1. answered

2. was

3. had

4. used

5. was

6. phoned

7. bought

8. lived

9. worked

10. travelled

11. gave

12. was

13. started

14. left

15. moved

16. didn't go

17. Did Lucy stay

`1` answered - dấu hiệu : a few days ago 

`2` was

`3` had

`4` used

`5` was

`6` phoned - dấu hiệu : last night

`7` bought - dấu hiệu : two months ago 

`8` lived - dấu hiệu : ten years ago 

`9` worked - dấu hiệu : two years ago 

`10` travelled - dấu hiệu : when he was young

`11` gave

`12` were

`13` started - dấu hiệu : ten minutes ago 

`14` left

`15` moved - in 2005 

`16` didn't go 

`17` Did/stay - dấu hiệu : last Friday 

`@` Đối với động từ tobe : I/he/she/it/danh từ số ít chia was , we/you/they/danh từ số nhiều chia were

`-` S + was/were + ... 

`-` S + was/were + not + ... 

`-` Was/were + S + ... ? 

`@` Đối với động từ thường : 

`-` S + Ved/V2 + O 

`-` S + didn't + V-inf + O 

`-` Did + S + V-inf + O ?