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数词定义:表示数目多少或顺序次第的词叫作数词数词包括基数词和序数词两种■基数词1至12的基数词是独立的词onetwothreefourfivesixseveneightnineteneleventwelve13至19的基数词以后缀-teen结尾thirteenfourteenfifteensixteenseventeeneighteennineteenC^20至90的整十位数的词以后缀-ty结尾twentythirtyfortyfiftysixtyseventyeightyninety几十几的基数词由十位数的词和个位数的词合成,中间加连字符eg:34thirty-four42forty-two三位数的基数词须在百位和十位(若无十位则和个位)之间力口andeg:158onehundredandfifty-eight四位数即1000以上的基数词,从后往前数,每三位加一个逗号”第一个逗号前为千thousand第二个逗号前为百万million第三个逗号前为十亿billioneg:6364285751sixbillionthreehundredandsixty-fourmilliontwohundredandeighty-fivethousandsevenhundredandfiftyone二.序数词第1到I第3:firstsecondthird第4到第19的序数词以后缀-th结尾fourthfifthsixthseventheighthninthtentheleventhtwelfththirteenthfourteenthfifteenthsixteenthseventeentheighteenthnineteenth第20到第90的十位数序数词变-y为-i再加eth:twentieththirtiethfortiethfiftiethsixtiethseventietheightiethninetieth整单位数的序数词直接加th:hundredththousandthmillionthbillionth其余的序数词的构成为基数词+序数词eg:132ndonehundredandthirty-second
三、小数表达法eg:
3.26threepointtwosix
四、分数表达法eg:1/5onefifth2/5twofifths1/5oneinfive或oneoutoffive
五、百分数表达法eg:45%forty-fivepercent
六、倍数表达法A、Ais+倍数as+adj./adv.原级many/much+n.+as+Beg:LineAisthreetimesaslongaslineB.AustraliahasfourteentimesasmanypeopleasAmerica.B、Ais+倍数+adj./adv.比较级+thanBeg:LineAistwicelongerthanlineB.C、Ais+倍数+the+相应n.height/width/length/size+of+Beg:LineAisthreetimesthelengthoflineB.D、Ais+倍数+that/those+ofBeg:TomsageistwicethatofJims.
七、编号顺序的表达eg:第1课Lessonone着重编号►theFirstLesson着重JII页序数词定义:表示数目多少或顺序次第的词叫作数词数词包括基数词和序数词两种
八、基数词A、1至12的基数词是独立的词onetwothreefourfivesixseveneightnineteneleventwelve13至19的基数词以后缀-teen结尾thirteenfourteenfifteensixteenseventeeneighteennineteen20至90的整十位数的词以后缀-ty结尾twentythirtyfortyfiftysixtyseventyeightyninety几十几的基数词由十位数的词和个位数的词合成,中间加连字符eg:34thirty-four42forty-two三位数的基数词须在百位和十位(若无十位则和个位)之间力口andeg:158onehundredandfifty-eight四位数即1000以上的基数词,从后往前数,每三位加一个逗号”第一个逗号前为千thousand第二个逗号前为百万million第三个逗号前为十亿billioneg:6364285751sixbillionthreehundredandsixty-fourmilliontwohundredandeighty-fivethousandsevenhundredandfiftyone九.序数词第1到第3:firstsecondthird第4到第19的序数词以后缀-th结尾fourthfifthsixthseventheighthninthtentheleventhtwelfththirteenthfourteenthfifteenthsixteenthseventeentheighteenthnineteenth第20到第90的十位数序数词变-y为-i再加eth:twentieththirtiethfortiethfiftiethsixtiethseventietheightiethninetieth整单位数的序数词直接加th:hundredththousandthmillionthbillionth其余的序数词的构成为基数词+序数词eg:132ndonehundredandthirty-second
十、小数表达法eg
3.26threepointtwosix-\—、分数表达法eg:1/5onefifth2/5twofifths1/5oneinfive或oneoutoffive
十二、百分数表达法eg:45%forty-fivepercent
十三、倍数表达法A、Ais+倍数as+adj./adv.^^many/much+n.+as+Beg:LineAisthreetimesaslongaslineB.AustraliahasfourteentimesasmanypeopleasAmerica.B、Ais+倍数+adj./adv.比较级+thanBeg:LineAistwicelongerthanlineB.C、Ais+倍数+the+相应n.height/width/length/size+of+Beg:LineAisthreetimesthelengthoflineB.DsAis+倍数+that/those+ofBeg:TomsageistwicethatofJims.
十四、编号顺序的表达eg:第1课Lessonone着重编号►theFirstLesson着重顺序。