数词复习——初高中英语语法.pptx 18页

初高中英语语法 数词复习 基数词的构成1）1－12,独立成词。onetwothreefourfivesixseveneightnineteneleventwelve2）13--19,由3－9+teen构成。14–fourteen16--sixteen17--seventeen19—nineteen特殊拼写:13–thirteen15--fifteen18—eighteen3）20－90,以-ty结尾。20—twenty30---thirty40—forty50—fifty80---eighty60---sixty70---seventy90—ninety4）21－99，两位数，十位与个位之间有“－”。21twenty—one55fifty—five99ninety—nine5）101—999，三位数，百位与十位/个位之间加and。101onehundredandone840eighthundredandforty693sixhundredandninety-three 144050151770901918806016 序数词的构成1)1－3,first,second,third。2)4－19,相应基数词+th,特殊拼写:fifth,eighth,ninth,twelfth。3)20－90,y变成ie+th,如twentieth。4)21－99,只把个位的基数词变成序数词如twenty-first。5)序数词缩写----数字＋最后两字母如1st,2nd,3rd,4th… 5.The_____questionismuchmoredifficultthanthisone.A.sixthB.sixC.sixteenD.sixty 51.Thereare______monthsinayear.A.twelveB.twelfC.twelvethD.twelfth 1.hundredthousand(表示具体数字)millionbillion2.hundredsthousands(表示概数)millionsbillions三.基数词的用法数词(several)++ofsome/manyhundredsof 1.—Ifa=3,b=4,what’stheanswertotheproblem,a+2ab+1=?—theansweris___.A.twentyeightB.twenty-eighthC.twenty-eight2.Inourschoolseveral__studentsareabletosearchtheInternet.A.hunderdofB.hunderdsofC.hundred 3.Many__sheepwerekilledintheaccident.A.thousandsofB.thousandC.thousands4.Thereareovernine__workersinthefactory,but__ofyoungpeoplehopetoworkinit.A.hundred;hundredsB.hundreds;hundredsC.hundreds;hundred 时间类型表示法例读法整点基数词（+o’clock)1:00﹤30分钟分钟+past+小时2:10=30分钟half+past+小时3:30﹥30分钟（60-分钟）+to+（小时+1）4:40分钟逢15即一刻钟aquarter5:156:45简化法按顺序读基数词7:50oneo’clocktenpasttwohalfpastthreetwentytofiveaquarterpastfiveaquartertosevensevenfifty表示在几点钟用介词at四.数词的表示法—时间 1.—It’salready7:40now.Whenwillthefilmstart?—___.Westillhavefiveminutes.A.AquartertosevenB.Sevenpastforty-fiveC.Aquartertoeight (1)序数词作定语，前面要加the；Thefirsttruckiscarryingafoodbasket．Johnlivesonthefifteenthfloor．SheismyfirstEnglishteacher.(2)有时加a/an，“再一”，“又一”的意思We‘llhavetodoitasecondtime．ShallIaskhimathirdtime？WhenIsatdown，afourthmanrosetospeak．Theyhadasecondchildin1988序数词的用法 1.Infigures(数字),amillionis______.A.10,000B.100,000C.1,000,000D.100,000,000 15分子基数词分母序数词onefifth27分子﹥1分母+stwosevenths14分子a分母quarteraquarter34threequarters12ahalf13threeandonethird3基数词+and+分数四.数词的表示法—分数百分数 1/21/31/424/253/43threefourths/threequartersonethird/athirdtwenty-fourtwenty-fifthsthreeandsixseventhsonequarter/aquarter/onefourthahalfCanyoureadafraction? 1.Theaccidenthappenedon___.A.April5,2001B.2001,April5C.April2001,52.Iwasborn___.A.inMarch8,1993B.onJuly9,1994C.onMay,1995 谢谢~