育才学习网1. 21的英文怎么写
21的英文：twenty-one。
重点词汇：
twenty英 [ˈtwenti] 美 [ˈtwɛnti， ˈtwʌn-]
n.二十，二十个；二十多岁；二十年代；许多，大量
num.二十。adj.二十的。
one英 [wʌn] 美 [wʌn]
num.一个；（数字）一；（基数）一，第一。
twenty-one的用法示例如下：
1.Twenty-one days later, I left London.
二十一天后，我离开了伦敦。
2.Yang Liwei spent about twenty-one hours in space.
杨利伟在宇宙中度过了大约二十一个小时。
3.Has been raised from eighteen to twenty-one.
由原来的十八岁提高到二十一岁。
4.It lasted a record twenty-one days.
那持续一个创纪录的二十一天。
扩展资料：
两位数书写英文中间一定要加上小横线。
twenties英 [t'wentɪz] 美 [t'wentɪz]
n.二十年代；二十，20( twenty的名词复数 )。
twentieth英 ['twentɪəθ] 美 [ˈtwɛntiɪθ， ˈtwʌn-]
n.二十分之一；（某月的）二十日。
adj.第二十的；二十分之一的。num.第二十。
twentieths
n.第二十个（ twentieth的名词复数 ）；二十分之一。
v.第二十个（ twentieth的第三人称单数 ）；二十分之一；第二十的，第二十个的；二十分之一的。
2. 21至100的英语单词怎么写
21.twenty-one 22.twenty-two 23.twenty-three 24.twenty-four 25.twenty-five 26twenty-six 27twenty-seven 28twenty-eight 29twenty-nine 30.thirty 31thirty-one 32thirty-two 33thirty-three 34thirty-four 35thirty-five 36thirty-six 37thirty-seven 38thirty-eight 39thirty-nine 40.forty 41.forty-one 42.forty-two 43.forty-three 44.forty-four 45.forty-five46.forty-six47.forty-seven48.forty-eight49.forty-nine 50 fifty51fifty-one52fifty-two 53fifty-three 54fifty-four 55fifty-five 56fifty-six 57fifty-seven 58fifty-eight 59fifty-nine 60sixty 61sixty-one 62sixty-two 63sixty-three 64sixty-four 65sixty-five 66sixty-six67sixty-seven 68sixty-eight 69sixty-ninenine 70 seventy 71seventy-one 72seventy-two 73seventy-three 74seventy-four 75seventy-five 76seventy-six 77seventy-seven 78seventy-eight 79seventy-nine 80 eighty 81eighty-one 82eighty-two 83eighty-three 84eighty-four 85eighty-five 86eighty-six 87eighty-seven 88eighty-eight 89eighty-nine 90 ninety91ninety-one92ninety-two 93ninety-three 94ninety-four 95ninety-five 96ninety-six 97ninety-seven 98ninety-eight 99ninety-nine 100 one hundred。
3. 21至100的英语单词怎么写
1-10 one two three four five six seven eight nine ten
11-20 eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nineteen twenty
21-29 twenty-one twenty-two twenty-three twenty-four。.
30-39 thirty thirty-one thirty-two 。.
40-49 forty forty-one forty-two forty-three。.
50-59 fifty fifty-one fifty-two fifty-three。..
60-69 sixty sixty-one sixty-two sixty-three。..
70-79 seventy seventy-one seventy-two 。..
80-89 eighty eighty-one eighty-two eighty-three。.
90-99 ninety ninety-one ninety-two ninety-three。
100 one hundred