Unit7讲义译林版英语八年级上册

Unit7Thenaturalworldecosystem：n.生态系统。如：Theforestecosystemisvery（.；n.thegroundinwinter.（）.量），producer（生产者）。如：Plantscanproduceoxygen.（植物..做某事）。如：Weshouldpreventtheriverfrombeingpolluted.（我quic（；month（monthly（每月的）oceancoversaround71%oftheearth'ssurface.（westayedathome.（）It's；You兴趣，如雨林、珊瑚礁、草原和极地冰盖等生态系统的特点。“心脏”“肾脏”，森林是地球的“肺”。措施，还要求学生就保护生态系统写一份提案。Forestshelptokeepthebofnature.（答案：balance）用所给词的适当形式填空Weshouldspeaktoothers 描述生态系统句子的转换：对描述生态系统特征、作用的句子进行同义句转换heoansethehartfthearth（改为同义句）→Theoceanissimilartothe"heart"ofthe连接词相关句型转换：对含有and、but、or、so的句子进行转换，如合并句Helikesreading.Helikeswriting.（and合并句子）→Helikesreadingand临的问题等细节的理解。意义等。“ProtectingEcosystemName]”为题，要求学生运用所学词汇和句型，描述一种生态系统的重要性、面临的问题以及保护措施。理解语境单词时，注意单词的正确形式，如名词的单复数、动词的时态等。转换时，注意句子成分的调整。连接词；改变连接词时，要确保句子逻辑合理。的同义替换。和文章主旨得出结论。构思框架：按照“生态系统介绍重要性阐述面临问题分析保护措施提出呼吁行动”的结构进行写作。和结果的句型等，增加文章的逻辑性和丰富度。The includesallthelivingandnonlivingthingsinanTheocean about71%oftheearth'sPlantsinwetlandscan theWeshouldkeepthe ofWeshouldtakeactionto theWetlandscanhelp Theairintheforestisveryfreshbecauseplantscan The betweendayandnightinthedesertisveryWeshould wastetoprotecttheThegovernmenthasmadelawstostoppeoplefrom wild1.ecosystem2.covers3.protect4.balance5.protect6.prevent7.producedifference9.reduce10.Weshouldspeaktotheold The (friend)peopleinthevillagemadeusfeelatTheriveris (pollute)seriously.WemustdosomethingtocleanIt's (danger)toswimintheriverWecanseemany (kind)ofanimalsintheThe (leaf)onthetreeturnyellowinWeshouldtake (act)toprotectthewildThelittleboyis (interest)inplayingThe (tour)fromallovertheworldetovisittheGreatIt'simportant (save)答案：1.politely2.friendly3.polluted4.dangerous5.kinds6.leaves7.action8.tourists10.toTheoceanislikethe"heart"oftheearth.（改为同义句）Theoceanis the"heart"oftheearth.Helikesreading.Helikeswriting.（and合并句子Helikesreading Weshouldplantmoretreestoprotecttheenvironment.（对划线部分提问 shouldweplantmoreThedesertishotanddry.（改为否定句）Thedesert hot Wetlandscanhelppreventfloods.（改为一般疑问句 wetlands helpprevent答案：1.similarto2.and3.Why4.isn'tor5.CanA、B、C、DTherainforestisanamazingplacefulloflife.Itishometomillionsofplantsandanimals.Thetalltreesintherainforestformathickcanopy（树冠层）.Thiscanopyblocksoutalotofsunlight,sothegroundintherainforestisoftendarkanddamp（潮Manyanimalsintherainforestliveinthetrees.Monkeysswingfrombranchtobranch,andbirdsbuildtheirnestsinthetrees.Therearealsomanyinsectsandsmallanimalsthatliveintheleavesandunderthebarkofthetrees.Therainforestisveryimportantfortheearth.Ithelpstokeeptheclimatestable（稳定的）.Thetreesintherainforestabsorb（吸收）carbondioxidefromtheairandreleaseoxygen.Thisisveryimportantforalllivingthingsontheearth.However,therainforestisfacingmanyproblems.Peoplearecuttingdowntreesforwoodandtomakespaceforfarmsandcities.ThisisdestroyingthehomesofmanyanimalsandplantsIfwedon'ttakeactiontoprotecttherainforest,manyspecies（物种）maydisappearforever.WhatistherainforestIt'sdryandIt'sfulloflifeandthegroundisoftendarkandIthasfewplantsandIt'scoldandWhydomanyanimalsliveinthetreesintheBecausethereismorefoodintheBecausethetreesprovidethemwithBecausetheyliketoswingfrombranchtoBecausethegroundistoohardforthemtoliveWhatistheimportanceoftheItcanmaketheclimatechangeItcanabsorboxygenfromtheIthelpstokeeptheclimateItcanprovidepeoplewithalotofWhatproblemsistherainforestTherearetoomanyanimalsin B.PeoplearecuttingdownC.It'sgettingtoo D.ThereisnotenoughWhatwillhappenifwedon'tprotecttheTheclimatewillbee B.MoreanimalswillliveinC.Manyspeciesmay D.Thetreeswillgrow答案：1.B2.B3.C4.B5.“ProtectingtheForest”80ProtectingtheForestsareveryimportantecosystemsontheearth.Theycovernearlyathirdoftheearth'slandarea.Forestsarehometomillionsofplantsandanimals.Theplantsinforeststakeincarbondioxideandproduceoxygen,whichisessentialforlife.Theyalsotrappollutionandhelpcleantheair,sopeopleoftencallforeststhe"lungs"oftheearth.However,forestsarefacingseriousproblems.Peoplecutdowntreesforvariousreasons,suchasgettingwoodforbuildingandmakingpaper.Thisleadstolessspaceforwildlifeandmorepollutionintheair.Somewildanimalsevenlosetheirhomesandareindangerofdyingout.Toprotecttheforests,wecantakemanyactions.First,weshouldstopcuttingdowntreeswithoutpermission.Wecanalsoplantmoretreestoincrease