小学英语语法numerals2一.基数词1)1-12,独立成词。onetwothreefourfivesixseveneightnineteneleventwelve2)13--19,由3-9+teen构成。14–fourteen16--sixteen17--seventeen19—nineteen特殊拼写:13–thirteen15--fifteen18—eighteen3)20-90整十位数,以-ty结尾。20—twenty30---thirty40—forty50—fifty80---eighty60---sixty70---seventy90—ninety4)21-99,两位数,十位与个位之间有“-”。21twenty—one55fifty—five99ninety—nine5)101—999,三位数,百位与十位/个位之间加and。101onehundredandone840eighthundredandforty693sixhundredandninety-three6)1,000以上数目,从右向左每三位用“,”分开,分别读为thousand,million,billion。6,500,431,729and—billionmillionthousandhundred41)1-3,first,second,third。2)4-19,相应基数词+th,特殊拼写:fifth,eighth,ninth,twelfth。3)20-90,y变成ie+th,如twentieth。4)21-99,只把个位的基数词变成序数词如twenty-first。5)序数词缩写----数字+最后两字母如1st,2nd,3rd,4th…二.序数词5(序数词构成规律)基变序,有规律,一、二、三,特殊记,面目全非要注意,加th从4起,八少“t”,九去“e”,“ve”要用“f”替,(five,twelve)见“y”变成“i”和“e”,词尾再加“th”,(twenty,thirty,……ninety)若是遇到几十几,只变个位就可以。序数词缩写记清楚,数字后跟两字母。8th1.表示倍数2.表示分数3.表示百分数4.表示小数5.表示四则运算6.表示编号7.表示温度8.表示长宽高9.表示货币10.表示年、月、日、时刻三.数词的应用1.表示倍数一倍once二倍double/twice三倍和三倍以上基数词+times例:Twicethreeissix.三的两倍是六。fivetimesthreeisfifteen.三的五倍是十五。32)有些分数可用half和quarters表示:例:1/2a(one)half1/4a(one)quarter3/4threequarters半年halfayear半小时halfanhour一年半oneandahalfyears(oneyearandahalf)1)分子大于1时,分母序数词的复数形式(加-s)例:2/3two-thirds3/4three-fourths2.表示分数分子基数词1/3One-thirds分母序数词例:0.7zeropointseven326.1threehundredandtwenty-sixpointone3.1415926……threepointonefouronefiveninetwosix……3.表示小数小数点以前的数用基数词读出小数点读作point小数点以后的数用基数词逐个读出例:0.7%zeropointsevenpercent26%twenty-sixpercentFortypercentoftheapplesonthetreearegreen.那棵树上百分之四十的苹果都是绿的。4.表示百分数百分数用基数词读出百分号读作percent例:3+4=7threeplusfourequalsseven.4-3=1fourminusthreeequalsone.4×3=12fourtimesthreeistwelve.12÷4=3twelvedividedbythreemakesfour.5.表示四则运算加+and或plus减-minus乘×times除÷dividedby等于=equals或is或makes6.表示编号The+序数词+名词前面一定要加the名词+基数词首个字母要大写,基数词也可用阿拉伯数字表示第一课第32页第305房间第12路公共汽车TheFirstLesson(在句子中不大写)LessonOnethethirty-secondpagePage32/PageThirty-twoRoom305BusNo.127.表示(摄氏)温度基数词+degreescentigrade(摄氏度)fiftydegreescentigrade(50摄氏度)8.表示长、宽、高长度基数词+单位词+long(长)宽度基数词+单位词+wide(宽)高度基数词+单位词+high(高)深度基数词+单位词+deep(深)例:50米长fiftymeterslong21米宽twenty-onemeterswide3米高threemetershige.1.8米深tonepointeightmetersdeep9.表示货币基数词+货币单位(yuan/dollar/pound)注意:人民币yuan(元)没有复数形式美元:dollar→dollars英镑:pound→pounds10.表示年、月、日、时刻年用基数词,先读前两位,再读后两位月首个字母要大写,并且都有缩写形式日一般用序数词表示例:1949nineteenforty-nineJanuaryAprilJulyOctoberFebruaryMayAugustNovemberMarchJuneSeptemberDecember9月10日Septemberthetenth10月1日Octoberthefirst几点钟基数词+o’clock几点过几分分钟数+past+小时数几点差几分分钟数+to+小时数Whatisthetime?six/sixo’clocksevenfifteen/aquarterpastsevenninethirty/halfpastninesixforty/twentytosevenninetwenty/twentypastninefourofive/fivepastfour练习题:1.写出下列数词相对应的基数词或序数词。1)One.2)Two.3)three.4)nine.5)twelve.6)twenty.7)eighty-eight.8)sixty-two.9)fifty-four.10)fourhundred.11)sixth.12)thirteenth.13)eleventh.14)hundredth.15)ninety-sixth.16)Onehundredandthird.firstsecondthirdninthtwelfthtwentietheighty-eighthsixty-secondfifty-fourthfourhundredthsixthirteenelevenhundredninety-sixOnehundredandthree2.根据提示完成下列英文句子。1)6:30--whattimeisit?--itis.2)4月1日Todayis.3)2+1=3isthree.3.选择填空。1)ofthevisitorsareforeibners.A.ThreefiveB.Three-fifthC.Three-fifthsD.Thirdfive2)Therearepeopleonthesquare.A.hundredsB.hundredofC.hundredsofD.fivehundreds3)Theteacheraskedustowriteacompositioninonehour.A.three-hundred-wordsB.threehundredofwordsC.three–hundreds-wordsD.three–hundred–wordApril1stsixthirty/halfpastsixtwoplusoneCCD4)--WhatisCharliein?--Heisin.A.row,rowFourB.row,RowFourC.rows,fourrowDrows,rowFour.5)–Howmuchisfivesix?--Eleven.A.plusB.minusC.timesD.divided4.写出下列数字的英语读法。1)4/7.2)0.28.3)1/4.4)3.14.5)30%.5)0.7%.BAfoue-seventhsaquarterzeropointtwoeightthreepointonefourzeropointsevenpercentthirtypercent