按要求写出下列动词的适当形式。
1. catch (第三人称单数) ______________________
2. try (过去式) ______________________
3. wash (第三人称单数) ______________________
4. die (现在分词) ______________________
5. swim (现在分词) ______________________
6. run (过去式) ______________________
7. cut (现在分词) ______________________
8. hurt (过去式) ______________________
9. come (现在分词) ______________________
10. nod (过去式) ______________________
11. hurry (第三人称单数) ______________________
12. do (第三人称单数) ______________________
13. buy (过去式) ______________________
14. play (现在分词) ______________________
15. mix (第三人称单数) ______________________
16. go (过去式) ______________________
17. do (过去式) ______________________
18. stop (过去式) ______________________
19. begin (现在分词) ______________________
20. touch (第三人称单数) ______________________
