1. beat, beat, beaten
2. catch caught caught
3. cost cost cost
4. creep creept creept
5. deal dealt dealt
6. fall fell fallen
7. feel felt felt
8. forbid forbade forbidden
9. hide hid hidden
10. lead led led
11. wear wore wore
12. win won won
13. write wrote wrote
14. sell sold sold
15. slide slid slidden
16. shut shut shut
17. hang hung hung
18. kneel knelt knelt