初中英语数词讲解和练习x 21页

数词英语中的数词可分为基数词和序数词两大类。基数词：人或事物的数目序数词：数目的顺序。\n基数词序数词略数年代数词\n1.基数词巧记基数词口诀1至12分别记13至19都带-teen13，17整十后面要用-ty40，,90几十几用连字符53，32百位以上and连263fifty-three,thirty-twotwohundredandsixty-two\n注意：英语中没有“万”和“亿”这两个数量单位，要按十进位法来推算。一万：tenthousand十万：onehundredthousand百万：onemillion千万：一亿：十亿：tenmilliononehundredmilliononebillion\n英语数量单位one个ten十hundrend百thousand千million百万billion十亿\n2.序数词基数词→序数词：one→firsttwo→secondthree→third大部分基数词都在后面加th注意：five→fifthnine→ninthtwelve→twelfth\n注意：整十的基数词（10除外），均将y变成ie，再加th：twenty→twentiethfifty→fiftieth表示二十以上的基数词只变个位数（整十除外）：thirty-one→thrity-first\n3.略数表达法1.当hundred，thousand，million，billion，dozen等前面有具体的数词时，后面既不能加s，也不能加介词of。Ourschoolboughttwothousandbooksthisyear.我们学校今年买了两千本书\n2.hundred，thousand，million，billion，dozen等前面没有具体的数词，则在其后加s和介词of，表不确定的数量或形容数量之多hundredsof成百的，好几百thousandsof数以千计的millionsof数百万的Thereisonlyhundredsofstudents我们学校只有几百个学生t\nthreehundredstudents三百个学生twothousandbooks两千本书hundredsofstudents三百个学生thousandsofbooks两千本书\n几百万个人两百个苹果三千个箱子几千个杯子三百万棵树\nThereare__________（两千）studentsinourschool.TheGreatWallismadeof________stones.长城是由数百万石头砌成的twothousandmillionsof\n注意：若表示特定的数目，可在hundred、thousand后加ofTherearesevenhundredstudentsinthisschool.Threehundredofthemaregirls.该校有700名学生，其中女生有300名。长乐有六百万人，其中400万是男性。Changlehassixmillionpeople.Fourhundredofthemaremen.\n4.年代表达法在20世纪90年代：inthe1990s或inthe1990’s具体年份：in+年份in1994\n把基数词改为序数词。onetwelvetwofourteenthreetwentyfivetwenty-oneeightforty-fournineninety-sixfirstsecondthirdfiftheighthninthtwelfthfourteenthtwentiethtwenty-firstforty-fourthninety-sixth\n22.Januaryis_______monthoftheyear.A.oneB.theoneC.firstD.thefirst23.Thereare_______daysinayear.A.threehundredssixty-fiveB.threehundredandsixty-fiveC.thethirdhundredsixty-fiveD.thirdhundredandsixty-five24.Thecomputerwascheap.Ispentonlytwo_______yuanonit.A.thousandsB.thousandC.thousandsofD.thousandof\n25.Pleaselookatthefollowingfourpicturesandwritea_______storyaboutthem.A.one-hundred-wordB.one-hundred-wordsC.one-hundreds-wordD.one-hundreds-wordstwo-thousand-student两千个学生\n26.—Onwhichfloordoyoulive?—The_______floor,andmyroomnumberis__.A.fifth;fivezerotwoB.fifth;fivezerosecondC.five;fivezerosecondD.five;fivezerotwo27.Inourcitypeoplehavemovedintotheirnewhouses.A.thousandB.thousandsC.thousandsofD.manythousand\n28.Now,turntopage_______andlookatthe_______pictureinLessonTwo.A.twentieth,oneB.twenty,oneC.twentieth,firstD.twenty,first29._____girlstookpartintheSuperGirlCompetitionbutonlyfewofthemsucceeded.A.OnemillionofB.ThousandsandmillionsC.MillionsofD.Twomillions\nPPT制作：小鱼图片版权：伊面\n无垠文海邀你畅享docer.wps.cn更改PPT母版功能键：