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1、Unit5NelsonMandela-aModernHero教学目标:形容词的比较级的相关用法，及补充说明。Ⅱ重难点突破:㈠倍数的表达方法：倍数可用half（一半），double（两倍），twice（若干倍）等词表示，具体用法如下所示：⑴倍数+as+形容词+as…eg.Myhandwritingisnothalfasgoodasyours.⑵倍数+形容词的比较级+than…eg.Thisroadistwicelongerdeeperthanthatone.⑶倍数+thesize(length,width,heigth,depth)o
2、f…eg.Ourschoolisthreetimesthesizeofyours.特别提示：请注意以下两个例句中倍数的翻译方法：Thisroomisthreetimesaslargeasthatone.这个房间有那个房间三个大。Thisroomisthreetimeslargerthanthatone.这个房间比那个房间大两倍。强化训练：①ItisreportedthattheUnitedStatesuses__________energyasthewholeofEurope.A.astwiceB.twicemuchC.twicem
3、uchasD.twiceasmuch②Thehouserentisexpensive,I’vegotabouthalfthespaceIhadathomeandI’mpaying___________here.A.asthreetimesmuchB.asmuchthreetimesC.muchasthreetimesD.threetimesasmuch㈡“比较级+and+比较级”结构（两个同义形容词的比较级），表示“越来越……”的意思。eg.Winteriscoming.It’sgettingcolderandcolder.冬天来了
4、，天气越来越冷。Thegirlbecomemoreandmorebeautiful.这个姑娘长得越来越漂亮。㈢“the+比较级+the+比较级”结构，表示“越……，就越……”的意思。eg.Thebusiermymumgets,thehappiersheis.我妈妈越忙就越高兴。㈣在形容词比较级前可以用：alittle,abit,alot,rather,no,any,(very)much,far,even,still,yet等副词来修饰。强化训练：选出正确表达方式：①Thismetalisverymuch/abitheaviertha
5、nsteel.②Leadisalot/lotheavierthansteel.③Thischemistryexperimentisrather/anycomplicated.④Itisalittle/lotslongerthanbefore.利用所给词将句子补充完整：warm,healthy/long,more/more,more/less,big①The__________________peopleare,the______________theywilllive.②The______________werecycle,the_
6、____________wewaste.③Theplanetisgetting__________________.④Accordingtoscientists,theuniverseisgetting_________________________.⑤The_______________peopleintheworld,the________________resourcesweuse.单项选择：①You’restandingtoonearthecamera.Canyoumove___________?A.abitfarB.al
7、ittlefatherC.abitoffatherD.alittlefar②Ourneighbourhas______________ours.A.asabighouseasB.asbigahouseasC.thesamebighouseasD.ahousethesamebigas③MaryKeptweghingherselftoseehowmuch_______________shewasgetting.A.heavierB.heavyC.theheavierD.theheaviest④Borishasbrains.Infact,
8、Idoubtwhetheranyoneintheclasshas________________IQ.A.ahighB.ahigherC.thehigherD.thehighest
