仁爱版七年级英语上册Unit1-Topic3-SectionB完整ppt课件

.,Unit1MakingNewFriendsTopic3Howoldareyou?SectionB,.,adesk,apen,apencil,Warmingup,.,abook,abus,abox,amap,.,anapple,anorange,anegg,aneraser,.,在英语中，a,an和the称为冠词，其中a和an是不定冠词，the是定冠词。不定冠词a和an都可以表示“一(个、支、张、块)”的意思。它们在用法上有什么区别呢？请仔细观察下面的例子，然后补全结论部分所缺内容。,a和an,.,A.a“w”,an“s”,an“f”B.anegg,arulerC.aredapple,anEnglishteacherD.Isthathismap?Thisismyschoolbag.Sheisinthisroom.,.,【结论】1.从A、B组例子中可以看出，_用在以辅音音素开头的字母或单数名词之前，_用在以元音音素开头的字母或单数名词之前。2.从C组例子中可以看出,当名词前有修饰语时，应以_(名词/修饰语)开头的音素决定用a还是用an。3.从D组例子中可以看出，若名词前有物主代词his,my等或指示代词this,that等修饰限定时,_(能/不能)同时使用冠词。,an,a,修饰语,不能,.,【运用】请选用a或an完成下列句子或对话。1.Itisnt_“u”.Its_“v”.2.Isthat_egg?Yes,its_bigegg.3.WhatsthisinEnglish?Its_Englishbook.4.Its_“h”,not_“n”.,a,a,an,a,an,an,an,.,A:WhatsthisinEnglish?B:Itsapen.A:Howdoyouspellit,please?B:P-E-N,pen.,Pairwork,.,A:WhatsthisinEnglish?B:Itsabook.A:Canyouspellit,please?B:B-O-O-K,book.,.,A:WhatsthisinEnglish?B:Itsabag.A:Howdoyouspellit,please?B:B-A-G,bag.,.,-Isthisapencil?-Yes,itis.,.,A:Isthisanorange?B:No,itisnt.Itsanapple.,.,-Isthatacar?-No,itisnt.Itsabus.,.,Isthis/thata/an?Yes,itis./No,itisnt.Itsa/an,.,Completetheconversations.,A:WhatsthisinEnglish?B:_apencil-box.A:Canyouspellit,please?B:_,Its,P-E-N-C-I-L-B-O-X,pencil-box.,.,A:WhatsthatinEnglish?B:_anapple.A:_?B:A-doubleP-L-E,apple.,Its,Howdoyouspellit,.,A:Isthisaneraser?B:Yes,_.,A:Isthatapen?B:No,_.Itisapencil.,itis,itisnt,.,I.Choosetherightanswer._doyouspellit,please?A.WhatB.HowC.Where2.-Isthatacar?-No,_.A.itisntB.thatisC.thatisnt3.-Thisis_eraser.-_hereraser.A.a;ItsB.an;ItsC.an;Its,B,A,C,练习坊,.,4.Itsmyruler.(改为否定句)It_my_.5.Whatsthis_(用英语)？Its_(一支铅笔).,isnt,ruler,inEnglish,apencil,.,II.请选用a/an完成下列句子。1.Sheis_Englishgirl.2.Itis_goodapple.3.Its_“m”,not_“w”.4.Thatis_oldcar.5.Thisismymom.Sheis_teacher.,an,a,an,a,an,a,.,III.请根据所给情景用适当的词语完成下列句子或对话。1.Excuseme,isthisyourtoy?Yes,_is.2.WhatsthatinEnglish?_aruler.,it,Its