Unit4 数词 I 语法考点超级归纳表示数目多少或顺序先后的词叫做数词( Numerals)
数词分为两大类:基数词( Cardinal Numerals)和序数词(Ordinal Numerals)
考点一:基数词基数词表示数目,下面是最基本的基数词,其他数目均由这些基数词构成
1 one 11 eleven 2 two12 twelve20 twenty3 three13 thirteen30 thirty100 a hundred4 four14 fourteen40 forty1,000 a thousand5 five15 fifteen50 fifty1,000,000 a million6 six16 sixteen60 sixty1,000,000,000 a billion(十亿)7 seven17 seventeen70 seventy8 eight18 eighteen80 eighty9 nine19 nineteen90 ninety10 ten除了上表所列的基数词外,其他基数词的构成方法如下表所示
构成例词21~99:由十位数加个位数 1~9 构成,中间须加连字符“-”28 twenty-eight 32 thirty-two 44 forty-four 56 fifty-six67 sixty-seven 79 seventy-nine 81 eighty-one 95 ninety-five101 ~ 999 : 由 1 ~ 9 加hundred 构成百位数,如有十位数及个位数,中间用 and 连接(也可不用),若十位数为 0 时,and 不可省
101 one hundred and one 212 two hundred (and) twelve323 three hundred (and) twenty-three 457 four