数量词英语答:总结:基数词几十都是-ty结尾的,变序数词时把y变ie,再加-th.二.序数词(表示顺序的数词)①.1~10:first,second,third,fourth,fifth,sixth,seventh,eighth,ninth,tenth.②.11~19:eleventh,twelfth,thirteenth,fourteenth,fifteenth, sixteenth,seventeenth,eighteenth,nineteenth.③.20~100:twentieth,...