1-10的基数词：one. two. three. four. five. six. seven. eight. nine. ten.
2、11-19的基数词: eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen.
3、21-29的基数词：twenty-one, twenty-two, twenty-three, twenty-four, twenty-five, twenty-six, twenty-seven, twenty-eight, twenty-nine.
4、20-90的基数词：twenty, thirty, forty, fifty, sixty, seventy, eighty, ninety.
5、100 基数词 ：hundred.
6、1-10的序数词：first. second. third. fourth. fifth. sixth. seventh. eighth. ninth. tenth.
7、11-19的序数词：eleventh, twelfth, thirteenth, fourteenth, fifteenth, sixteenth, seventeenth, eighteenth, nineteenth.
8、21-29的序数词：twenty-first, twenty-second, twenty-third, twenty-fourth, twenty-fifth, twenty-sixth, twenty-seventh, twenty-eighth, twenty-ninth.
9、20-90的序数词：twentieth, thirtieth, fortieth, fiftieth, sixtieth, seventieth, eightieth, ninetieth.
10、100序数词：hundredth.
口诀：基变序，有规律，词尾加上Th。
123，特殊记，8加h，9去e。
f来把ve替，Ty变成tie。
若是几十几，只变个位就可以
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