ago?
I was not at the butcher’s.
You were not a student a year ago.
The teacher was not very beautiful ten years ago.
Yes, I was. No, I was not.
Yes, you were. No, you were not.
Yes, he/she was. No, he/she was not.
What did you do?