84 eighty- four
85 eighty- five
86 eighty- six
87 eighty- seven
88 eighty- eight
89 eighty- nine
90 ninety
91 ninety-one
92 ninety- two
93 ninety- three
94 ninety- four
95 ninety- five
96 ninety- six
97 ninety- seven
98 ninety- eight
99 ninety- nine
8. 第13~31的英文怎么写 13th=thirteenth 14th=fourteenth 15th=fifteenth 16th=sixteenth 17th=seventeenth 18th=eighteenth 19th=nineteenth 20th=twentieth 21th=twenty-first 22th=twenty-second 23th=twenty-third 24th=twenty-fourth 25th=twenty-fifth 26th=twenty-sixth 27th=twenty-seventh 28th=twenty-eighth 29th=twenty-nineth 30th=thirtieth 31th=thirty-first 总之，基数词变序数词多是加th就行了，不过在遇到y时，应把y改为i，再加-eth.如twenty变为序数词为twentieth 望采纳
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