2022-2023學(xué)年人教版英語七年級（上學(xué)期）Unit8SectionArFocus-3c課件

Unit8Whenisyourbirthday?SectionAGrammarfocus-3c

基數(shù)詞是表示個數(shù)的詞，如一個（one）、兩個（two）、三個（three）等。序數(shù)詞是表示順序的詞，如第一（first）、第二（second）、第三（third）等。什么是基數(shù)詞和序數(shù)詞？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.

基變序，有規(guī)律，詞尾加上th。123特殊記，詞尾字母t，d，d。8少t，9去e，f來把ve代替。整十變y為ie，后跟th莫遲疑。若想表示幾十幾，只變個位就可以。歌謠速記

語法重點一：特殊序數(shù)詞：onetwothreefirstsecondthird（1st）（2nd）（3rd）five

fifth（5th）twelve

twelfth（12th）eight

eighth（8th）nine

ninth（9th）特殊變化序數(shù)詞：twenty

twentieth（20th）thirty

thirtieth（30th）forty

fortieth（40th）fifty

fiftieth（50th）你能寫出sixty、seventy、eighty、ninety的序數(shù)詞嗎？整十的序數(shù)詞把y變成i再加eth：twenty-one

twenty-first(21st)forty-six

forty-sixth(46th)fifty-eight

fifty-eighth(58th)ninety-nine

ninety-ninth(99th)請你寫出15、84、43、34的序數(shù)詞。幾十幾的序數(shù)詞，十位數(shù)不變，個位數(shù)變序數(shù)詞：Whenisyourbirthday?你生日是什么時候？1.when是疑問副詞，意為“何時，什么時候”。這句話是以When開頭的特殊疑問句，主要是對時間提問。2.回答時分兩種情況：

(1)用大致的年、月、日來回答，多數(shù)是in或on構(gòu)成的介詞短語。

語法重點二：如：---Whenisyourmother'sbirthday?

---It'sonJune20th.

---Whenwassheborn?

---Shewasbornin1962.(2)用具體的時刻（鐘點）來回答。此時問句中的when相當(dāng)于whattime。如：---When(Whattime)doyougotoschooleverymorning?---Igotoschoolatseveneverymorning.---Howoldareyou?你多少歲了？---I'mfifteen.我十五歲。1.Howold開頭的特殊疑問句，是用來詢問年齡的。其同義句是What'syourage?如：Howoldisyourbrother?=What'syourbrother'sage?

語法重點三：GrammarCardinalnumbers&Ordinalnumbers數(shù)詞

基數(shù)詞

序數(shù)詞表數(shù)量表順序，常與定冠詞the連用表示數(shù)目和順序的詞叫數(shù)詞?；鶖?shù)詞的構(gòu)成①1－12，獨立成詞。

onetwothreefourfivesixseveneightnineteneleventwelve②13-19，由3－9+teen構(gòu)成。

14–fourteen16–sixteen

17–seventeen19–nineteen

特殊拼寫:

13–thirteen15–fifteen

18–eighteenReview③20－90，以-ty結(jié)尾。

20—twenty30—thirty

40—forty50—fifty

60—sixty70—seventy

80—eighty90—ninety

④21－99，兩位數(shù)，十位與個位之間“－”。

21twenty-one55fifty-five99ninety-nine⑤

101—999，三位數(shù)，百位與十位/個位之間加and。

101onehundredandone840eighthundredandforty693sixhundredandninety-three⑥

1,000以上數(shù)目，從右向左每三位用“,”

分開，分別讀為thousand,million,billion。6,500,431,729billionmillionthousandhundredandonetwothreefourfivesixseveneightninetenfirstsecondthird

fourthfifth

sixth

seventh

eighth

ninth

tenth

1st2nd3rd4th5th6th7th8th9th

10theleventwelvethirteenfourteenfifteensixteenseventeeneighteennineteentwentyeleventhtwelfth

thirteenth

fourteenth

fifteenth

sixteenth

seventeenth

eighteenth

nineteenth

twentieth11th12th13th14th15th16th17th18th19th20th基數(shù)詞CardinalNumbers序數(shù)詞OrdinalNumbersObserveandfindtherulestwenty-onetwenty-twotwenty-threethirtyfortyfiftysixtyseventyeightyninetyhundredtwenty-first

twenty-second

twenty-third

thirtieth

fortieth

fiftieth

sixtieth

seventieth

eightieth

ninetieth

hundredth

21st22nd23rd

30th40th

50th60th70th80th90th100th基數(shù)詞序數(shù)詞1.不規(guī)則類:one→first,two→second,three→third2.普通類：第四至第十九一般在基數(shù)詞后加-th，但也有四個特殊的，需加強記憶。◆fifth(第五)和twelfth(第十二)是把基數(shù)詞five和twelve后的詞尾ve變成f再加-th構(gòu)成?！鬳ighth(第八)是在基數(shù)詞eight的后面

直接加-h構(gòu)成?！鬾inth(第九)是將基數(shù)詞nine的詞尾e

去掉，再加-th構(gòu)成?；鶖?shù)詞變序數(shù)詞的方法3.“ty”類：以“-ty”結(jié)尾的整十的基數(shù)詞

變序數(shù)詞時，把基數(shù)詞的詞尾y變?yōu)閕e，再加-th，如：

twenty--twentietheighty--eightieth4.幾十幾類：表示“幾十幾”的基數(shù)詞

變序數(shù)詞時，只需將個位變?yōu)樾驍?shù)詞即

可，如：

thirty-eight--thirty-eighthtwenty-one--twenty-firstseventy-nine--seventy-ninth★序數(shù)詞前面往往加定冠詞the，但當(dāng)

序數(shù)詞前面有名詞所有格、物主代詞或指

示代詞修飾時，前面不能加the。如：

Todayismysister’sfourthbirthday.★在寫日期時常用到序數(shù)詞的縮寫形

式，即在阿拉拍數(shù)字的后面加上序數(shù)詞的

最后兩個字母。注意：基數(shù)詞變序數(shù)詞順口溜基變序，有規(guī)律，詞尾加上th。一二三特殊記(first，second，third),八加h(eighth),九減e(ninth)ve要用f替，(fivefifth；twelvetwelfth)變y為ie，(twentytwentieth，thirtythirtieth)-th最后加上去，若是第幾十幾，前為基，后為序。(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號；onJune16th在6月16號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…課時重點回顧Review.Whenisyourbirthday?It’s….Howoldareyou?I’m….Whenishisbirthday?Hisbirthdayis….Howoldishe?He’s…根據(jù)句意及首字母提示完成單詞。1.—W______isEric’sbirthday?—It’sonApril8th.2.Thet______monthoftheyearisDecember.3.S___________istheninthmonthoftheyear.4.Lindaisveryh______.Hermotherbought(買)anMP3forher.5.—Doyouwanttocometomybirthdayp____?—Yes,Ido.henwelfthappyeptemberarty1.你的生日是什么時候？

_________yourbirthday?2.我的生日是5月2日。

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

His_______is_____________17th.5.她的生日是在什么時候？

Whenis___________?WhenisWhenisbirthdayonMay2ndherbirthday完成句子：

birthdayonJanuary6.是在八月份。__________August.7.愛麗絲的生日是什么時候？

Whenis_______________?8.她的生日在九月五日。

____birthdayis______________5th.9.你爸爸的生日是什么時候？

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

____________is___________21st.HisbirthdayonAprilisyourfather’sIt’sinAlice’sBirthdayHeronSeptember讀序數(shù)詞表，然后寫出下列基數(shù)詞