江苏省盐城东台市唐洋镇英语二轮复习 数词教案VIP专享VIP免费

江苏省盐城东台市唐洋镇英语二轮复习数词教案【教学目标】1.掌握数词的含义2.掌握数词在各种语境中的应用【重点难点】一，基数词与序数词的概念二,基数词如何转换成序数词三,如何在各种语境中正确应用数词【预习指导】一，什么是基数词？（表示人或事物数目的词叫基数词。）基数词的构成1-12的数,这些数词在中考中出现的频率较高，需要识记1→one2→two3→three4→four5→five6→six7→seven8→eight9→nine10→ten11→eleven12→twelve13-19的词（这些词要注意观察，根据规律teen记忆）13→thirteen14→fourteen15→fifteen16→sixteen17→seventeen18→eighteen19→nineteen20-90整十的数这些词要根据规律ty记忆，中考中出现频率较高的是twenty,forty,fifty,ninety20→twenty30→thirty40→forty50→fifty60→sixty70→seventy80→eighty90→ninety100→onehundred几十几的两位数（由整十的数加“-”加1-9的个位数21→twenty-one34→thirty-four36→thirty-six48→forty-eight53→fifty-three67→sixty-seven72→seventy-two75→seventy-five85→eighty-five88→eighty-eight98→ninety-eight99→ninety-nine三位数（百位后加hundred,百位和十位之间用and连接，十位和个位之间用几十几的读法和写法）125→onehundredandtwenty-five368→threehundredandsixty-eight450→fourhundredandfifty888→eighthundredandeighty-eight999→ninehundredandninety-nine108→onehundredandeight509→fivehundredandnine百hundred,千thousand,百万million,十亿billion四位数或四位以上的数,先从右往左数，每三位用“，”隔开，第一个“，”表示thousand,第二个“，”表示million,第三个“，”表示billion,逗号与逗号之间用几百几十几的表达方法。33333333333→33，333，333，333thirty-threebillion,threehundredandthirty-threemilliom,threehundredandthirty-threethousand,threehundredandthirty-three570208944059→570,208,944,059fivehundredandseventybillion,twohundredandeightmilliom,ninehundredandforty-fourthousand,andfifty-nine表示具体，准确的数时，hundred,thousand,milliom,billion等词后面不能加”s”,如：fivehundredstudents,ninethousandpeople,twomillion当表示不具体，不准确的数时，加“s”，与”of”连用。如：hundredsofstudents,milliomsoftrees二，什么是序数词？表示人或事物顺序的词叫序数词。one→firsttwo→secondthree→thirdfour→fourthfive→fifthsix→sixtheight→eighthnine→ninthtwelve→twelfththirteen→thirteenthfourteen→fourteentheighteen→eighteenthnineteen→nineteenthtwenty→twentietheighty→eightiethninety→ninetiethonehundred→onehundredth如何将基数词转换成序数词？(口诀)基变序，有规律末尾加上“th”four---fourth一二三，特殊记firstsecondthird“ve”要用“f”替five---fifthtwelve---twelfth八去“t”,九去“e”eight---eighthnine---ninth末尾“y”变“ie”twenty---twentieth如果遇到几十几只变末位就可以thiety-one----thirty-firsteighty-five----eighty-fifth当序数词用阿拉伯数字表示时，必须在数字后加上相应序数词的最后两个字母，如：53→53rd598→598th序数词前一般要用定冠词”the”，如果序数词前用“a”,“an”，则表示“再一，又一”（没有具体的范围限制）Thoughhehadfailedtwice,hewantedtotryathirdtime.Thelittlemonkeyhadhadthreeapples,andhewantedafourthone.他还想再吃一个三，数词在具体语境中的使用编号Lesson5Room608ClassTwo,GradeNineRow3Number8时间表达法9:00nineo’clock8:20eighttwentytwentypasteight9:55ninefifty-fivefivetoten11:30eleventhirtyhalfpasteleven7:45sevenforty-fiveaquartertoeight6:15sixfifteenaquarterpastsix表示“几十年代”，“几十岁”inthe1870s在十九世纪七十年代inthe1990s在二十世纪九十年代inone’sthirties在某人30多岁时inhereighties在她80多岁时“几个半”表达法1.数词＋andahalf＋名词复数2.数...