Відповідь:

1) to stop-stopped

2) to be-was/were

3) to play-played

4)to run-ran

5) to walk-walked

6)to meet-met

7) to come-came

8) to work-worked

9) to go-went

10) to close-closed

11) to take-took

12) to dance-danced

13) to swim-swam

14) to visit-visited

15) to feed-fed

16) to help-helped

17) to eat-ate

18)to open-opened

19) to jump-jumped

20) to read-read