初三英语Unit13Theworld’spopulation知识精讲一.本周教学内容：Unit13Theworld’spopulationI.词汇：increase,if,multiply,challenge,beginning,square,hardly,prefer,used,beg,worth,secondhand,diagram,discussion,chart,download,path.II.词组和惯用法：hourafterhour一小时又一小时multiply…by……乘以…atthebeginningof…起初、开始moreandmore越来越…preferto宁愿（选择），更喜欢ratherthan宁可，是…而不是…begone’spardon请原谅，对不起bebusydoing忙着做…lookatthetable看这张表格slowdown下降、放慢standingroomonly只有立足之地inoneyear一年后enoughspace足够的地方themoredevelopedcountries发达国家thelessdevelopedcountries不发达国家III.日常交际用语What’sthepopulationof…It’sabout…billion.Doyouthinkitwillincrease?Whatcanbedonetoslowdownthepopulationincrease?IV.语法：（1）数的写法和读法（2）过去将来时的构成及其在宾语从句中的应用。二.重点、难点：1.populationA.集合名词，多用单数Theworld’spopulationisgrowingfastandfast.B.在询问人口与人时，注意people和population的不同。Howmanypeople用复数Whatthepopulation用单数HowmanypeoplearethereinBeijing?What’sthepopulationofBeijing?C.表示人口多少要用large与small来修饰，而不能用very与few来修饰。JapanhasasmallerpopulationthanChina.D.population作主语时，谓语可以用单数，也可以用复数，指一个地区或国家的整体人口时，谓语动词通常用单数；强调整体人口中的成员时，谓语动词通常用复数。ThepopulationofBeijingislargerthanthatofNanjing.Onethirdofthepopulationofthiscountryarefarmers.2.challenge.A.用作名词意为“挑战、邀请比赛，常跟介词短语to或动词不定式.Hehasreceivedachallengetoagame.B.用作动词时，意为“邀请…比赛，向…挑战，也常接介词短语to或动词不定式Ichallengedhertoagameoftennis.我邀请她和我赛一场网球。Hechallengedmetoplaychess.他向我挑战下象棋。3.fasterandfaster比较级＋and＋比较级，表示越来越…moreandmore可用来修饰名词，形容词、副词、动词等。Thedaysaregettinglongerandlonger.Moreandmorepeopleknowthatit’simportanttolearnEnglishwell.4.atthebeginningofA.beginning是名词“开始、开端”，反义词endingAgoodbeginningmakesagoodending.B.atthebeginningof=atthestartofAtthebeginningofthecenturyawarbrokeout.C.in（at）thebeginning是副词短语，意为“起初、开始时”，相当于atfirst.Inthebeginningshedidn’tknowwhoIwas.5.hardly几乎不，简直不，同义词组为almostnot,almostnothing,almostnobody.A.hardly一般位于行为动词之前，be动词之后或第一个助动词之后。Wehardlyhavetimetoplaygames.Thereishardlyanythingintheroom.Icouldhardlystoplaughing.B.如果强调hardly而将其置于句首，整个句子需倒装。“hardly＋助动词＋主语＋实义动词”HardlydidIsleeplastnight.Hardlycanshebelieveherowneyes.C.句中有hardly时，反意疑问句中的助动词用肯定形式。Hecanhardlyworkouttheproblem,canhe?6.prefer的用法A.prefer（preferred,preferred,preferring）Ipreferrice.Iprefertoplayfootball.Ipreferplayingfootball.B.prefer（doing）Ato（doing）B.与B相比，更喜欢A同义短语，like…betterthanC.ratherthan.宁可、是…而不是…Iratherthanyoushoulddothework.该做这工作的是我，而不是你。Heisamusicianratherthanateacher.与其说他是老师，还不如说他是音乐家。D.prefer…ratherthan…宁愿，做某事而不愿做另一件事。Thesedayssomepeopleprefertotalkonthephoneratherthanwriteletterstoeachother.现在有些人宁愿打电话也不愿写信。7.worthA.worth是形容词，beworth“有…价值，值…”Thedictionaryisworthtendollars.B.beworthdoing“值得做…”Thisbookisworthreading.Thisproblemisworththinkingabout.【模拟试题】（答题时间：90分钟）I．选择填空1.Thatcityhas______population.A.alittleB.afewC.asmallD.much...
