2022-2023学年人教版英语七年级（上学期）Unit8SectionArFocus-3c课件

Unit8Whenisyourbirthday?SectionAGrammarfocus-3c

基数词是表示个数的词，如一个（one）、两个（two）、三个（three）等。序数词是表示顺序的词，如第一（first）、第二（second）、第三（third）等。什么是基数词和序数词？first

1stsecond2ndthird3rdfourth4thfifth5thsixth6thseventh7theighth8thninth9thtenth10theleventh11thtwelfth12ththirteenth13thfourteenth14thfifteenth15thsixteenth16thseventeenth17theighteenth18thnineteenth19thtwentieth20thtwenty-first(21st)twenty-second(22nd)twenty-third(23rd)twenty-fourth(24th)twenty-fifth(25th)twenty-sixth(26th)twenty-seventh(27th)twenty-eighth(28th)twenty-ninth(29th)thirtieth(30th)thirty-first(31st)Findouttherules.

基变序，有规律，词尾加上th。123特殊记，词尾字母t，d，d。8少t，9去e，f来把ve代替。整十变y为ie，后跟th莫迟疑。若想表示几十几，只变个位就可以。歌谣速记

语法重点一：特殊序数词：onetwothreefirstsecondthird（1st）（2nd）（3rd）five

fifth（5th）twelve

twelfth（12th）eight

eighth（8th）nine

ninth（9th）特殊变化序数词：twenty

twentieth（20th）thirty

thirtieth（30th）forty

fortieth（40th）fifty

fiftieth（50th）你能写出sixty、seventy、eighty、ninety的序数词吗？整十的序数词把y变成i再加eth：twenty-one

twenty-first(21st)forty-six

forty-sixth(46th)fifty-eight

fifty-eighth(58th)ninety-nine

ninety-ninth(99th)请你写出15、84、43、34的序数词。几十几的序数词，十位数不变，个位数变序数词：Whenisyourbirthday?你生日是什么时候？1.when是疑问副词，意为“何时，什么时候”。这句话是以When开头的特殊疑问句，主要是对时间提问。2.回答时分两种情况：

(1)用大致的年、月、日来回答，多数是in或on构成的介词短语。

语法重点二：如：---Whenisyourmother'sbirthday?

---It'sonJune20th.

---Whenwassheborn?

---Shewasbornin1962.(2)用具体的时刻（钟点）来回答。此时问句中的when相当于whattime。如：---When(Whattime)doyougotoschooleverymorning?---Igotoschoolatseveneverymorning.---Howoldareyou?你多少岁了？---I'mfifteen.我十五岁。1.Howold开头的特殊疑问句，是用来询问年龄的。其同义句是What'syourage?如：Howoldisyourbrother?=What'syourbrother'sage?

语法重点三：GrammarCardinalnumbers&Ordinalnumbers数词

基数词

序数词表数量表顺序，常与定冠词the连用表示数目和顺序的词叫数词。基数词的构成①1－12，独立成词。

onetwothreefourfivesixseveneightnineteneleventwelve②13-19，由3－9+teen构成。

14–fourteen16–sixteen

17–seventeen19–nineteen

特殊拼写:

13–thirteen15–fifteen

18–eighteenReview③20－90，以-ty结尾。

20—twenty30—thirty

40—forty50—fifty

60—sixty70—seventy

80—eighty90—ninety

④21－99，两位数，十位与个位之间“－”。

21twenty-one55fifty-five99ninety-nine⑤

101—999，三位数，百位与十位/个位之间加and。

101onehundredandone840eighthundredandforty693sixhundredandninety-three⑥

1,000以上数目，从右向左每三位用“,”

分开，分别读为thousand,million,billion。6,500,431,729billionmillionthousandhundredandonetwothreefourfivesixseveneightninetenfirstsecondthird

fourthfifth

sixth

seventh

eighth

ninth

tenth

1st2nd3rd4th5th6th7th8th9th

10theleventwelvethirteenfourteenfifteensixteenseventeeneighteennineteentwentyeleventhtwelfth

thirteenth

fourteenth

fifteenth

sixteenth

seventeenth

eighteenth

nineteenth

twentieth11th12th13th14th15th16th17th18th19th20th基数词CardinalNumbers序数词OrdinalNumbersObserveandfindtherulestwenty-onetwenty-twotwenty-threethirtyfortyfiftysixtyseventyeightyninetyhundredtwenty-first

twenty-second

twenty-third

thirtieth

fortieth

fiftieth

sixtieth

seventieth

eightieth

ninetieth

hundredth

21st22nd23rd

30th40th

50th60th70th80th90th100th基数词序数词1.不规则类:one→first,two→second,three→third2.普通类：第四至第十九一般在基数词后加-th，但也有四个特殊的，需加强记忆。◆fifth(第五)和twelfth(第十二)是把基数词five和twelve后的词尾ve变成f再加-th构成。◆eighth(第八)是在基数词eight的后面

直接加-h构成。◆ninth(第九)是将基数词nine的词尾e

去掉，再加-th构成。基数词变序数词的方法3.“ty”类：以“-ty”结尾的整十的基数词

变序数词时，把基数词的词尾y变为ie，再加-th，如：

twenty--twentietheighty--eightieth4.几十几类：表示“几十几”的基数词

变序数词时，只需将个位变为序数词即

可，如：

thirty-eight--thirty-eighthtwenty-one--twenty-firstseventy-nine--seventy-ninth★序数词前面往往加定冠词the，但当

序数词前面有名词所有格、物主代词或指

示代词修饰时，前面不能加the。如：

Todayismysister’sfourthbirthday.★在写日期时常用到序数词的缩写形

式，即在阿拉拍数字的后面加上序数词的

最后两个字母。注意：基数词变序数词顺口溜基变序，有规律，词尾加上th。一二三特殊记(first，second，third),八加h(eighth),九减e(ninth)ve要用f替，(fivefifth；twelvetwelfth)变y为ie，(twentytwentieth，thirtythirtieth)-th最后加上去，若是第几十几，前为基，后为序。(twenty-onetwenty-first;twenty-fourtwenty-fourth)Matchthequestionsandanswers.3aQuestionsAnswers1.WhenisJenny’sbirthday?___a.No,it’sonthe6th.2.Whenaretheirbirthdays?___b.HerbirthdayisonMay24th.3.Whenisyourbrother’sbirthday?___c.Yes,itis.4.IshisbirthdayinJuly?___d.TheirbirthdaysareinJanuary.5.IsyourbirthdayonFebruary1st?____e.It’sonJune16th.bdecaAttention(注意）:InJanuary在1月inJuly在7月onthe6th在6号；onJune16th在6月16号A:_______isyourbirthday?B:________________March21st.A:___________________B:I’mfifteen.LookandsayNAME:JohnMillerDATEOFBIRTH:March21stAGE:15WhenMybirthday

isonHowold

areyou?January1stA:Whenishisbirthday?B:Hisbirthdayis…38yearsoldA:Howoldishe?B:Heis…May24thA:Whenisherbirthday?B:Herbirthdayis……A:Howoldisshe?B:Sheis…A:How______areyou,Grace?B:_________twelve.A:And_____isyourbirthday?B:My________isonMarch12th.HowaboutyouandTom?A:Well,mybirthdayis_____July5th,andTom’sbirthdayis_____December.Completetheconversation.3boldI’mwhenbirthdayonin3cFindoutyourgroupmembers’birthdaysandages.Lineupfromtheyoungesttotheoldest.Giveareportlikethis:Therearefivestudentsinmygroup.Jennyistheyoungest.Herbirthdayis…Andthen…课时重点回顾Review.Whenisyourbirthday?It’s….Howoldareyou?I’m….Whenishisbirthday?Hisbirthdayis….Howoldishe?He’s…根据句意及首字母提示完成单词。1.—W______isEric’sbirthday?—It’sonApril8th.2.Thet______monthoftheyearisDecember.3.S___________istheninthmonthoftheyear.4.Lindaisveryh______.Hermotherbought(买)anMP3forher.5.—Doyouwanttocometomybirthdayp____?—Yes,Ido.henwelfthappyeptemberarty1.你的生日是什么时候？

_________yourbirthday?2.我的生日是5月2日。

Mybirthdayis___________.3.他的生日是什么时候?_________his________?4.他的生日是在1月17日。

His_______is_____________17th.5.她的生日是在什么时候？

Whenis___________?WhenisWhenisbirthdayonMay2ndherbirthday完成句子：

birthdayonJanuary6.是在八月份。__________August.7.爱丽丝的生日是什么时候？

Whenis_______________?8.她的生日在九月五日。

____birthdayis______________5th.9.你爸爸的生日是什么时候？

When__________________birthday?10.他的生日是在4月21日。

____________is___________21st.HisbirthdayonAprilisyourfather’sIt’sinAlice’sBirthdayHeronSeptember读序数词表，然后写出下列基数词