`Ex_1:`
1. was
2. Were - was
3. was
4. started
5. was -taked - won
6. returned
7. went
8. got
9. What time did you go to the bed last night?
10. didn't go
11. met
12. did not buy
13. left
14. went - watched
15. started
`=>` Giải thích:
Công thức thì quá khứ đơn:
- Đối với động từ to be"
(+) S+was/were + O
(-) S + was/ were + not + O
(?) Was/were+ S+ O...?
- Đối với động từ thường:
(+) S+ `V_2`/V-ed + O.....
(-) S+ did not + `V_0` + O....
(?) Did + S + `V_0` + O....?
- Dấu hiệu nhận biết: last weekend, yesterday, 2 years ago,....
$@thubui$