1. see - seen
2. cut cut
3. work - worked
4. leave - left
5. feed - fed
6. bring - brought
7. swim - swum
8. buy - bought
9. drink - drunk
10. go - gone
11. caght - caught
12. read - read
13. arrive - arrived
14. make - made
15. give - given
16. sing - sung
17. teach - taught
18. ring - rung
19. do - done
20. eat - eaten