allen阿蕾
Nine九 Nineteen十九 Ninety-nine九十九Ninth第九 Nineteenth第十九 Ninety-nineth第九十九看单词变化就会明白了 .
喵呜兔几
九(nine) ,十九(nineteen),九十九(ninety-nine)第九(the nineth),第十九(the nineteenth),第九十九(the ninety-nineth)
ling爱吃
第九 第十九 第九十Ninth nineteenth ninetiethninetieth 英['naɪntɪəθ] 美[ˈnaɪntiɪθ] n. 九十分之一; 第九十; adj. 九十分之一的; 第九十的;
侯总大大
1 one first 2 two second 3 three third 4 four fourth 5 five fifth 6 six sixth 7 seven seventh 8 eight eighth 9 nine ninth 10 ten tenth 11eleven eleventh 12twelve twelfth 13threeteen threeteenth 14fourteen fourteenth 15fifteen fifteenth 16sixteen sixteenth 17seventeen seventeenth 18eighteen eighteenth 19nineteen nineteenth 20twenty twentieth 21twenty-one twenty-first 22twenty-two twenty-second 30thirty thirtieth 40forty fourtieth 50fifty fiftieth 60sixty sixtieth 70seventy seventieth 80eighty eightieth 90ninety ninetieth