1. I (be)......was......a student 2 years ago.
2. He (be)...was.... a doctor two years ago.
3. They (be)..are.... farmers last year.
4. Lan and Ba (be) ....are...nurses last year.
5. It (be not)....wasn't...... cold yesterday.

Giải thích:

Cấu trúc thì quá khứ đơn với động từ là tobe: 

(+): S+was/were+O

(-): S+wasn't/weren't+O

(?): Was/ were+ S + O?

Thì quá khứ đơn được dùng khi có các dấu hiệu: yesterday,last year, last week

______

#trangvtqqb

#hd247

`1.` was

`2.` was 

`3.` were 

`4.` were 

`5.` was not 

`==========`

`@` Cấu trúc thì Quá Khứ Đơn:

`+` Động từ tobe:

`(+)` S + was/ were + O

`(-)` S + was/ were + not + O

`(?)` Was/ were + S + O..?

`-` I/ He/ She/ It/ N số ít + was

`-` We/ You/ They/ N số nhiều + were

`->` Dấu hiệu nhận biết: yesterday, last, ago, in, ...