人教版小学三年级英语寒假专题――Be动词用法和祈使句(精)

一、学习目标:1.Be动词:am,is,are2.祈使句二、重点、难点:1.正确使用be动词am,is,are。2.明确祈使句的概念并掌握其常见的句型结构。三、考情分析:近年来,小学三年级英语试题对be动词和祈使句的考查主要集中以下两方面:1.正确使用be动词:am,is,are。2.熟练使用祈使句。四、知能提升:(一知识讲解I.Be动词1.分类:英语中be动词的一般现在式有三个,分别是:am,is,are.2.用法:am和主语I(我连用。is用于he(他,she(她,it(它和主语是单数的句子当中。are用于we(我们,you(你们,they(他们和主语是复数的句子中。例:Iamastudent.He’sapostman.Sheisn’tmyEnglishteacher.TomandIarethesameage.Whereismydress?Hereitis.Wherearemyshoes?Heretheyare.Wearebothtall.Youaretall,too.小结:be动词用法结构图:isTomItSheHenotmI'(amI⎪⎭⎪⎬⎫↓否tisn'(否areboysTheIandTomYouTheyWe⎪⎪⎪⎭⎪⎪⎪⎬⎫(否aren’tbe动词用法歌诀:Be动词,兄弟仨,am,is,还有are。我(I用am,你(you用are,is用于他(he,她(she,它(it。单数名词用is,复数名词都用are。【考题链接】1.Hello!Here_____anorangeforyou!A.amB.isC.are答案:B思路分析:主语anorange是单数形式。2.Mybooks_____veryuseful.A.amB.isC.are答案:C思路分析:主语Mybooks是复数形式。3.Ihavetwopens.They____new.One____greenandtheother_____blue.A.am,is,amB.is,are,isC.are,is,is答案:C思路分析:主语they是复数形式。One是单数形式,theother意为“另一个”,也是单数形式。II.祈使句一定义:祈使句表示请求、命令、建议等。谓语动词一律用原形。句子中通常不用主语,句末用惊叹号或句号,用降调来读。二分类:肯定的祈使句和否定的祈使句.1.肯定的祈使句a.句型:动词原形~.(省略主语Standup.起立。Bequiet,please.请安静。比较陈述句:Yousitdown.你坐下来。祈使句:Sitdown.坐下。(省略主语you注意:有时,为了加强语气,可在动词之前加do。Dositdown.务必请坐。Dostudyhard.一定要努力学习。b.用客气的语气表示祈使句时,可在句首或句尾加上please,但如果在句尾加please,那在please之前一定要加一个逗号“,”。Comethisway,please.请这边走。注意:祈使句中如果有呼唤语,一定要用逗号“,”隔开,呼唤语可出现在句首或句尾。LiMing,comehere.李明,过来。Comehere,LiMing.过来,李明。c.含有第一、第三人称主语的祈使句Let'ssaygood-byehere.我们在此道别吧。Don'tlethimdothatagain.别让他再那么做了。句型:Let+第一人称(me,us~.Let+第三人称代词(宾格:him,her,it,them或名词~.Let'sgoatonce.咱们马上动身吧。Letmetryagain.让我再试试。LetTomgotherehimself.让汤姆自己去那儿。注意:Let's包括听话者,Letus不包括听话者。用于反意疑问句时最明显。Let'sgo,shallwe?咱们去吧,怎么样?Letushelpyou,willyou?让我们帮帮你,好吗?2.否定的祈使句句型a:Don't+动词原形~Don'tswimintheriver.别在河里游泳。Don'tbelate.别迟到。Pleasedon'tbenoisy.请不要大声喧哗。注意:表示禁止时,尤其是标语等也可用“No+名词/动名词”的形式来表示。Nosmoking!禁止吸烟!Noparking!禁止停车!Nolitter!不准乱扔杂物!句型b:Let's(us,me+not+动词原形~.Don'tlet+第三人称代词的宾格或名词+动词原形.Let'snotsayanythingaboutit.对于这件事,咱们什么也不要说。Don'tletthemplaywithfire.别让他们玩火。【易错点】1.be动词的缩写形式:Iam=I'mheis=he'sitis=it'ssheis=she'syouare=you'reweare=we'retheyare=they'reisnot=isn'tarenot=aren't*amnot没有缩写形式.I'm不能用在句末。*2.祈使句的回答:回答祈使句时,应该说“OK./Allright./Great./Goodidea.”(好的,好吧,好极了决不能用“That'sOK./That'sallright.”(没关系如:—Let'sflyit.—Great!—Showmeyourruler.—Allright.【考题链接】1.________theduckyellow.A.colourB.ColourC.Colours答案:B思路分析:colour作动词时意为“给……涂色”;作名词时意为“颜色”。祈使句需以动词原形开头且首字母要大写。2.___________drawamonkey.A.LetB.LetsC.Let's答案:C思路分析:“Let's”是Letus的缩写形式。意为“让我们……”“Letus+动词原形”构成祈使句。3.—Areyouastudent?—Yes,______.A.IareB.IamC.I'm答案:B思路分析:I必须与am连用,但I'm不能用在句末。4.Everyone_____heretoday.A.amB.isC.are答案:B思路分析:主语是复合不定代词时,谓语动词用单数。5.—_____thisyourchair?—Yes,itis.A.AmB.AreC.Is答案:C思路分析:this意为“这个”,是单数。主语是单数时,谓语动词须用单数。(二即学即练Ⅰ.用“am,is,are”填空:1.This____mymouth.2.How____you?3.What______yourname?4.MrWang_____agoodteacher.5.Myshoes______verybeautiful.6._____thatyourbrother?7.Everything____OK.8.I_____tallandthin.II.连词成句。(注意大小写及标点符号1.are,how,you(?________________________2.show,me,your,pencil-box(.___________________3.at,my,train,look(.___________________4.Let,me,a,look,have(._____________________5.colour,pink,it,and,blue(.______________________下册Unit1Let'sgotoschool.L1-L2一、预习新知下节课的主要内容,包括单词:classroomschoolstorybookwaterbottle;句型:Let’sgotoschool.Nicetoseeyouagain.Look!Ihaveanew...CanIseeit?Sure.Hereyouare.二、预习点拨思考问题一:新学期开始了,见到同学们你知道该说些什么吗?思考问题二:同学们知道怎样用英语说“学校,教室,故事书和水瓶”吗?(答题时间:30分钟Ⅰ.用“am,is,are”填空:Hello!Myfriends.How___you?Now,Iwilltalkaboutmyfamilyandme.There____fourpeopleinmyfamily.They____myfather,mymother,mylittlebrotherandI.Myfather___adoctor.Mymother____ateacher.Mybrother___only3yearsold.He___lovely.(可爱的.I____10yearsoldnow.I____inClass1,Grade3.Ilovemyfamily.II.单项选择:(1.____itpinkandblue.A.LookB.ColourC.Is(2.______drawanegg.A.LetB.LetsC.Let’s(3.____somerice,please.A.haveB.HaveC.Drink(4.Here_____apearforyou.A.areB.amC.is(5.Hereyou_____.A.amB.isC.are(6.We___allheretoday.A.amB.isC.are(7._____makeanynoise.A.Don'tB.NotC.Can(8.Ilikemyhouse.It____big.A.amB.isC.are(9.—What_____this,LiYan?—____elephant.A.is,AB.are,AC.is,An(10.—Isthat____eraser?—Yes,it____.A.a,isB.an,isC.an,isn'tⅠ.用“am,is,are”填空：Hello!Myfriends.How__are_you?Now,Iwilltalkaboutmyfamilyandme.Therearefourpeopleinmyfamily.Theyaremyfather,mymother,mylittlebrotherandI.Myfatherisadoctor.Mymother_isateacher.Mybrotherisonly3yearsold.Heislovely.(可爱的.Iam10yearsoldnow.IamII.单项选择：(B1.____itpinkandblue.A.LookB.ColourC.Is(C2.______drawanegg.A.LetB.LetsC.Let’s(B3.____somerice,please.A.haveB.HaveC.Drink(C4.Here_____apearforyou.A.areB.amC.is(C5.Hereyou_____.A.amB.isC.are(C6.We___allheretoday.A.amB.isC.are(A7._____makeanynoise.A.Don'tB.NotC.Can(B8.Ilikemyhouse.It____big..A.amB.isC.are(C9.—What_____this,LiYan?—____elephant.A.is,AB.are,AC.is,An(B10.—Isthat____eraser？—Yes,it____.A.a,isB.an,isC.an,isn'tinClass1,Grade3.Ilovemyfamily.第6页