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

Unit7KnowOurWorldLesson38Ⅰ.根据汉语提示写出下列单词或短语1.行星n.______2.十亿;千兆n.______3.总计;总数n.,总的;总计的adj.____4.增大,增加v._______5.表面;表层n._______planetbilliontotalincreasesurface6.大西洋(的)n.&adj._______7.北极的adj.______8.三分之一_________9.三分之二_________10.被……覆盖_________________AtlanticArcticonethirdtwothirdsbecoveredwith...Ⅱ.根据汉语提示完成下列句子1.在2010年,世界总人口超过了七十亿。Intheyear2010,theworld’spopulationwasover7billion_______.2.到2050年,世界的人口可能达到90亿。_______,theworld’spopulationmay_____9billion.intotalBy2050reach3.这些干燥的地方被叫作沙漠。Thesedryplaces_________deserts.4.居住在那些地方是不容易的。Itis_____________inthoseplaces.arecallednoteasytolive5.为了我们的子孙后代,我们必须要善待地球。It(Theearth)______________wellforourchildrenandourchildren’schildren,too.mustbetreatedⅢ.ReadLesson38:TheWorldIsaBigPlaceandanswerthequestions1.Whichcontinentiscoveredwithsnowandiceallyearround?__________Antarctica.2.Howmanyoceansarethereintheworld?Andwhatarethey?__________________________________________________________________________________Four.TheyarethePacificOcean,theIndianOcean,theAtlanticOceanandtheArcticOcean.要点1increasev.增加;增大Step1难点·探(1)“增加到……”与“增加了……”在英语中的表达方式一样吗?(2)increase可构成什么短语?Step2语境·悟*Itisincreasingveryquickly.它(世界人口)正在快速增长。(P100)*Thecompanyhasincreasedthepriceofitscars.这个公司已经提高了它的汽车的价格。*Thepriceoftheeggshasincreasedto￥10akilo.鸡蛋的价格已经提到了一千克10元。*ThepopulationofChinahasincreasedby5percent.中国的人口增加了百分之五。Step3知识·得increase作动词,意为“增加;增大”,常见的两种搭配:(1)increase___+倍数或百分数,后面跟的倍数或百分数表示的是增幅,意为“增加了……倍或百分之……”。(2)increase__+具体的增长后的数字,后面跟的数字为增加后所到达的数量,表示“增加到了……”。bytoStep4考点·练①通货膨胀率增长了2%。Therateofinflationincreased___2%.②Travellingisagoodway__________(increase)one’sknowledgeoftheworld.bytoincrease③这个小城镇的人口已经增加到了50万。Thepopulationofthesmalltownhas___________500,000.increasedto()④(2018·连云港中考)Thetotalnumberofonlineliteraturewebsiteusershad_____to352millionbytheendofJune2017.Andthenumberisstillgrowing.A.increasedB.influencedC.includedD.introducedA要点2onethird三分之一Step1难点·探(1)在英语中,分数如何表达?(2)分数作主语时,谓语动词应当怎样选择?Step2语境·悟*Wecan’tliveinwater,andonlyaboutonethirdofourplanetisland.我们不能居住在水里,而全球只有大约三分之一是陆地。(P100)*Hehasfinishedtwothirdsofhishomework.他已经完成了他的作业的三分之二。*Threefifthsofthestudentsinmyschoolareboys.我的学校里五分之三的学生是男孩。*Thereisonethirdofthewaterleftinthebottle.瓶子里还剩下三分之一的水。Step3知识·得(1)分数的基本表达方式:分子用_______,分母用_____词;当分子大于1时,分母加_。基数词序数s(2)分数作主语时,谓语动词的选择是由其后面的名词决定的,如果名词为复数名词,则谓语动词用_____,如果名词为不可数名词,则谓语动词用_____。分数考点口诀:先子后母,子基母序;子过2,母用复;名词决定谓单复。复数单数【拓展】特殊分数表达法(1)一半的学生在这里。Onehalfofthestudentsarehere.(2)四分之三的新加坡人口是中国人。ThreequartersofthepopulationinSingaporeareChinese.Step4考点·练()(2019·安顺中考)Nowadays,_____peoplelikeHUAWEIphonesbetter,andabout_____ofthemareadults.世纪金榜导学号A.thenumberof,four-fifthsB.anumberof,four-fifthC.anumberof,four-fifthsD.thenumberof,four-fiveC要点3becoveredwith被……所覆盖Step1难点·探(1)cover有哪些词性?(2)becoveredwith是什么语态?(3)becoveredwith有没有同义短语?Step2语境·悟*Antarcticaiscoveredwithsnowandiceallyearround.南极洲常年被冰雪覆盖。(P100)*Pleasecoverthepotwiththecover.请用这个盖子盖住锅。*Doesyourbookhaveacover?你的书有书皮吗?*Theturkeyiscoveredbydeliciousgravy.这个火鸡被美味的肉汁覆盖着。Step3知识·得coverv.意为“用……覆盖”,通常用于短语cover...____...(用……覆盖……)被动语态为be___________,同义短语为becovered___n.意为“盖子”可数名词。withcoveredwithbyStep4考点·练()①Theflooriscovered_____someoldnewspaper.世纪金榜导学号A.withB.onC.forD.at()②Thewellis_____witha_____.A.cover;coverB.covered;coverC.covers;coveredD.covers;coversAB