I. 1. went

2. didn't get

3. told - was

4. bought

5. lived

6. didn't visit

7. did you do - played

8. was

9. took

10. ate

II. 1. was listening

2. was picking

3. was walking - saw

4. was sleeping - was running

5. was helping 

6. weren't studying

7. was she doing

8. was doing - phoned

9. was teaching - went

10. was having - rang

- When + QKĐ, QKTD

- While + QKTD, QKĐ

- While + QKTD, QKTD nếu cả 2 HĐ đều xảy ra cùng 1 lúc tại QK.

`-` Thì QKĐ : `\text{S + Ved / V2}`

`-` Thì QKTD : `\text{S + was / were + V-ing}`

`I`.

`1`.went                          `2`.didn't get

`3`.told / was                  `4`.bought

`5`.lived                           `6`.didn't visit

`7`.did ... do ? / played   `8`.was

`9`.took                           `10`.ate

`II`.

`1`.was listening                           `2`.was picking

`3`.was walking / saw                  `4`.was sleeping / was running

`5`.was helping                             `6`.weren't studying

`7`.was ... doing ?                         `8`.was doing / was phoned

`9`.was teaching / went              `10`.was having / rang

`\text{@ TheFox}`