1

Here are the verbs in simple past affirmative and negative:

1. Watch - watched - didn't watch
2. Clean - cleaned - didn't clean
3. Stop - stopped - didn't stop
4. Arrive - arrived - didn't arrive
5. Return - returned - didn't return
6. Cook - cooked - didn't cook
7. Walk - walked - didn't walk
8. Visit - visited - didn't visit
9. Work - worked - didn't work
10. Look - looked - didn't look
11. Like - liked - didn't like
12. Iron - ironed - didn't iron
13. Play - played - didn't play
14. Study - studied - didn't study
15. Love - loved - didn't love
16. Open - opened - didn't open
17. Start - started - didn't start
18. Water - watered - didn't water