ExploringtheTopic:GrammarinUse(Numbers&Imperativesentences)Unit8OurBluePlanet

結(jié)合圖片和文字描述，在語境中理解并學(xué)會(huì)如何使用基數(shù)詞來表達(dá)數(shù)量；2.結(jié)合語境運(yùn)用所學(xué)語法知識(shí)，掌握祈使句的形式、意義和用法；3.通過人與自然相關(guān)話題討論，了解節(jié)約水的重要性，樹立水資源保護(hù)意識(shí)，養(yǎng)成節(jié)約用水的習(xí)慣。Canyourememberthesepictures?Thinkingaboutwhatwecandotosavewater.e.g.Turnoffthetapwhilebrushingyourteeth...Reusewater...NumbersLookatthepicturesandreadthesentences.Payattentiontothenumbers.Activity1TheQinghaiLakecoversabout4,600squarekilometers.ThecoastlineoftheArcticOceanisabout45,390kilometerslong.TheChangjiangRiverisabout6,300kilometerslong.TheAtlanticOceancoversmorethan93,000,000squarekilometers.Weuseacommaevery3digitsfromtherightwhenthenumberisgreaterthan999.TIPSNumbers詞匯、短語積累cover覆蓋ThecoastlineoftheArcticOcean北冰洋海岸線TheChangjiangRiver長(zhǎng)江TheAtlanticOcean大西洋Numbers基數(shù)詞！是什么樣的詞呢？？概念：基數(shù)詞是表示數(shù)量多少的詞，用來描述可數(shù)名詞的數(shù)量。比如“one(1)、two(2)、three（3）......hundred（百）、thousand（千）、million（百萬）、billion（十億）”等，主要用于計(jì)數(shù)。數(shù)字大于等于2時(shí)，后面的名詞需要變復(fù)數(shù)。e.g.我有三個(gè)蘋果。

Ihavethreeapples.

桌子上有五本書。Therearefivebooksonthedesk.Numbers（1）0-12千位以內(nèi)的基數(shù)詞構(gòu)成（2）13-190123456zeroonetwothreefourfivesix789101112seveneightnineteneleventwelve13141516171819thirteenfourteenfifteensixteenseventeeneighteennineteenNumbers千位以內(nèi)的基數(shù)詞構(gòu)成（4）21-99（非整十：十位數(shù)和個(gè)位數(shù)之間加連字符“-”）（3）20-90（整十?dāng)?shù)，以ty結(jié)尾）2030405060708090twentythirtyfortyfiftysixtyseventyeightyninetye.g.21twenty-one;49forty-nine54fifty-four（5）101-999(百位數(shù)和十位數(shù)之間加“and”)e.g.123onehundredandtwenty-three456fourhundredandfifty-sixNumbers千位以內(nèi)的基數(shù)詞的構(gòu)成規(guī)律總結(jié):英語基數(shù)詞的構(gòu)成有一定的規(guī)律。1

到

12

是獨(dú)立的單詞，13

到19

一般是在個(gè)位數(shù)詞的詞尾加

-teen

構(gòu)成，20

到

90

整十位數(shù)通常是在個(gè)位數(shù)詞的詞尾加

-ty構(gòu)成，兩位數(shù)的表示方法是整十位數(shù)和個(gè)位數(shù)之間用連字符

“-”

連接，三位數(shù)的表示方法是在百位和十位（若無十位則和個(gè)位）之間用

“and”

連接。你能發(fā)現(xiàn)哪些千位以內(nèi)的基數(shù)詞的構(gòu)成規(guī)律嗎？Numbers

拓展：整百的基數(shù)詞構(gòu)成注意：hundred，thousand，million,billion在合成數(shù)詞中一般用單數(shù)形式，但是用來表示不確定的數(shù)目時(shí)，用作復(fù)數(shù)形式且和介詞of連用。固定搭配：具體數(shù)字＋hundred/thousand/million/billion+可數(shù)名詞復(fù)數(shù)“...百/千/百萬/十億”hundreds/thousands/millions/billions＋可數(shù)名詞復(fù)數(shù)“數(shù)百.../數(shù)千.../數(shù)百萬.../數(shù)十億...”

百、千、百萬、十億1001,0001,000,0001,000,000,000百千百萬十億選擇題。()1.“Twohundredandthirty”isequaltothenumber______.A.203B.230C.320(

)2.Thereare______daysinayear.Usuallyit’s365,butinaleapyearit’s366.A.threehundredsandsixty-fiveB.threehundredandsixty-fiveC.threehundredandsixtyfive()3.Whichofthefollowingiscorrect?A.789isreadas“sevenhundredsandeighty-nine”B.123isreadas“onehundredandtwenty-three”C.605isreadas“sixhundredfifty”NumbersBBB你答對(duì)了嗎？填空題。

1._____________（Hundred/Hundreds）ofpeopleattendedthismeeting.2.Thereareaboutthree____________(hundred/hundreds)studentsinourschool.3.Thecompanymadetwo__________(billion/billions)dollarsinprofit(收益）lastyear.4.___________(Billion)ofbacteria（細(xì)菌）existinourbody.5.Theprojectwillcostaboutten_________(million/millions)yuan.NumbersHundredshundredbillionBillionsmillionNumbers千位以上英文數(shù)字的讀法

千位以上英文數(shù)字的讀法通常遵循一定的規(guī)則,即每三位數(shù)為一個(gè)單位,用逗號(hào)隔開,從右往左依次是

thousand(千)、million(百萬)、billion(十億)。e.g.3,500:讀作“threethousand,fivehundred”12,345:讀作“twelvethousand,threehundredandforty-five2,345,600:讀作“twomillion,threehundredandforty-fivethousand,sixhundred”12,345,678,900:

讀作“twelvebillion,threehundredandforty-fivemillion,sixhundredandseventy-eightthousand,ninehundred”NumbersReadthenumbersandcompletethetable.Activity24,186fourthousand,onehundredandeighty-six45,390forty-five__________,three__________andninety6,363,000sixmillion,threehundredandsixty-threethousand1,386,000,000onebillion,threehundredandeighty-six__________909,090,009,900ninehundredandnine__________,ninety__________,nine__________,ninehundredbillionmillionhundredmillionthousandthousand選擇題。()1.Theyhavesold______computersthismonth.A.onethousandandfiftyB.onethousandfiftyC.onethousandsandfiftyD.onethousandsfifty(

)2.—Canyouread48,162?—Sure.It’s________.A.forty-eightthousand,onehundredsixty-twoB.forty-eightthousand,onehundredandsixty-twoC.forty-eightthousandandonehundredandsixty-twoNumbersAB你答對(duì)了嗎？Completethesentenceswiththenumbersinthebrackets.NumbersActivity31.Antarcticaisabout____________________________________________(14,200,000)squarekilometersinsize,andicecoversabout98percentoftheland.2.TheSeaofMarmaraisabout____________________________________(11,350)squarekilometers.3.Oceanscoverabout____________________________________________(360,000,000)squarekilometersoftheearth.4.Thereareabout___________________________(307,000,000)lakesintheworld.fourteenmillionandtwohundredthoudsandthreehundredandsixtymillioneleventhousand,threehundredandfiftythreehundredandsevenmillionImperativesentencesPairwork.Readtheconversation.Payattentiontotheimperativesentences.Comein,please.MissWang,hereistheposteraboutsavingtheocean.CanIputitonthistable?Oh,don’tputithere.Pleaseputitonthatbigchair.Activity1(XiaoYais

knockingonthedoor.)puton

穿上；上映

putup張貼

putoff延誤，推遲

putdown

放下，記下Imperativesentences祈使句定義：一般以動(dòng)詞原形開頭，無時(shí)態(tài)和數(shù)的變化，沒有主語，用來表示命令、建議、請(qǐng)求、禁止、警告、勸告等的句子。類型：(1)肯定祈使句。

e.g.Listentome.聽我說。(2)否定祈使句。

e.g.Don’ttalkloudly.不要大聲講話。Imperativesentences肯定（Positive）祈使句

肯定祈使句的句式結(jié)構(gòu)：（1）動(dòng)詞原形+其他。

e.g.Comehere.

過來。（2）Let+賓語+動(dòng)詞原形+其他。

e.g.Letmeplaythepiano.

讓我彈一下鋼琴。（3）Be+表語+其他。

e.g.Bequiet.安靜。Imperativesentences否定（Negative）祈使句

否定祈使句的句式結(jié)構(gòu)：（1）Don’t+肯定祈使句。

e.g.Don’tplaywithfire.不要玩火。（2）Let+賓語+not+動(dòng)詞原形。

e.g.Lethimnotstandintherain.不要讓他站在雨中。（3）Never+動(dòng)詞原形。

e.g.Nevercomelate.永遠(yuǎn)不要遲到。（4）No+(動(dòng))名詞。

e.g.Nosmoking.不要吸煙。選擇題。()1.Let’s______basketballafterschool.A.playB.toplayC.playingD.plays(

)2.______methetruth,orI’llbeangry.A.TellingB.TotellC.TellD.Told()3.______lateforschoolagain,Tom.A.NotbeB.Don’tbeC.BenotD.Aren’t()4.Please______thewindowbeforeyouleavetheclassroom.A.closingB.tocloseC.closeD.closedAB你答對(duì)了嗎？ImperativesentencesCCCompletethetableandlearnhowtouseimperativesentencesActivity24,186PositiveNegative______everydropofwater.Don’t_______wasteintothelake.______enoughwater._______wastewater.Savewater,saveourplanet!No_________inthatlake.______yourstep!Theflooriswet.Never________thewaterrunning.Let’s______aposteraboutsavingwater.Let’snot________here!Don’tImperativesentencesSaveDrinkMindmakethrowswimmingkeepspeakMatchthepictureswiththewordsorphrases,andthenmakeimperativesentences.takeashowerActivity3Imperativesentenceslitterswimfis