小升初数词

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小升初英语数词TracyTheGreatWallofChina•TheGreatWallofChinaisthelongestwallintheworld.Itisabout6,000kilometerslong,7metershighand5meterswide.TheGreatWallwasbuiltmorethantwentycenturiesago.Itwasverydifficulttobuildsuchagreatwallwithoutanymodernmachines.Thousandsofmendiedwhiletheywerebuildingthewall.HaveyoueverbeentotheGreatWall?Itisveryfamousintheworld.Manyforeignerscometovisititeveryyear.Theylikeitverymuch.月份星期JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecemberMondayTuesdayWednesdayThursdayFridaySaturdaySunday数词1.基数词2.序数词3.数词的应用基数词1.1—12的基数词是独立的单词。one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve2.13—19的基数词以-teen结尾。fourteen,seventeen等,但13,15,18较特殊,13—thirteen15—fifteen18—eighteen3.20—90的整十位均以-ty结尾。sixty,seventy,但20,30,40,50,80,较特殊,20—twenty30—thirty40—forty50—fifty80—eighty90—ninety4.十位数与个位数之间要加连字符号“-”。28—twenty-eight,96—ninety-six5.百位和十位(若无十位则和个位)之间加and,148—onehundredandforty-eight406—fourhundredandsix6.hundred(百),thousand(千),million(百万),billion(十亿)等前面即使有具体的数词,也不能在它们的后面加s。600—sixhundred,8百万—eightmillion7.1000以上的数字,从后往前数每三位加一个逗号“,”第一个逗号前为千(thousand),第二个逗号前为百万(million),第三个逗号前为billion(十亿)。英语中无“万”这个词,我们可以用“几十个千(thousand)”表示几万,“几百个千(thousand)”表示“几十万”。2,510=twothousandfivehundredandten84,296=eighty-fourthousandtwohundredandninety-six274,350=88,065,909=8.hundred,thousand,million用复数形式修饰名词时要用“of+复数名词”。数以百计的年轻人hundredsofyoungpeople;数以千计的书thousandsofbooks注意:hundredsof/thousandsof/millionsof+复数词,其前面不能加具体的数词,但可加several或many。9.基数词+单数名词+形容词构成合成形容词。一个五岁的男孩afive-year-oldboy;一座七层高的建筑物a7-storey-highbuilding.序数词1.基数词变序数词可利用口诀巧记:一、二、三,特殊记,八去“t”,九去“e”,“ve”要用“f”替,见“y”变成“i”和“e”,词尾加上“th”,若是遇到几十几,只变个位就可以.第一、第二、第三分别:firstsecondthirdeight—eighthnine—ninthfive—fifthtwelve—twelfthtwenty—twentiethforty—fortieth,twenty-five—twenty--fifth2.其余情况均在基数词后加th。six—sixth,nineteen—nineteenth,hundred—hundredth,thousand—thousandth数词的应用1.钟点的表示:小时、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。现在是5点钟—It'sfive(o'clock).②“几点过几分,≤30分钟”用介词past。7:05—fivepastseven;7:15—fifteen(aquarter)pastseven;7:30—halfpastseven③“差几分几点”用介词“to”。注意:整点加“1”且用60减去目前的分钟数。7:40—twentytoeight;7:45—fifteen(aquarter)toeight④日常生活中的时间读法常常简化,直接按基数词的顺序读。7:05—sevenofive;7:15—sevenfifteen2.编号的表示:①LessonOne=thefirstlesson第一课;②BusNo.3=theNo.3bus3路公共汽车;③302房间—Room302(读作:roomthreeotwo);④Page457第457页;⑤电话号码,用基数词,可单个读,重复的数字也可读“double”,3855633—threeeightfivefive(doublefive)sixthreethree(doublethree)。如果编号的数词比较长,一般用基数词。3.年月日的表示:①年份用基数词,先读前两位,再读后两位。1999—nine-teenninety-nine;1900—nineteenhundred;2000—twothousand;1905—nineteenofive②年用基数词,日用序数词1998年6月8日写作:June8,1998;读作:Junetheeighth,nineteenninety-eight或theeighthofJune,nineteenninety-eight4.分数的表达:①分子用基数词,分母用序数词,分子大于“1”,分母则加“s”。如:1/3onethird,2/3twothirds;②1/2a(one)half,1/4或a,3/4.5.倍数的表达:一倍用once,两倍用,两倍以上用基数词+times。5倍。特殊用法1.数词作主语,谓语动词用单数。Twomonthsisquitealongtime.Fourandtwoissix.What‘stwoandthree?2.一个半小时(一年半,一个半月可类推)one/anhourandahalf。1.基数词和序数词默写背诵。2.完成数词练习题。3.写好错题本。家长签字

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