人教版 选修六 Unit 4 Global warmingGrammar课件（31张PPT）.ppt

人教课标版高二选修6unit4 英语课件 discoveringusefulwordsandexpressions p28 gooverthenewwordsandphrasesintheprevioussections thencompleteeachsentencewithoneofthosenewwordsorphrases 2 1 charleskeelingcollected onthecarbondioxidecontentintheatmosphereoveraforty yearperiod hefoundthattheamountofcarbondioxide increasingduringthattime data kepton 2 althoughweareburningcoalinhuge everyyear wewon t ofitforcenturies 3 iftheamountofgreenhousegasescontinuesto wecouldbefacingaglobal quantities runout buildup catastrophe 4 manyscientistsbelievethatglobalwarminghas throughtheburningoffossilfuels comeabout 5 the ofarisingsealevelwouldbewidespreadflooding consequence 6 onthewholethewarmingoftheearthisa thatcausesgreatconcern 7 the showstemperaturechangesduringthe20thcentury 8 onehectareofforestcanabsorb23tonsofcarbondioxide year phenomenon graph per 9 thewashingmachineusestoomuchenergy but webuyamoreeconomicalone itwouldstillusetoomuchwater 10 thecaraccidentonthemainroadyesterday onedriver sdeath evenif resultedin i 代词ita 用作人称代词 代替前文提到的事物 mywatchismissing ican tfind it anywhere herfatherhasgoneabroad haveyouheardabout it b 代替指示代词this that what sthis it s acomputer whosepenisthat it smine c 表示时间 天气 距离 季节等 it stimeforlunch it sgettingwarmerandwarmer it sfortyyearssincemyhometownwasliberated it ssummernow howfarisitfromheretothe ii 引导词 a 作形式主语 代替由不定式 动名词或从句表示的真正主语 其基本句型为 it 形式主语 adj to v it 形式主语 adj that subject 主语 v itis pp that sb sth istodo itis noun 从句 itbeadj forsb todosth itbeadj ofsb todosth it snogood usedoing it s well worthdoing it sfundoing itisveryimportanttohelpeachother itisnouse uselessgoingthereagain it snotdecidedyetwhentheywillleaveforshanghai itseemsthathehascaughtacold heseemstohavecaughtacold b 作形式宾语 6123结构主语 谓语 it 形式宾语 宾语补足语 todosth doingsth 或that从句 marxfounditimportanttostudythesituationinrussia shethoughtitnousetowritetohimagain theywanttomakeitcleartothepublicthattheydoanimportantandnecessaryjob c 用在强调句型中 为了强调句子的某一成分 通常是主语 宾语或状语 常用结构 itis was 被强调部分 that who itwasiwho that mettominthestreetyesterday itwastomthatimetinthestreetyesterday itwasinthestreetthatimettomyesterday itwasyesterdaythatimettominthestreet 主语 宾语 时间状语 地点状语 imettominthestreetyesterday p29 典型例题分析 1 itwaslastnight isawthefilmstarwars a whob whenc thatd which 答案c强调句的结构是 it be 强调部分 that who 主谓句 强调句的连词只有两个 that和who 当强调的部分是人 且为句子的主语时 才用who 其余用that 2 itistenyears missgreenreturnedtocanada a thatb whenc sinced as答案c考点是连词用法 本题易误选为a其实本句不是强调句 周报 若是去掉itbe that还应是一个完整的句子 而本句去掉 itis that 只剩下tenyearsmissgreenreturnedtocanada不成句 因此本句不是强调句 itis 时间 since 其中is hasbeen 1 itwasthisvillage iwasbought a whereb thatc onwhichd which 练习i 2 itwasinthisvillage iwasboughtup a whereb thatc onwhichd which 3 wasitunderthetree youwereawaytalkingtoafriend sure butwhenigotbackthere thebikewasgone a thatb wherec whichd while ii 根据下列各句句意及所给单词的首字母或汉语提示 写出各单词的正确形式 1 theorganizationhasbeenine for25years 2 whatisthea rainfallforaugustinyourcountry 3 theearthquakecausedaw damagetothearea 4 withthedevelopmentoftechnology peoplearemoreandmorefamiliarwith 外部的 space outer existence average widespread iii 每空填一词 使该句与所给句子的意思相同 1 wedependonenergytodomanythings energy wedependontodomanythings 2 hedidn tgotoschoolbecausehewasill becausehewasill hedidn tgotoschool itis that itwas that 3 myfatherdidn treturnuntil11o clocklastnight 11o clock myfatherreturnedlastnight 4 davidboughtawalkmanfromastoreyesterday david boughtawalkmanfromastoreyesterday itwasnotuntil that itwas that who 5 themountainclimberwasrescuedwiththehelpofthelocalpeople withthehelpofthelocalpeople themountainclimberwasrescued 6 herunclemovedoutofthecityandsettleddowninasmallvillageforthisreason forthisreason herunclemovedoutofthecityandsettleddowninasmallvillage itwas that itwas that 7 whatonearthdoyouwantmetosay youwantmetosay 8 ididn treceivethemanager sreplyuntilnearlyamonthlater nearlyamonthlater ireceivedthemanager sreply whatisitthat itwasnotuntil that 9 marxmettracyinpairsin1845 inpairs marxmettracyin1845 10 thefootballmatchhadtobecalledoffbecauseitrainedheavily becauseitrainedheavily thefootballmatchhadtobecalledoff that itwas