按要求写出单词：
1.baby(复数) ___________
2.knife(复数) ___________
3.photo(复数)
4.policema(复数)___________
5.tomato (复数) ___________
6.watch (复数) ___________
7.child(复数) ___________
8. sheep(复数) ___________
9.sell (反义词) ___________
10. heavy (反义词)___________
11. here(反义词) ___________
12. early(反义词) ___________
13. cheap(反义词) ___________
14. wrong (反义词)___________
15. small(反义词) ___________
16. easy(反义词) ___________
17. meat (同音词) ___________
18. two (同音词) ___________
19. their(同音词) ___________
20. write(同音词)___________
21. play (第三人称单数)__________
22. study (第三人称单数) __________
23. have (第三人称单数) ___________
24. carry (第三人称单数) ___________
25. go (第三人称单数)___________
26. teach (第三人称单数) ___________
27. stop (现在分词)___________
28. run (现在分词) ___________
29. swim (现在分词)___________
30. get (现在分词)___________
31. friend (形容词)___________
32. worry(形容词) ___________
33. close(形容词) ___________
34. America(形容词)___________
35. break(形容词) ___________
36. good (副词) ___________
37. we (宾格) ___________
38. it (物主代词) ___________