基数词变序数词的方法（数词的用法）七年级英语上册

Grammar数字的表达方式基数词：表示数目的多少，如one,two,three等110十几（teen）几十（ty）1one11eleven2two12twelve20twenty3three13thirteen30thirty4four14fourteen40forty（去掉u)5five15fifteen50fifty6six16sixteen60sixty7seven17seventeen70seventy8eight18eighteen80eighty9nine19nineteen90Ninety10ten几十几21twentyone32thirtytwo44fortytwo55fiftyfive67sixtyseven79seventynine88eightyeight94ninetyfour基数词变序数词口诀：一二三特殊记，th从四起八加h九去e，ve要用f替整十基数变序数，结尾y改为ie要是碰到几十几，前基后序要牢记！序数词：表示顺序的数词，如first（第一），second（第二）third（第三）等序数词前一定要加定冠词the、物主代词或名词所有格第1第19第20第90第一first1st第二十twentieth20th第二second2nd第三十thirtieth30th第三third3rd第四十fortieth40th第四fourth4th第五十fiftieth50th第五fifth5th第六十sixtieth60th第六sixth6th第七十seventieth70th第七seventh7th第八十eightieth80th第八eighth8th第九十ninetieth90th第九ninth（去掉e）9th第几十几第十tenth10th第二十一twentyfirst21st第十一eleventh11th第三十二thirtysecond32nd第十二twelfth12th第四十三fortythird43rd第十三thirteenth13th第五十四fiftyfourth54th第十四fourteenth14th第六十五sixtyfifth65th第十五fifteenth15th第七十六seventysixth76th第十六sixteenth16th第八十七eightyseventh87th第十七seventeenth17th第九十八ninetyeighth98th第十八eighteenth18th第九十一ninetyfirst91st第十九nineteenth19th第四十二fortysecond42nd第五十三fiftythird53rd基数词、序数词专项练习（一）写出下列词的序数词形式one2.two3.six4.fortynine6.twelve7.eight8.twentyone写出下列单词的基数词形式third5.nineteenthfourth6.thirtyfirsttenth7.fortysecondtwentieth8.eightieth根据句子意思填空Children’sDay（儿童节）isontheofJune（六月）.Therearemonths（月）inayear（年）.Teachers’Day（教师节）isontheofSeptember（九月）.Threeplus（加）sixis.Thisismy（第一次）timeinNanning.Sundayisthedayofaweek.Septemberisthemonthofayear.Thereare(28)daysinFebruary（二月）.Therearedaysinaweek.Iam，wehaveaspecialpartyformybirthday.（用nine变换）【答案】1.first2.second3.sixth4.fortieth5.ninth6.twelfth7.eighth8.twentyfirst1.three2.four3.ten4.twenty5.nineteen6.thirtyone7.fortytwo8.eighty1.sixth2.twelfth3.tenth4.nine5.first6.first7.ninth8.twentyeight9.seven10.nine;ninth基数词、序数词专项练习（二）默写序数词口诀:特殊记，从四起；八加九去，ve要用替整十基数变序数，要把改为；要是遇到几十几，前后要牢记二、填空（）1.Todayismybirthday.thefifteenthB.fifteenthC.fifteen（）2.Thisishertimetoplaypiano.twoB.secondC.thesecond（）3.Thereareminutes（分钟）inanhour（小时）.sixtyB.sixtiethC.sixteenD.six（）4.Adamistwentyfouryearsold.Todayishisbirthday.twentiethfourB.twentyfourC.twentyfourthD.twentiethfourth（）5.Iammyparents’child.secondB.oneC.twoth（）6.Hewastogettoourclassroom.threeB.threethC.thirdD.thethird（）7.Mayismonthofayear.thefifthB.thefiveC.fifthD.five（）8.NewYear’sDayisdayinayear.firstB.thefirstC.oneD.theone（）9.Therearefloors（楼层）inthebuildingandhelivesonthefloor.eighteen,fifteenB.eighteenth,fifteenthC.eighteen,fiveteenD.eighteen,fifteenth（）10.MybirthdayisinApril（四月），themonthofayear,fifth