初中英語數(shù)詞講解和練習(xí)基數(shù)詞序數(shù)詞略數(shù)數(shù)詞1.基數(shù)詞巧記基數(shù)詞口訣1至12分別記13至19都帶-teen13，17整十后面要用-ty40，,90幾十幾用連字符53，32百位以上and連263fifty-three,thirty-twotwohundredandsixty-two3注意：英語中沒有“萬”和“億”這兩個(gè)數(shù)量單位，要按十進(jìn)位法來推算。一萬：tenthousand十萬：one

hundredthousand百萬：onemillion千萬：一億：十億：tenmilliononehundredmilliononebillion英語數(shù)量單位one個(gè)ten十hundrend百thousand千million百萬billion十億2.序數(shù)詞基數(shù)詞→序數(shù)詞：one→firsttwo→secondthree→third大部分基數(shù)詞都在后面加th注意：five→fifthnine→ninthtwelve→twelfth注意：整十的基數(shù)詞（10除外），均將y變成ie，再加th：twenty→twentiethfifty→fiftieth表示二十以上的基數(shù)詞只變個(gè)位數(shù)（整十除外）：thirty-one→thrity-first3.略數(shù)表達(dá)法1.當(dāng)hundred，thousand，million，billion，dozen等前面有具體的數(shù)詞時(shí)，后面既不能加s，也不能加介詞of。Ourschoolboughttwothousandbooksthisyear.我們學(xué)校今年買了兩千本書大家有疑問的，可以詢問和交流可以互相討論下，但要小聲點(diǎn)2.hundred，thousand，million，billion，dozen等前面沒有具體的數(shù)詞，則在其后加s和介詞of，表不確定的數(shù)量或形容數(shù)量之多hundredsof成百的，好幾百thousandsof數(shù)以千計(jì)的millionsof數(shù)百萬的Thereisonlyhundreds

ofstudents我們學(xué)校只有幾百個(gè)學(xué)生tthree

hundredstudents三百個(gè)學(xué)生twothousandbooks兩千本書hundredsofstudents三百個(gè)學(xué)生thousandsofbooks兩千本書幾百萬個(gè)人兩百個(gè)蘋果三千個(gè)箱子幾千個(gè)杯子三百萬棵樹Thereare__________（兩千）studentsinourschool.TheGreatWallismadeof________stones.長城是由數(shù)百萬石頭砌成的twothousandmillionsof注意：若表示特定的數(shù)目，可在hundred、thousand后加ofTherearesevenhundredstudentsinthisschool.Threehundredofthemaregirls.該校有700名學(xué)生，其中女生有300名。

長樂有六百萬人，其中400萬是男性。Changlehassixmillionpeople.Fourhundredofthemaremen.4.年代表達(dá)法在20世紀(jì)90年代：inthe1990s或inthe1990’s具體年份：in+年份

in

1994把基數(shù)詞改為序數(shù)詞。onetwelvetwofourteenthreetwentyfivetwenty-oneeightforty-fournineninety-sixfirstsecondthirdfiftheighthninthtwelfthfourteenthtwentiethtwenty-firstforty-fourthninety-sixth22.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.thousandof25.Pleaselookatthefollowingfourpicturesandwritea_______storyaboutthem.A.one-hundred-wordB.one-hundred-wordsC.one-hundreds-wordD.one-hundreds-wordstwo-thousand-student兩千個(gè)學(xué)生26.—Onwhichfloordoyoulive?—The_______floor,andmyroomnumberis__.A.fifth;fivezerotwoB.fifth;fivezerosecondC.five;fivezerosecondD.five;fivezerotwo27.Inourcitypeoplehavemovedintotheirnewhouses.A.thousandB.thousandsC.thousandsofD.manythousand28.Now,turntopage_______andlookatthe_______pictureinLessonTwo.A.twentieth,oneB.twenty,oneC.twentieth,firstD.twenty,first29._____girlstoo