1. read
2. wrote
3. wore
4. began
5. made
6. heard
7. swam
8. rode
9. beat
10. saw
11. spoke
12. told
13. bought
14. held 
15. put

1. read -> read
2. write -> wrote
3. wear -> wore
4. begin -> began
5. make -> made
6. hear -> heard
7. swim -> swam
8. ride -> rode
9. beat -> beat
10. see -> saw
11. speak -> spoke
12. tell -> told
13. buy -> bought
14. hold -> held
15. put -> put