序数词、分数课件

Numbers英语专项复习数词序数词1.序数词一般由基数词后加th构成，前面一般加定冠词the。第18第2002.以y结尾的基数词构成序数词时，先把y改成i，再加eth。第50第203.不规则的序数词有以下几个first,second,third,fifth,eighth,ninth,twelfth（一定要记住）theeighteenththetwohundredththefiftieththetwentiethfirst1stsecond2ndthird3rdfourth4thfifth5thsixth6thseventh7theighth8thninth9thtwelfth12thtwentieth20ththirtieth30thfortieth40thfiftieth50thsixtieth60thseventieth70theightieth80thninetieth90thC．序数词的缩写形式:阿拉伯数字后加上th。irst—lstsecond—2ndthird—3rdfourth—4thtwentieth—20thtwenty-third—23rdD．序数词的句法功能序数词在句中可作主语、宾语、定语和表语。ThesecondiswhatIreallyneed．（作主语）Hechoosethesecond．（作宾语）Wearetocarryoutthefirstplan．（作定语）Sheisthesecondinourclass．（作表语）4.表示第几十几时，十位用基数词，个位用序数词，十位和各位用连字符-连接第三十一第六十五第七十四第九十九第八十二thirty-firstsixty-fifthseventy-fourthninety-nintheighty-second5.编号的三种表示法1）名词＋基数词LessonThree2）the＋序数词＋名词thethirdlesson3）名词＋数字Lesson3如：5班ClassFive=thefifthclass=Class5一般编码用名词+基数词207房三年级一班第五部分第一课3号汽车第一中学Room207ClassoneGradethreepartfive=thefifthpartlessonone=thefirstlessonBusNo.3=theNo.3busNo.1MiddleSchool四.数词的表示法—编号1、ThisisMrWhite’s____visitinBeijing.Hehasbeentheretwicebefore.A.twoB.secondC.threeD.third2、Thereare____monthsinayear.Octoberisthe____month.A.twelve,tenB.twelfth,tenthC.twelve,tenthD.twelfth,ten3、Thereare____peopleinPeter’sfamily.Theyliveonthe____floorintallbuilding.A.six,eighteenB.six,eighteenthC.sixth,eighteenthD.sixth,eighteen4、_____istheeasiestofall.A.LessononeB.TheLessononeC.LessonFirstD.Thefirstlesson5、Theforeignguestsstayedin____lastnight.A.Room608B.theRoom608C.the608roomD.608theroom注：通常前面要加定冠词the；但出现不定冠词a或an时，则表示“再—”，“又—”。We'llgooveritasecondtime．特别说明：1、世纪、年代、年份、月份时，用介词in2、某一天、星期前用介词on3、某一天早晨、下午或晚上时，用介词on。1、____acoldmorning，theoldmandiedlonelyinhishouse．2、Thegirlwassenttohospital____themorningofMarch20.3、Mysonwasborn_____October2010.4、Peopleareverypoor_____thefifties.Ononinin分数，小数，百分比热门考点一：hundred、thousand、million、billion的考查方法1．和“of”连用，前面不能有具体的数,而且这四个词的本身必须用复数。如hundredsof数以百计的thousandsof数以千计的millionsof数以百万计的billionsof数以十亿计的manyhundredsofstudents.好几百个学生2．当它们的前面有具体的数修饰时,其本身即不能用复数，不能和“of”连用。twothousandstudents两千名学生fivehundredcars五百辆车1、Bytheendoflastyear,wehadplantedaboutfive____trees.A.hundredB.hundredsC.hundredofD.hundredsof2、____booksmustbeproducedforthechildren.A.manythousandsB.manythousandsofC.manythousandofD.manythousand热门考点二：其它重要表达方式的考法1.在某人多少岁in+one’s+几十的复数形式eg:Myparentsareintheirfifties.2．afive-year-oldboyaneight-year-oldgirl3．100-meter-longbridge(100米长的桥)10metersdeep(10米深)4．ten-minutewalk=tenminutes’walk5.twomorehours=anothertwohours.()1、Thehaswrittena___composition．A．three-hundred-wordB．three-hundred-wordsC．threehundredswordsD．threehundredsword()2、Everydaytheoldwomansitsherefor____.A.oneandhalfhourB.oneandahalfhourC.onehoursandahalfD.oneandahalfhours()3、Hebecameveryrich____.A.inhisfortyB.inthefortiesC.inhisfortiesD.intheforty()4、Maryis____girl.A.an8–year-oldsB.an8-year-oldC.an8-years-oldD.a8-year-oldADCB()5、GuangzhouTowerisalmost_____．A．600meterhighB．600metershighC．600-meters-highD．600-meter-high()6、—Haveyougotenoughbooks?—No.Ineed____.A.tenmoreB.moretenC.tenanotherD.othertenBA选择填空。1．Marchis____monthofayear．A．athreeB．thethirdC．athird2．Wewillhaveameetingat8:05____．A．fivetoeightB．eightfiveC．eightofive3．Eightpluseightis____.A．sixteenB．sixty-fourC．one4．Heisan____boy．A．eightyearsB．eight-year-oldC．eight-years-old5．Wewillhavea___walk．A．tenminutesB．tenminutes'C．ten-minutesB．thethirdC．eightofiveA．sixteenB．eight-year-oldB．tenminutes'