1. tell - told - told
2. speak - spoke - spoken
3. build - built - built
4. forget - forgot - forgotten
5. know - knew - known
6. understand - understood - understood
7. stop - stopped - stopped
8. make - made - made
9. sleep - slept - slept
10. begin - began - begun
11. break - broke - broken
12. draw - drew - drawn
13. fall - fell - fallen
14. feel - felt - felt
15. drink - drank - drunk