1、数词一.基数词二.序数词 基数词一.构成:范围范围特点特点例词例词1-12无one,two,.13-19以teen结尾thirteen,fourteen,.整十数以ty结尾forty,fifty,ninety,.非整十数连字符连字符连接连接twenty-five,.整百数1-9加hundredtwo hundred,.几百几十几and,连字符two hundred and twenty整千数1-9加thousandone thousand练一练(1)、12 (2)、18(3)、40 (4)、55(5)、60 (6)、120eighteenone hundred and twentysixtyf
2、ortyfifty-five二.用法:1.构成复合形容词:基数词+名词单数(+形容词),中间用连字符连接。例:一个八岁的男孩:an 8-year-old boy2.表示顺序,编号等,放在名词之后,且名词与基数词首字母大写。(相当于the+序数词+名词)例:Class Four=the fourth class 3.基数词作主语,谓语动词用单数形式。例:Two and three is five.2加3等于5.4.表示人的不确切岁数或年代,用“几十”的复数形式表示。例:He became a professor in his thirties.他三十多岁时成为了教授。5.(one-nine)hu
3、ndred:(1-9)百 hundreds of:数以百计的(one-nine)thousand(1-9)千 thousands of数以千计的6.时间表达:1).顺读法:先读小时,再读分钟。例:7:15:seven fifty2).逆读法:a.当分钟数小于30时,用“分钟数+past+时钟数”,表示“几点过几分”例:8:12 _b.当分钟数大于30时,用“(60-分钟数)+to+下一个时钟数”,表示“几点差几分”例:1:58 练一练1.Three and twenty is _.A.twenty-three B.twenty-third C.twenty and three2.There a
4、re six _ students in our school.A.hundred B.hundreds C.hundreds of3.Mary is a _ girl.A.twelve-years-old B.twelve years old C.twelve-year-old序数词一.构成:范围范围特点特点例词例词第1-第3需要单独记忆first,second,third第4-第19“基数词基数词+th”(第五/第八/第九特殊记)fifth,eighth,ninth第“几十”基数词尾y改成改成 i,再加再加ethtwentieth,thirtieth,.第“几十几”个位个位变成变成序数词序
5、数词twenty-first,.第“几百”(1-9)hundredone hundredth口诀口诀:基变序,有规律,一二三,特殊记,结 尾字母tdd,从四往上th,八去t,九去e,ve要用f替,然后再加th.二.用法:1.序数词前加定冠词,但如果后面的名词前有物主代词与名词所有格时,不加the。例:第一天 _ 我的第一天 _2.序数词的缩写:阿拉伯数字加序数词后两个字母。例:1st,2nd,3rd,4th,.3.分数表示:分子基数词在前,分母序数词在后。当分子大于1时,分母序数词后要加“s”.例:3/5 _ 1/3 _4.月份与日期表示:1).月份+序数词 例:on September 1st2).the+序数词+of+月份 例:on the first of September综合练习1.March is month of the year.A.three B.the third C.third2.There are months in a year.December is the month of the year.A.twelve;twelve B.twelve;twelfth C.twelfth;twelve3.He lives in .A.310 room B.room 310 C.Room 310