您好,欢迎访问三七文档
数词Learntosaybeforeyousing.按部就班。数词基数词:表示数目序数词:表示顺序基数词的构成:基数词变化特点例句1~12独立的单词one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve13~19以teen结尾如:fourteen,seventeen等13,15,18较特殊,thirteen,fifteen,eighteen20~90的整十位数以ty结尾如:sixty,ninety。但20,30,40,50,80较特殊twenty,thirty,forty,fifty,eighty21~99在整十和个位数之间加连字符“—”28twenty—eight96ninety—six101~999在百位和十位(若无十位,则和各位)之间加and148onehundredandforty—eight406fourhundredandsixhundred百thousand千million百万billion十亿等即使有具体的数词,也不能在它们后面加“s”。如:600sixhundred8百万eightmillion序数词的结构:•一二三特殊记firstsecondthird•th要从四加起fourthsixthseventhtenth•ve要用f代替在把th加上去fifthtwelfth•Eight的后面不要tnine的后面不要e再把th加上去eighthninth•ty变成tie再把th加上去twentieththirtiethfortieth•若像几十几几百几只变个位记心里twenty-first•onehundredandfifty-third序数词前常用定冠词the,有时还可以用不定冠词a,an表示“又一”的意思如:MrLihasasecondcar.李先生另外还有一辆车。Hehastriedasecondtime.他又尝试了一次。数词的应用1.时刻的表达点钟,分钟,秒钟要用基数词(1)“几点钟”用基数词加o'clock,o’clock可省略。如:5点钟five(o'clock)(2)“几点过几分”,≤30分钟,用介词past。如:6:05fivepastsix8:15fifteen(aquarter)pasteight7:30halfpastseven(3)“差几分几点”30分钟,用介词“to”6:40twentytoseven6:45fifteen(aquarter)toseven(4)日常生活中的时间读法常常简化,直接按基数词的顺序读如:6:05sixofive2.年月日的表达(1)年份用基数词如:2000twothousand1905nineteenofive(2)年用基数词,日用序数词2011年5月8号写作:May8,2011读作:Maytheeighth,twothousandandeleventheeighthofMay,twothousandandelven3.世纪,年代表示(在)90年代(in)thenineties(在)19世纪(in)thenineteenthcentury(在)18世纪30年代(in)1730s\1730’s4.编号的表达(1)LessonOne=thefirstlesson第一课(2)BusNo.2=theNo.2bus2路公共汽车(3)表示住所时不用“No.”302房间Room302(读作:roomthreeotwo)(4)如果数字编号比较长,一般用基数词如:第457页Page457(5)电话号码用基数词如:3855633threeeightfivefive(doublefive)sixthreethree5.分数的表达(1)分子用基数词,分母用序数词,分子大于“1”时,分母则加“s”如:1/3onethird2/3twothirds(2)1/2a(one)half1/4onefourtha(one)quarter3/4threefoursthreequarters(3)halfasecond二分之一秒aquarterofasecond四分之一秒6.小数的表达小数要用基数词如:5.5fivepointfive7.百分数的表达百分数要用基数词5%fivepercent(percent)0.8%zeropointeightpercent(percent)8.其他用法(1)基数词+单数名词+形容词构成合成形容词afive—year—oldboy一个五岁的男孩(2)具体数词+metre(s)/kilo(s)long/high/tall/deep/awayTheChangjiangRiveris6,300kilometreslong.长江长6300公里。(3)表达“几十岁”用序数词如:inhisthirties在他三十几岁时。(4)倍数的表达。一倍用once,两倍用twice,两倍以上用基数词+times如:fivetimes五倍StoryTime•Ihaveagoodfriend.HernameisLisa.Sheisn’tChinese,butAmerican.ShelikesstudyinginChina.ShelikesChinesefoodverymuch.ShespenttheSpringFestivalinBeijinglastyear.Shewasveryhappy.ShewatchedTVontheeveoftheSpringFestival.Sheatejiaozithatnight.Herfatherisaworkerandhermotherisateacher.TheyloveChinaverymuch.TheythinkChinesepeopleareveryfriendly.()1.LisaisaChinesegirl.()2.ShespenttheSpringFestivalinBeijinglastyear.()3.Sheatenoodlesthatnight.()4.Hermotherisaworker.()5.TheythinkChinesepeoplearefriendly.TTFFF
本文标题:小升初数词课件
链接地址:https://www.777doc.com/doc-3428450 .html