【人教PEP版五年級下冊】基數(shù)詞&序數(shù)詞講義及練習【講義部分】一、基數(shù)詞(CardinalNumbers)基數(shù)詞是用來表示數(shù)量的數(shù)字，如：1,2,3,4,等等。它們用于計數(shù)和表達具體的數(shù)目。·基本規(guī)則：·112:one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve.·1319:在個位數(shù)后加“teen”，但要注意thirteen（13）,fifteen（15）,eighteen（18）的拼寫。·20,30,40...90:twenty,thirty,forty,fifty,sixty,seventy,eighty,ninety.·大于20的數(shù)字組合使用連字符連接十位和個位，例如：twentyone（21）,thirtyfive（35）.二、序數(shù)詞(OrdinalNumbers)序數(shù)詞用來表示順序或排名，如：第一（first），第二（second），第三（third），等等。·基本規(guī)則·1st:first·2nd:second·3rd:third·4th至19th:在基數(shù)詞后加th，注意fifth（5th），eighth（8th），ninth（9th），twelfth（12th）的拼寫。·20th,30th,40th...:twentieth,thirtieth,fortieth...·復合序數(shù)詞如21st（twentyfirst）,32nd（thirtysecond）等。【練習部分】一、選擇合適的單詞填空Todayismysister’s______birthday.(five/fifth)Thereare______studentsinourclass.(forty/fortieth)Iliveonthe______floorofthisbuilding.(nine/ninth)Shewasthe______toarriveattheparty.(one/first)Weneed______eggstomakeacake.(three/third)Hefinishedtheracein______place.(two/second)The______dayofschoolisalwaysexciting.(one/first)Thereare______monthsinayear.(twelve/twelfth)Mybrotherisinhis______yearatuniversity.(three/third)Theyhavejustmovedintotheirnewhouseon______Street.(Four/Fourth)二、單選題（）1.Tomorrowwillbethe______timewemeet.A.one B.first C.once D.oneth（）2.Howmanybooksdoyouhave?______.A.Two B.Second C.Twice D.Secondly（）3.It’sthe______dayofthemonth.A.twenty B.twentieth C.twentith D.twentyth（）4.Shegotmarriedonher______birthday.A.twenty B.twentieth C.twentith D.twentyth（）5.Pleaseturntopage______.A.sixth B.six C.sixteens D.sixteenth（）6.Thisisthe______timeI’vevisitedBeijing.A.three B.third C.threeth D.thirdly（）7.Helivesonthe______floor.A.fifth B.fiveth C.five D.fifteenth（）8.Thereare______daysinJanuary.A.thirtyone B.thirtyoneth C.thirtyfirst D.thirtiethone（）9.What’syour______name?A.one B.first C.firstly D.ones（）10.Weneed______applestomakeanapplepie.A.five B.fifth C.fiveth D.fifteen三、用所給詞的適當形式填空Thisisthe______timeI’veeatensushi.(one)Thereare______seasonsinayear.(four)Shewasthe______tofinishtherace.(three)Helivesonthe______floorofthebuilding.(seven)Weneed______cupsofflourtobakeacake.(six)Thisisthe______bookintheseries.(five)Theyhavelivedherefor______years.(eight)The______ofJulyisIndependenceDayintheUSA.(four)It’sthe______timewe’vemetthisyear.(two)Shehaswon______medalsinthepetition.(nine)【參考答案】選擇合適的單詞填空fifth