中考复习专题-基数词、序数词

基数词、序数词数词数词就是表示事物的数量和顺序的词。

基数词

序数词数量顺序一、基数词、序数词基数词序数词

序数词的缩写形式one

twothreefirstsecondthirdtwelfth1～3

1,2,3特殊记1st2nd3rd数字+序数词最后两个字母

4～19/θ/

fourtwelvefivethirteensixfourteensevenfifteeneightsixteennineseventeenteneighteenelevennineteenvefourfisixthseventheighnintenthelevenththfthththte4th11th6th5th7th8th9th10thfthirteenthfourteenthfifteenthsixteenthseventeentheighteenthnineteenthtwelveth12th13th14th15th16th17th18th19th基数词基数词序数词序数词缩写缩写8减t,9去e,ve要由f替，然后再加“th”twelfth

20～90基数词序数词缩写基数词序数词缩写twentysixtythirtyseventyfortyeightyfiftyninetytwentyieththirtiethfortiethfiftiethsixtiethseventietheightiethninetiethy要变ie,最后别忘-th.20th30th40th50th60th70th80th90th21～99基数词序数词缩写twenty-onethirty-twoforty-threefifty-foursixty-fiveseventy-sixeighty-sevenninety-eightninety-ninetwenty-firstthirty-secondforty-thirdfifty-fourthsixty-fifthseventy-sixtheighty-seventhninety-eighthninety-ninth21st32nd43rd54th65th76th87th98th99th“几十几”要注意，个位序数就可以！二、基数词的读法101—999，三位数，百位与十位/个位之间加and。百位数读法101onehundredandone840eighthundredandforty693sixhundredandninety-three千位数及以上数字的读法1,000以上的数字,从右向左每三位用“，”分开,分别读为thousand（千）,million（百万）,billion（十亿）

3214,thousandfourthousand,threehundredandtwenty-one321654,7,thousandmillionsevenmillion,sixhundredandfifty-fourthousand,threehundredandtwenty-one千位数及以上数字的读法321654,987,thousandmilliononebillion,ninehundredandeighty-sevenmillion,sixhundredandfifty-fourthousand,1,billionthreehundredandtwenty-one18,113,024,790试一试：eighteenbillion,onehundredandthirteenmillion,twenty-fourthousand,sevenhundredandninety.基数词的用法、序数词一、表示数量1.十二层楼2.一千二百五十个学生twelve

floors1,250studentshundredsthousandsmillionsbillions数词+3.两百万美元twomilliondollarshundredthousandmillionbillion4.成百上千棵树hundredsoftrees+of(several)（表示概数）（表示具体数量）(some)/(many)基数词的用法二、表示年龄1.十六岁2.在他五十多岁时3.一个八岁的女孩sixteen

yearsoldinhis

fiftiesan

eight-year-old

girlinone’s+整十基数词的复数形式

in

one’s

+整十的复数形式teens十多岁twenties二十多岁forties四十多岁sixties六十多岁nineties九十多岁基数词+名词基数词+名词+形容词复容合词形a

two-month

holidaya

100-metre-long

bridge三、表示编号1.第一课2.五路公交车四、表示年份、年代1.in1998inninteenninety-eight2.in2005intwothousandandfive3.

in1900innineteenhundred4.in1805ineighteenOfive5.inthe1980sinthe

nineteeneightiesLessonOnebusNo.5/No.5bus/3.802号房间Room802年份年代名词+数字读法：一般是两位两位读inthe1850sinthe

eighteenfifties时间类型表示法例读法整点基数词（+o’clock)1:00﹤30分钟分钟+past+小时2:10=30分钟half+past+小时3:30﹥30分钟（60-分钟）+to+（小时+1）4:40分钟逢15即一刻钟aquarter5:156:45简化法按顺序读基数词7:50oneo’clocktenpasttwohalfpastthreetwentytofiveaquarterpastfiveaquartertosevensevenfifty表示在几点钟用介词at五、表示时间序数词的用法一、表示顺序1.第二十一世纪twenty-firstcenturythe序数词前通常要加定冠词“the”,但是如果有形容词性物主代词或名词所有格时不加“the”。2.我的第二辆车mysecondcar3.大卫的第五封信David’sfifthletter序数词可以在句中做主语、宾语、定语和表语。1.ThethirdiswhatIreallyneed.(主语）2.Hechosethesecond.(宾语）3.Weliveonthetwelfthfloor.4.Sheisthesecondinourclass.(定语）(表语）①月日年在2008年10月1日二.表示日期读法：onOctorberthefirst,twothousandandeight日the+序数词月（首字母大写）月日与年之间用，分开年写法：onOct.1st,2008②日月年在2008年10月1日写法：on1stOctober,2008读法：on

thefirstofOctorber,twothousandandeigh