2019年春八年级英语下册 Unit 7 Know Our World Lesson 38 The

Lesson38TheWorldIsaBigPlaceUnit7KnowOurWorldLesson38TheWorldIsaBigPlace课前自主预习课堂互动探究Unit7KnowOurWorld单词闯关1.行星________2.十亿；千兆________3.n．总计；总数adj.总的；总计的________4.增加；增大________→________(反义词)5.表面；表层________billionplanetLesson38TheWorldIsaBigPlace课前自主预习totalincreasedecreasesurface单词闯关6.adj.印度的n．印度人________→________(n.印度)7.Atlantic________8.Arctic________大西洋(的)IndianIndiaLesson38TheWorldIsaBigPlace北极的短语互译1.ontheearth____________2.allyearround____________3.thenumberof…____________4.总计；合计；总共____________5.被……覆盖____________6.三分之二____________在地球上.……的数量全年intotalbecoveredwith…twothirdsLesson38TheWorldIsaBigPlace句型在线1.并且截止到2050年，世界人口可能将达到90亿。And________2050,theworld'spopulation________________9billion.2.这些干旱的地方被称作沙漠。Thesedryplaces________________deserts.bymayreacharecalledLesson38TheWorldIsaBigPlace句型在线3.在那些地方生存很不容易。________________noteasy________________________thoseplaces.4.为了我们的孩子，也为了我们孩子的孩子，一定要好好地对待它！Itmust________________wellforourchildrenandforourchildren'schildren,too！ItistoliveinbetreatedLesson38TheWorldIsaBigPlace词汇点睛课堂互动探究●increasev.增加；增大[观察]Itisincreasingveryquickly.它(世界人口)正在非常迅速地增长。Readingcanincreaseyourknowledge.阅读可以增长你的知识。[探究]increase意为“增加，增大”，可用作及物动词，也可用作不及物动词。用作及物动词时，常接名词作________。宾语Lesson38TheWorldIsaBigPlace活学活用根据汉语意思完成句子人口正在非常迅速地增长。Thepopulationis________veryquickly.increasingLesson38TheWorldIsaBigPlace●1Andby2050,theworld'spopulationmayreach9billion.并且截止到2050年，世界人口可能将达到90亿。[探究](1)“by＋时间”表示“到……为止；不迟于……”。根据不同的时间，使用不同的________。(2)billion意为“十亿”，前面有________数字时，用单数形式；后面加________表示概数时，用________形式。例如：twobillion20亿billionsof数十亿句型透视时态具体of复数Lesson38TheWorldIsaBigPlace[拓展]与billion用法相同的词还有hundred(百),thousand(千),million(百万)。Lesson38TheWorldIsaBigPlace活学活用1．2017·潍坊—“FoodSafety”hasbecomeoneofthehottesttopicsrecently.—Yeah,itreceives________Internethitsaday.A．thousandsB．thousandsofC．thousandD．hundredsBLesson38TheWorldIsaBigPlace●2Wecan'tliveinwater,andonlyaboutonethirdofourplanetisland.我们不能居住在水里，而我们的星球只有三分之一的面积是陆地。[探究]onethirdofourplanet意为“我们星球的三分之一”，onethird表示分数1/3。英语中的分数用数词来表示：分子用基数词，分母用序数词。如果分子大于1，则分母用复数形式。分子和分母中间可加连词符，也可不加。表示“一半”时，常用half。例如：2/7twosevenths(two-sevenths)1/2onehalf句型透视Lesson38TheWorldIsaBigPlace[拓展]分数修饰名词作主语时，谓语动词的单复数要根据分数所修饰的名词的单复数来定。Threefourthsofthemoneyhasbeenspentonbooks.四分之三的钱用来买书了。Twothirdsofthestudentsinmyclassareboys.我们班里三分之二的学生是男孩。Lesson38TheWorldIsaBigPlace活学活用2．2017·宿迁—Mum,________ofmyclassmates________glasses.—Oh,myGod.Youneedtoprotectyoureyeswell.A．three-fourths;wearsB．three-fourth;wearC．three-fourth;wearsD．three-fourths;wearDLesson38TheWorldIsaBigPlace【解析】在英语中，分数的分子用基数词，分母用序数词；如果分子大于1，则分母用复数形式。3/4即three-fourths，排除选项B、C。此句的主语是myclassmates，谓语动词要用复数形式。句意：“妈妈，我四分之三的同学都带眼镜。”“哦，天哪。你需要好好保护好你的眼睛。”故选D。Lesson38TheWorldIsaBigPlace●3Itmustbetreatedwellforourchildrenandforourchildren'schildren,too!为了我们的孩子，也为了我们孩子的孩子，一定要好好地对待它！[探究]mustbetreated为含有情态动词的被动语态形式。含有情态动词的被动语态构成形式为“情态动词＋be＋________________”。例如：Thetreesshouldbetreatedwell.树木应该被好好地对待。句型透视动词的过去分词Lesson38TheWorldIsaBigPlace[探究]Anartschoolmaybeopenednextyear.明年可能开办一所艺术学校。Thisbookmustnotberemovedfromthelibrary.本书不得带出图书馆。Shemightbesenttoworkabroad.她可能被派往国外工作。Lesson38TheWorldIsaBigPlace活学活用3．Childrenshould________tobehonestfromayoungage.A.educateB.beeducatedC.punishD.bepunishedBLesson38TheWorldIsaBigPlace