1~200的序数词如下：

1. first

2. second

3. third

4. fourth

5. fifth

6. sixth

7. seventh

8. eighth

9. ninth

10. tenth

11. eleventh

12. twelfth

13. thirteenth

14. fourteenth

15. fifteenth

16. sixteenth

17. seventeenth

18. eighteenth

19. nineteenth

20. twentieth

希望这些信息对你有所帮助。