表示狀態，思想，感情和感覺的動詞不能表示正在進行的動作
1. 表示感覺，感官的詞
see, hear, like, love, want,
2. have, has當”擁有”講時沒有進行時
3. 一般過去時
表示過去發生的動作或事件， 常和表示過去的時間狀語連用，如yesterday, last night, the day before yesterday, 3 days ago,
含有be動詞的句子， 將動詞變為過去式，am, is的過去式為was，are的過去式為were
I was at the butcher’s.
You were a student a year ago.
The teacher was very beautiful ten years ago.
★變疑問句將be動詞移動到句首
Were you at the butcher’s?
Were you a student a year ago?
Was the teacher very beautiful ten years ago?
★變否定句在be動詞后面加not
I was not at the butcher’s.
You were not a student a year ago.
The teacher was not very beautiful ten years ago.
★肯定回答否定回答
Yes, I was. No, I was not.
Yes, you were. No, you were not.
Yes, he/she was. No, he/she was not.
★特殊疑問句：
What did you do?