sixtieth (60th) 第六十
seventieth (70th) 第七十
eightieth (80th) 第八十
ninetieth (90th) 第九十
这一类全是十位整数的序数词，共八个 。它们的构成方法是：先将相应的十位整数的基数词词尾-ty中的y改成i，然后在加上后缀-eth 。
4、第四类：
thirty-first (31th) 第三十一
sixty-second (62nd) 第六十二
eighty-seventh (87th) 第八十七
ninety-eighth (98th) 第九十八
4.1到50用英语怎么写1到50的英语为：1到20的英语：one、two、three、four、five、six、seven、eight、nine、ten、eleven、twelve、thirteen、fourteen、ffteen、sixteen、seventeen、eighteen、nineteen、twenty 。
21到30的英语：twenty-one、twenty-two、twenty-three、twenty-four、twenty-five、twenty-six、twenty-seven、twenty-eight、twenty-nine、thirty 。31到40的英语：thirty-one、thirty-two、thirty-treethirty-four、thirty-five、thirty-six、thirty-seven、thirty-eight 、thirty-nine、forty 。
41到50的英语：forty-one、forty-two、forty-three、forty-four、forty-five、forty-six、forty-seven、forty-eight、forty-nine、fifty-one 。扩展资料：英语中各种数字的表达1、数词的种类 数词有基序数和序数词两类 。
基数词表示数量的大小，如one, two, three, four等 。序数词表示序数，如first, second, third, fourth等 。
数词与不定代词、冠词、指示代词、形容词性物主代词等被称作限定词 。2、基数变序数（1）第1至第19一般是在基数词后加th，但变化特殊的有one—first, two—second, three—third, eight—eighth, nine—ninth, five—fifth, twelve—twelfth 。
(2)逢十的twenty, thirty…ninety，分别改y为ieth 。如twenty—twentieth, ninety—ninetieth 。
(3)表示第几十几或第几百几十几，只需将个位数改为序数词 。如56—fifty-six—fifty-sixth,635—six hundred and thirty-five—six hundred and thirty-fifth3、基数词读7a686964616fe78988e69d8331333431353338写（1）三位数的读写法：个位与十位之间用连字符“-”；百位与十位之间加and；十位为零时也要加and 。
如：365读作three hundred and six-five605读作six hundred and five(2)大于三位数的读写法：从个位起每三位打一个撇号“'”，第一个撇号读thousand，第二个撇号读million，各撇号之间的数按三位及三位以下的数的读法读 。如：23, 589读作twenty-three thousand five hundred and eighty-nine6, 632, 900读作six million six hundred and thirty-two thousand nine hundred28, 000, 000读作twenty-eight million4、序数词与冠词（1）序数词前一般要加定冠词the 。
如：It's the third time I've been here.这是我第三次到这里来 。（2）表示在原有的基础上增加，即“又一，再一”时，用不定冠词 。
如：Shall I ask her a third time？ 我还要问她一次吗？5、数词语法功能（1）作主语：The second was better.第二个好些 。（2）作表语：She was second in her class.她在班上是第二名 。
（3）作宾语：I was among the first to arrive.我是第一批到的 。（4）作定语：There are fifty states in the US.美国有五十个州 。
5.英语1到100的基数英语1到100的基数：one two three four five six seven eight nine ten eleven twelve thirteen fourteen fifteen sixteen seventeen eighteen nienteen twenty twenty-one twenty-two twenty-three twenty-ffour our twenty-five twenty-six twenty-seven twenty-eight twenty-nine thirty thirty-one thirty-two thirty-three thirty-four thirty-five thirty-six thirty-seven thirty-eight thirty-nine forty forty-one forty-two forty-three forty-four forty-five forty-six forty-seven forty-eight forty-nine fifty fifty-one fifty-two fifty-three fifty-four fifty-five fifty-six fifty-seven fifty-eight fifty-nine sixty sixty-one sixty-two sixty-three sixty-four sixty-five sixty-six sixty-seven sixty-eight sixty-nine seventy seventy-one seventy-two seventy-three seventy-four seventy-five seventy-six seventy-eight seventy-nine eighty eighty-one eighty-two eighty-three eighty-four eighty-five eighty-six eighty-seven eighty-eight eighty-nine ninety nienty-one nienty-two ninety-two ninety-three nienty-four ninety-five nienty-five nienty-six nienty-seven nienty-eight ninety-nine hundred 。