1. one [wʌn]
2. two [tuː]
3. three [θriː]
4. four [fɔː]
5. five [faɪv]
6. six [sɪks]
7. seven [sevn]
8. eight [eɪt]
9. nine [naɪn]
10. ten [ten]
11. eleven [ɪˈlevən]
12. twelve [twelv]
13. thirteen [ˈθɜːtiːn]
14. fourteen [ˈfɔːtən]
15. fifteen [ˈfɪfˈtiːn]
16. sixteen [ˈsɪksən]
17. seventeen [ˈsevntiːn]
18. eighteen [ˈeɪtniːn]
19. nineteen [ˈnaɪntiːn]
20. twenty [ˈtwentɪ]
建议您多读多练，熟练掌握这些单词的发音和拼写。