数词 获奖教学设计

2022年智卓教育特别策划专题4数词【中考指导●难点突破】◆中考指导数词就是表示事物的数量和顺序的词，分基数词和序数词两种。河南中考从以下几个方面考查学生对数词的掌握程度：1.基数词的读法2.基数词的用法3.序数词的变法和用法4.分数的表达方法等单位词的用法◆难点突破一.基数词表示数量多少的词是基数词，如：one,two,three等。构成方法如下：1）从1－12分别由从one到twelve12个各不相同的词表示。2）从13－19均以后缀-teen结尾。3）从20－90的整十数词均以后缀-ty结尾。表示“几十几”时，个位和十位之间需加连字符，如twenty-one,thirty-two,forty-three等。4）数字的写法和读法：=1\*GB2⑴十位与个位之间要加连字符“-”；=2\*GB2⑵百位和十位之间要加and；=3\*GB2⑶三位数以上的数，从个位往前数，每三位数加一个逗号“，”，从后往前数的第一个逗号代表thousand,第二个逗号代表million,第三个逗号是billion，注意这几个词不能用复数形式，后也不能加and。5）表示具体、准确的数目时，hundred,thousand,million等数词后不能加-s,如fivehundred,sixthousand,sevenmillion等。6）当hundred,thousand等数词与of连用，表示不具体、不准确的数目时，词尾须加-s。如：thousandsofstudents,millionsoftrees.附：基数词构成简表1one2two3three4four5five6six7seven8eight9nine10ten11eleven12twelve13thirteen14fourteen15fifteen16sixteen17seventeen18eighteen19nineteen20twenty21twenty-one30thirty33thirty-three40forty50fifty60sixty70seventy80eighty90ninety100onehundred二.序数词序数词表示人或事物的顺序，其构成方法如下：1）不规则变化基数词onetwothreefiveeightninetwelve序数词firstsecondthirdfiftheighthninthtwelfth2）以-ty结尾的表示“几十”的基数词，先把y变为i，再加-eth，如thirtythirtieth,fortyfortiethninetyninetieth3）表示“第几十几”时，十位数的“几十”仍用基数词，只把个位部分变成序数词就行了。如：thirty-onethirty-firstforty-twoforty-second等。4）除上述情况外，均在词尾加-th，如tententhonehundredonehundredth附：序数词简表序数词简写式序数词简写式firstsecondthirdfourthfifthsixthseventheighthninthtentheleventhtwelfth1st2nd3rd4th5th6th7th8th9th10th11th12thtwentiethtwenty-firstthirtiethfortiethfiftiethsixtiethseventietheightiethninetiethhundredthonehundredandfirstonehundredandsixty-second20th21st30th40th50th60th70th80th90th100th101st102nd三.数词的用法（一）表示事物的编号基数词放到名词的后边,该名词一般要大写；序数词放到名词的前面，加定冠词。第一课Lesson1/thefirstlesson.Row3/thethirdrow（二）年、日、时刻表达方法。“年”用基数词，“日”用序数词，前要加定冠词。读的顺序是月日年。如：1999年5月2日读作：Maythesecond,nineteenninety。“时刻”用基数词表达，同时要注意以下两点。1.表示“整点”时，在基数词后加o’clock;9:00o’clock.2.分钟小于或等于30分钟的，用“分钟数＋past＋钟点数”形式；分钟数大于30分钟的，用“到下一个钟点所差的分钟数＋to＋下一个钟点数”形式,也可以依次读钟点数和分钟数。7:20twentypastseven或seventwenty.3.注意两个特殊的表示时间的单位词：30分钟用half，15分钟用aquarter，如：6:30读作：halfpastsix5:45读作：aquartertosix6:15读作：aquarterpastsix（三）分数的表达方法表示分数时，分子用基数，分母用序数，分子大于1，分母用复数。分数修饰名词时，后用of短语。如：1/3onethirdofteachers3/7threeseventhsoftheboys1/2,1/4分别用ahalf和aquarter表示。（四）“基数词－名词－形容词”结构“基数词－名词－形容词”只能用来放到名词前作定语。如：Sheisa3-year-oldgirl.Theyliveina7-storey-highbuilding.注：这种结构中名词不能用复数，同时只能作定语。用作表语时，不用连字符，名词有复数。如：Tonyis10yearsoldthisyear.Tonyisa10-year-oldboy.【考题透析●命题展望】例1：Juneisthe_____monthofayear.A.sixB.sixthC.sevenD.seventh解析：表达事物的顺序应该用序数词。答案：B命题规律：此类试题考查学生是否掌握了基数词和序数词的基本用法。例2：Thisisabigclass,and_____ofthestudentsaregirls.A.twothirdB.secondthree C.twothirdsD.twothree解析：根据分数的表达方法“分子用基数，分母用序数；分子大于一，分母用复数”不难找出正确选项。答案：C命题规律：此类试题考查学生是否掌握了分数的表达方法。【专题闯关●新题预测】1.—Eachyear,_______fishesarekilledbythepollutedwaterandmanypeoplearemadesickbythepollutedair.A.millionsofB.millionofC.twomillionofD.twomillionstheteachersinourschoolarewomenteachers.A.ThreequarterB.TwothirdsC.SecondthreesD.Threefour3.—What'sonefourthandahalf,doyouknow?—Yes,it's_________.A.twosixthsB.threefourthsC.onethreeD.threesixths4.Inourclass_________ofthestudentsaregirls.A.threefifthsB.threefifthC.thirdfiveD.thirdfifths5.Nine________poundsaweek?That'sverygood.A.hundredofB.hundredsofC.hundredsD.hundred6.Sharkshavebeenonearthfor________years.A.thousandsofB.twothousandsC.twothousandsofD.thousandof7.________peoplecometoJilintovisitMountA.ThousandsofB.ThousandofC.ThousandsD.Thousand8.Thecomputerwascheap.Ispentonlytwo_________yuanonit.A.thousandsB.thousandC.thousandsofD.thousandof9.About________oftheworkersintheclothesfactoryarewomen.A.thirdfifthsB.thirdfifthC.threefifthsD.threefifth10.Theroadisover________meterslong.A.sixhundredsandfifty–twoB.sixhundredandfifty–two.C.sixhundred,fifty–twoD.sixhundred.fiftyandtwo11.Septemberis_______monthoftheyear.A.ninthB.eighthC.theeighthD.theninth12.It’sabout________kilometersfromNanningtoBeijing.A.twothousandfivehundredandsixty.B.twothousandfivehundredsandsixtyC.twothousandsfivehundredandsixty.D.twothousandsfivehundredsandsixty13.Everyyear,____________fishesarekilledbythepollutedwater.A.millionofB.millionsofC.twomillionsofD.twomillions14.Theboytoldtheoldwoman:“Thetrainwillarriveattwototwo.”itmeans_____.A.2:02B.2:20C.1:58:4015.Sarasaidwewouldmeetat_________infrontofthemuseum.A.onethirtyB.halfanhourC.oneandthirtyD.onepastthirty16.—HowmanypeoplearethereinChangsha?—Aboutsix________.A.millionB.millionsC.millionsofriverthroughourcity,whichisabout________,iscleanagain.meterslongmeterlong18.—What’soneplustwo?—It’