1. think thought thought
2. drink drank drunk
3. sit sat sat
4. lose lost lost
5. have had had
6. hear heard heard
7. sleep slept slept
8. find foun found
9. say said said
10. fly flew flown
11. read read read
12. give gave given
13. tell told told
14. understand understood understood
15. come came come
16. get got got
17. wear wore worn
18. forget forgot forgotten