1、first [fɜːst]2、second['sek(ə)nd]3、third[θɜːd]4、fourth[fɔːθ]5、fifth[fɪfθ]6、sixth [sɪksθ]7、seventh ['sev(ə)nθ]8、eighth [eɪtθ]9、ninth ['naɪnθ]10、tenth [tenθ]11、eleventh [ɪˈlɛvənθ] 12、twelfth [twɛlfθ]13、thirteenth [θə:ˈtinθ]14、fourteenth[fɔrˈtinθ]15、fifteenth [fɪfˈtinθ] 16、sixteenth[sɪkˈstinθ] 17、seventeenth [ˌsɛvənˈtinθ]18、eighteenth [eˈtinθ]19、nineteenth [naɪnˈtinθ]20、twentieth [ˈtwɛntiɪθ,ˈtwʌn-]21、twenty-first [ˈtwɛnti fɚst]22、twenty-second [ˌtwentɪ'sekənd] 23、twenty-third [ˌtwentɪ'θɜːd]24、twenty-fourth [t'wentiːf'ɔːθ]25、twenty-fifth [t'wentiːf'ɪfθ]26、twenty-sixth [t'wentiːs'ɪksθ]27、twenty-seventh [t'wentiːs'evnθ]28、twenty-eighth [t'wentiː'eɪtθ]29、twenty-ninth [t'wentiːn'aɪnθ]30、thirtieth [ˈθɚtiɪθ]