资源描述：
《高三英语二轮语法复习专题---数词》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、数词1.基数词变化方式例词1-12单独记one,two,three,four,five,six,seven,eight,nine,ten13-19词尾为后缀・teenthirteen,fburteen.fifteen,sixteen9seventeen,eighteen,nineteen20-90逢十词尾为后缀・lytwenty,thirty,forty,fifty,sixty,seventy,eighty,ninety21-99(逢十词除外)在十位和个位数之间加连字符号twenty-nine,th
2、irty-eirht,forty-seven,fifty-six,sixty-five,seventy・four,eighty-three,ninety-two单位词100:hundred1000:thousand1,000,000:million1,000,000,000:billion(2)101〜999的基数词由百位数后加and,再加十位数或个位数构成。女U:365—>threehundredandsixty-five(3)1000以上基数词的表示方法：从右向左用分节号“，”分节，每三个数字为
3、一节，第一个分节号前用thousand,第二个前用million,第三个分节号前用billion。1,006onethousandandsix1,234onethousand,twohundredandthirty-four12,345twelvethousand,threehundredandfourty-five123,456onehundredandtwenty-threethousand,fourhundredandfourty-six2,418,000,000—>twobillion,fo
4、urhundredandeighteenmillion或twothousand,fourhundredandeighteenmillion(3)基数词在表示确切的数字时，不能使用百、千、百万、十亿的复数形式；但是,当基数词表示不确切数字，如成百、成千上万时，基数词则以复数形式出现。hundredsof数以百计的thousandsandthousandsof成千上万的2.序数词1-10缩写11-19缩写20-90缩写>100缩写1first1st11eleventh11th100ahundredth1
5、00th2second2nd12twelfth12th20twentieth20th1,000athousandth1,000th3third3rdBthirteenth13th30thirtieth30th1,000,000amillionth1,000,000th4fourth4th14fourteenth14th40fortieth40th1,000,000,000abillionthL000,000,000th5fifth5th15fifteenth15th50fiftieth50thtwe
6、nty-third23rd6sixth6th16sixteenth16th60sixtieth60thninety-ninth99th7seventh7th17seventeenth17th70seventieh70thSeighth8th1Seighteenth18thSOeightieth80th9ninth9th19nineteenth19th90ninetieth90h1Otenth10h注：数字较大的序数词，常简写为基数词+th..e.g.20th2.分数分数由基数词和序数词合成，分子用基
7、数词，分母用序数词。若分子大于1时，分母用复数形式，即序数词加・s。带分数的读法为“整数+and+分数”。如：3/4threefourths或threequarters1/3onethird或athird4/5fourfifths1/2ahalf1/4onequarter或aquarter11/2oneandahalf11/4oneandaquarter31/4threeandonefourth或threeandonequarter3.小数整数与小数之间用小数点隔开。读小数时，小数点后面的数字要单独
8、读出。小数点作point(点)，零读作zeroo如果整数是零，往往不读出。如：0.1—>zeropointone或pointone0.03—>zeropointzerothree2.25—>twopointtwofive14」63—>fourteenpointonesixthree4.百分数用percent表示。如：5%—*5percent(缩写■:5.PC),读作fivepercent20%—>twentypercent5.时刻的表达法①分钟数+时钟数半小时以内(含
