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1、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
2、间有“-”。21twenty—one55fifty—five99ninety—nine5)101—999,三位数,百位与十位/个位之间加and。101onehundredandone840eighthundredandforty693sixhundredandninety-three144050151770901918806016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t
3、wenty-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.sixty51.Thereare______monthsinayear.A.twelveB.twelfC.twelvethD.twelfth1.hundredthousand(表示具体数字)millionbillion2.hundredsthousands(表示概数)millionsbillions三.基数词的用法数词(several)++ofsom
4、e/manyhundredsof1.—Ifa=3,b=4,what’stheanswertotheproblem,a+2ab+1=?—theansweris___.A.twentyeightB.twenty-eighthC.twenty-eight2.Inourschoolseveral__studentsareabletosearchtheInternet.A.hunderdofB.hunderdsofC.hundred3.Many__sheepwerekilledintheaccident.A.thousandsofB.thousandC.thousands4.Thereareov
5、ernine__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’clocktenpasttwohalfpastthreetwentytofivea
6、quarterpastfiveaquartertosevensevenfifty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
7、.(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.100,000,00015分子基数词分母序