双写n加ing的单词包括：
1. running
2. swimming
3. sitting
4. cutting
5. getting
6. putting
7. beginning
8. winning
9. shopping
10. stopping
11. dropping
12. digging
13. setting
14. fitting
15. traveling
16. preferring
17. shutting
18. fixing
19. flying
20. babysitting
21. splitting
这些单词在英语中较为常见，掌握这些双写规则有助于提高英语交流的准确性和流畅度。
