2019中考英语知识点:数词的基本构成
新一轮 复习备考周期正式开始, 为各位初三考生整理了各学科的复习攻略,主要包括中考必考点、中考常考知识点、各科复习方法、考试答题技巧等内容,帮助各位考生梳理知识脉络,理清做题思路,希望各位考生可以在考试中取得优异成绩!下面是《 英语知识点数词的基本构成》,仅供参考!
数词的基本构成
(一)基数词——从1数到N
1.1—12的基数词是独立的单词,即one,to,three,four,five,six,seven,eight,nine,ten,eleven,telve.
2.13—19的基数词以-teen结尾。如fourteen,seventeen等,但13,15,18较特殊,13—thirteen 15—fifteen 18—eighteen.
3.20—90的整十位均以-ty结尾。如sixty,niy,但20,30,40,50,80较特殊,20—tenty,30—thirty,40—forty ,50—fifty ,80—eighty.
4.十位数与个位数之间要加连字符号“-”,如28—tenty-eight,96—niy-six.
5.百位和十位(若无十位则和个位)之间加and,如148—one hundred and forty-eight ,406—four hundred and six.
6.hundred(百),thousand(千),million(百万),billion(十亿)等前面即使有具体的数词,也不能在它们的后面加s.如600—six hundred,8百万—eight million.
7.1000以上的数字,从后往前数每三位加一个逗号“,”第一个逗号前为千(thousand),第二个逗号前为百万(million),第三个逗号前为billion(十亿)。英语中无“万”这个词,我们可以用“几十个千(thousand)”表示几万,“几百个千(thousand)”表示“几十万”。如2,510=to thousand five hundred and ten;84,296=eighty-four thousand to hundred and niy-six;274,350=to hundred and seventy-four thousand three hundred and fifty.
8.hundred,thousand,million用复数形式修饰名词时要用“of+复数名词”,如数以百计的年轻人hundreds of young people;数以千计的书thousands of books.注意hundreds of /thousands of/millions of +复数名词,其前面不能加具体的数词,但可加several或 many.
Hundreds of ne buildings have sprung up here this year.
Thousands upon thousands of people in South Africa are rising against their oppressors.
Thousands and thousands of people e to visit the city every day.
Millions of dollars have gone into the building of this factory.
(二)序数词——由基数词转变而来,表示“这是第N个”
1.口诀巧记基数词变序数词“一、二、三,特殊记,八去‘t’,九去‘e’,‘ve’要用‘f’替,见‘y’变成‘i’和‘e’,词尾加上‘th’,若是遇到几十几,只变个位就可以。”第一、第二、第三分别first,send,third,eight—eighth nine—ninth,five—fifth,telve—telfth,tenty—tentieth,forty—fortieth,tenty-five—tenty-fifth.
2其余情况均在基数词后加th.如six—sixth,nieen—nieenth ,hundred— hundredth,thousand—thousandth等。
3.序数词有时用缩写形式
first——1st,tenty—send——22th.