九年级英语Unit9 第三课时市公开课一等奖省名师优质课赛课一等奖课件

Unit9Whenwasitinvented?SectionB1a---2calarmclockIt’sabattery-operatedmachine.GuessinggameSometimesit’sreallyannoyingifpeoplewanttogoonsleeping.Itwakespeopleupeverymorning.---Whatisthealarmclockusedfor?---Itisusedfor________________.wakingpeopleup---Whatdoyouthinkofit?---Ithinkit’s____________________.annoyingifIwanttogoonsleepinghelpfulorIwillgetuplateIt’sanelectricmachinethatlookslikeabox.GuessinggameIt’susedforcookingfood.It’salsousedtoheatthecoldfoodinafewminutes.---Whatisthemicrowaveovenusedfor?---Itisusedfor________________.cookingfood---Whatdoyouthinkofit?---Ithinkit’s____________________.heatingthecoldhelpfulbeauseitmakesmylifeeasierandquickermicrowaveovenTheyaremadeofglass.GuessinggameTheyareusedforseeinginthedark.Theygivepeoplemoretimetoworkorplayeveryday.---Whatarethelightbulbsusedfor?---theyareusedfor________________.seeinginthedark---Whatdoyouthinkofit?---Ithinkit’s____________________.helpfulbecauseitgivespeoplemoretimetoworkorplayeverydaylightbulbsBecauseofsomegreatinventions,ourlifebecomesmucheasierandmorecomfortable.ConclusionSomeoftheinventionsarereallyhelpful,however,somearekindofannoying.HelpfulinventionsAnnoyinginventionsExample____________1.___________________2.___________________3.___________________4.___________________5.___________________Example____________1.__________________2.__________________3.__________________4.__________________5.__________________telephonealarmclockplanecomputerlightbulbmicrowaveoventelevisionatomicbombmissile导弹gun枪支chemicalweaponsplasticbagsMakealistoffivehelpfulinventionsandfiveannoyinginventions.3a化学武器原子弹A:Whatdoyouthinkis

themosthelpfulinvention?B:Ithinkthemosthelpfulinventionisthelightbulb.A:Whyisthat?B:Well,itgivespeoplemoretimetoworkandplayeveryday.PairworkA:Whatdoyouthinkis

…?B:Ithink…is….A:Whyisthat?B:Well,…1.I

open

thedoor.Thedoor

is

opened

by

me.2.Heoftenhelps

homelesspeople.Homelesspeople

areoftenhelped

by

him.3.I

handedout

somepapersjustnow.Somepapers

werehandedout

by

mejustnow.主动语态:主语是动作执行者。被动语态:主语是动作承受者。被动语态结构为：(主动语态)(主动语态)(主动语态)(被动语态)(被动)(被动语态)be+过去分词将以下句子变为被动语态。Revision:WritingA:Look!Thislookssointeresting!B:Ah,it’sagreatinventionofChina.A:Really?When______it_________?B:Ithinkit_______________inHanDynasty.A:What______it______for?B:Guess!A:______it______forholdingwater?B:No.It________fortestingearthquakes（地震）.A:Wow,it’sreallyamazing!wasinventedwasinventedwasusedWasusedwasused(汉朝)将以下句子改为被动语态1.Peopleusemetalformakingmachines.Metal

formakingmachines.2.Wedon`tuserecordersinmathclass.Recorders

by

inmathclass.3.Dotheyuseitasatable?

it

asatableby

?4.Shegrowsflowersonafarm.Flowers

afarm.5.DotheyteachJapaneseintheirschool?

Japanese

intheirschool?isusedaren’tusedusIsusedthemaregrownonIstaughtEXERCISESIt’sanelectricmachinethatlookslikeabox.GuessinggameIt’susedforstoring(存放)food.It’susedforkeepingthefoodfresh.---Whatisthefridgeusedfor?---Itisusedfor________________.storingfoodkeepingthefoodfreshfridgeWhatfoodcanbeputinthefridge?Listthenamesofthefoodasmanyaspossible.BrainstormThefridgeisahelpfulinventionthatkeepsthefoodfresh.Ifthere’snofridge,the__________ofthefoodwillgobadeasily,andthefoodwill________terrible.tastestasteWhattastesdoyouknow?Listthedifferenttastesasmanyaspossible.Brainstormsweetsoursaltycrispybitterhot酸，酸味咸，含盐脆，易碎苦，苦味辣，辣味甜，甜味thetastesoffoods-Howdoes…taste?-Ittastes…thetastesoffoods-Howdoes…taste?-Ittastes…

thetastesoffoods-Howdoes…taste?-Ittastes…bittergourdthetastesoffoods-Howdo…taste?-Theytaste…biscuitssaltyhotcrispysoursweetbittersweetHowdoesthe…taste?/Howdothe…taste?Ittastes…./Theytaste….sweeteolmnappleorangecakehoneycandy…Frenchfriesbiscuitpopcornspotatochips…pizzapotatochipssaltedfishsaltedmeatFrenchfries…grapeorangeyogurt…Whatfoodtastessweet

/crispy/salty/sour?

The…tastessour.The…s

tastesweet.SelfCheckFillineachblankwiththecorrectwordgiven.crispysweetsaltysour1.Idon’tlikeeatingchocolate.Thetasteistoo

.2.Momaddedsaltbutitstillwasn’t

enough.3.Ipreferlemonstooranges.Ilikethe

taste.4.Shelikes

cookies.Theyarehard,dryandeasilybroken.sweetsaltysourcrispyWhat’syourfavoritefood?Howtomakepotatochips?thinsaltySprinklesome

saltonthemcutthemupinpiecescrispycookthemforalongtimethickTheHistoryoffoods饼干起源于19世纪30年代英国。大约在1831年，一艘英国帆船航行在法国附近，经比斯开湾（Biscay）时，遇飓风攻击，船员们逃到邻近荒岛。风停后，船员回到船上寻找食物，把船舱内被海水泡湿了面粉、砂糖、奶油等带回了荒岛。为了充饥，船员们将这几样东西混合在一起，捏成一个个薄薄小饼，放在石板上烤熟，竟然味道不错。

这些船员遇救回国后，为纪念这次历险，就用一样方法烤制了许多小饼分给纪念活动人们吃。并命名为“比斯开小饼”（Biscuit）。这便是今天流行于全世界饼干来历。TheHistoryofBiscuitsThebiscuitswereinventedbyaccident!

Sandwich原来是英国东南部一个不知名小镇，镇上有一位名叫JohnMontagu伯爵，他整天沉溺于纸牌游戏中，已经到了废寝忘食地步。仆人极难侍候他饮食，便将一些菜肴、鸡蛋和腊肠夹在两片面包之间，让他边玩牌边吃饭。没想到John见了这种食品大喜，并随口就把它称作“sandwich”，以后饿了就喊：“拿sandwich来!”其它赌徒也争相仿效，玩牌时都吃起sandwich来。很快，sandwich就传遍了英伦三岛，并传到了欧洲大陆，以后又传到了美国。sandwich已成为当今西方主要快餐食品之一。

TheHistoryofSandwichesThesandwicheswereinventedbyaccident!TheHistoryofPotatochipsGeorgeCrumchefDoyouknowthehistoryofthepotatochips?cook2a.Listenandcircle“T”(fortrue)or“F”(forfalse).Potatochipswereinventedbymistake.Theywereinventedin1863.Thecustomerthoughtthepotatoesweren’tthinenough.Thecustomersaidtheyweren’tsaltyenough.Georgewantedtomakethecustomerhappy.Thecustomerwashappyintheend.TFTFTFTFTFTF2b:Thehistoryofchipsthatpotatochipswereinventedbymistake?Potatochips____________byachefcalledGeorgeCrum.Theywereinventedin__________.GeorgeCrumcookedthemforalongtimeuntilthey____________.Andhesprinkledlotsofsaltonthemsotheywere__________.

Didyouknowwereinvented1853werecrispyreallysaltyBoy1:Hey,didyouknowthatpotatochipswereinventedbymistake?Boy2:Really?Whatdoyoumean?Boy1:Well,hereonthebagitsaysthattheywereinventedbyachefcalledGeorgeCrum.Boy2:Whenwasthat?Boy1:Oh,itwasbackin1853.Boy2:So,whywasitanaccident?Boy1:well,onedayacustomerintherestaurantwhereGeorgeworkedsentbackhisplateoffriedpotatoesbecausehesaidtheywerecuttoothick.Boy2:Sowhathappened?2a,2bHowwerepotatochipsinvented?Boy1:Well,Georgewasinabadmood,sohecutthepotatoesreally,reallythin,andhecookedthemforalongtimeuntilltheywerecrispy.Andhesprinkledlotsofsaltonthemsotheywerereallysalty.Hethoughtthecustomerwouldhatethem.Boy2:And?Boy1:Andthecustomerlovedthemandaskedformore.Hetoldtheothercustomersaboutthem,andsooneveryonewasorderingthinly-sliced,crispy,saltypotatochips.Boy2:Andwearestilleatingthemtoday.Whatacoolstory!Boy1:Yeah.Thehistoryofpotatochips

Whoweretheyinventedby?

Whenweretheyinvented?

Howweretheyinvented?

Haveyouknownthehistoryofpotatochips?GeorgeCrumin1853acustomer--sentbackaplateoffriedpotatoes--theywerecuttoothick.GeorgeCrum--wasinabadmood--cutthepotatoesthin--cookedforalongtime--sprinkledsaltonthem--wouldhatehimacustomer--lovedthem,askedformoretomakethemreallysalty--bymistakeA:Didyouknowpotatochipswereinventedbymistake?B:Wow,Ididn’tknowthat.Whoinventedthem?A:…Junkfoodisn’tgoodforourhealth,althoughittastesgood.Trytoeatlessthiskindoffood,oryouwillgetfatter.Iwanttoinventakindoffood.Itisas______assugar.Itisasc_______aspotatochips.Itisalittle_______likelemons.ButIwon’t_______toomuchsaltonit.Idon’twantittobetoo_____.IthinkonedayImayinventitbym________.sweetrispysoursprinklesaltyistakeHaveatry:ifIwereachefInventakindoffoodthatisnotonlydeliciousbutalsohealthy.myselfLanguagepointsThepotatochipswereinventedby

mistake.薯片是无意中被创造。

1.mistake做名词,意为“弄错,误解”你犯了一个很大错误。

Youhavemadeabigmistake.

2.mistake作动词,意为“弄错,误解”她讲不清楚,所以我误解了她话。

Shedidn’tspeakveryclearlysoImistookwhatshesaid.

3.

bymistake

意为“错误地,无意地”他错把盐放进她茶里。

Heputsaltinhercupofteabymistake.

我错拿了他