Unit2语法专项课件-基数词与序数词-沪教版英语八年级上册

教学课件沪教（牛津）英语八年级上册Unit2语法专项——基数词与序数词

全解精讲+分层练习

学习目标1.掌握基数词1–1000+的拼写与读法规则。2.牢记序数词特殊变化与通用拼写规律。3.区分基数词表数量、序数词表顺序的用法。4.掌握概数与确数的用法：hundredsof/twohundred。5.熟练完成填空、单选、句型转换等题型。基数词—定义基数词表示数量、计数。回答：Howmany…?结构：描述人或事物的总数。例句：Therearefourseasonsinayear.例句：Ihavethreehundredbooks.基数词—1–121–12为独立单词，必须逐个记忆。1one2two3three4four5five6six7seven8eight9nine10ten11eleven12twelve用法：最基础计数，无规律。基数词—13–1913–19以-teen结尾。13thirteen14fourteen15fifteen16sixteen17seventeen18eighteen19nineteen注意：thirteen,fifteen拼写特殊。基数词—20–90整十20–90整十数以-ty结尾。20twenty30thirty40forty50fifty60sixty70seventy80eighty90ninety注意：forty,fifty拼写特殊。基数词—21–99几十几：十位与个位之间加连字符-。结构：整十+连字符+个位。21twenty-one36thirty-six99ninety-nine例句：Heistwenty-twoyearsold.基数词—100及以上百位与十位之间加and。结构：…hundred+and+…365threehundredandsixty-five1200onethousandtwohundred确数：前有数字，不加s。基数词—确数vs概数确数：具体数字+hundred/thousand/million不加s，不加oftwohundredpeople✔️概数：复数+of，表模糊数量hundredsof/thousandsof✔️基数词用法总结1.表数量：fivepens2.表年龄：tenyearsold3.表年份：1996nineteenninety-six4.确数不加s；概数加s加of5.大数：百位十位加and序数词—定义序数词表示顺序、排名、第几。回答：Which…?常与the连用。例句：Sundayisthefirstdayofaweek.例句：Helivesonthethirdfloor.序数词—特殊变化1one→first(1st)

2two→second(2nd)3three→third(3rd)这三个无规律，必须特殊记忆。序数词—通用规则（4–19）4–19一般加-th。特殊变化：8eight→eighth（去t）9nine→ninth（去e）5five→fifth12twelve→twelfth（ve→f）序数词—整十变化整十词：ty→tie+th20twenty→twentieth

30thirty→thirtieth40forty→fortieth50fifty→fiftieth序数词—几十几变化几十几：前基后序,只把个位变为序数词。21twenty-one→twenty-first99ninety-nine→ninety-ninth序数词—用法规则1一般情况：序数词前加thethefirstlesson/thesecondfloor/thefifthmonth例句：Januaryisthefirstmonth.序数词—用法规则2前面有物主代词（my/his/her），不加the。例:myfirsttime/herthirdbag例句：ThisismyfirstvisittoBeijing.序数词—用法规则3表示“再一、又一”：a/an+序数词asecondcakeanothertry/athirdtime

例句：CanIhaveasecondtry?序数词—用法规则4表示比赛、排名：不加thebefirstbesecond/getthirdprize例句：Heisfirstintherunningrace.基数词基础练习11.__________(5)birdsareflyinginthesky.2.Heis__________(19)yearsold.3.Thereare_______________(21)studentsinmyclass.4._________________(100)yearsisacentury.5.Thereare_________________________(365)daysinayear.6.__________________(成千上万)peoplevisitthepark.7.Thenumberis_______________________________(429).8.Hewasbornin________________________(2010).Fivenineteentwenty-oneOnehundredthreehundredandsixty-fiveThousandsoffourhundredandtwenty-ninetwothousandandten序数词基础练习

写出正确序数词1.one→_____________

2.two→_____________3.three→_____________

4.five→_____________5.twelve→_____________

6.twenty→__________7.thirty→_____________

8.twenty-one→__________9.nine→_____________

10.eight→_____________firstsecondthirdfifthtwelfthtwentieththirtiethtwenty-firstnintheighth易混点总结1确数：twohundred✔️twohundreds❌

概数：hundredsof✔️日期/楼层：用序数词

Maythethird/thesecondfloor易混点总结2the+序数词my/his+序数词（不加the）a+序数词（再一）几十几：只变个位为序数词单项选择1.Thereare__________monthsinayear.A.twelveB.twelfthC.thetwelve2.Decemberisthe__________month.A.twelveB.twelfthC.twelveth3.Pleaseturntothe__________page.A.twentyB.twentiethC.twentyth4.Thereare__________starsinthesky.A.millionsB.millionsofC.millionofABBB5.Thisismy__________timetovisitthemuseum.A.firstB.thefirstC.one6.Helivesonthe__________floor.A.threeB.thirdC.thirteen7.TheYellowRiveristhe__________longestriverinChina.A.twoB.secondC.twice8.CanIhave__________cake?A.asecondB.secondC.twoABBA句型转换1.Ihavethreebooks.（对划线提问）____________________booksdoyouhave?2.Helivesonthefourthfloor.（对划线提问）____________________doesheliveon?3.Thisismyfirsttimetobehere.（同义句）Thisisthe__________timefor__________tobehere.4.Ihavetwohundredstamps.（否定句）I__________havetwohundredstamps.HowmanyWhichfloorfirstm