牛津英语8A复习_Unit_4

.,8AUnitFour,牛津初中英语复习之,.,四会单词：N.:bear/giantpanda/kangaroo/bambooshoot/hunter/fur/farmer/forest/nowhere/danger/action/writer/camel/fox/giraffe/polar/tortoise/wolf/zebra/bamboo/report/attack/poison/character/farmland/mice/smell/lossAdj.:wild/safe/thick/sharpAdv.:sadlyV.:protect/encourage/step/hunt/sell/train,.,三会单词：alive/delicious/squirrel/following/spit/male/medicine/insect/chairperson/peaceful/continue/suitable理解的单词：dolphin/survive/rainforest/snail/upright,.,重点句型1.Attheverybeginning,XiWangdrankhermothersmilkforupto14hoursaday.2.Mothersoftenleavebabypandasfortwowholedaysontheirown.3.Ifpeoplefindbabypandasalone,theywilloftentakethemaway.4.Ifgiantpandasareindanger,whatcanwedo?5.encouragefarmerstoleavethegiantpandasreserves/encouragesb.todosth.,.,6.IfIdontbuythem,someoneelsewillbuythem.7.Ifwecontinuetobuildroads,theywonthavesuitablehomes.8.Babygiantpandasspendalotoftimedrinkingtheirmumsmilkuptofourteenhoursaday!/spendsometimedoingsth.9.Mothergiantpandashaveonlyoneortwobabiesatatime.10.Theirnumberisgettingsmallerandsmallerbecausetheirlivingareasarebecomingfarmlands.11.Iffarmerskeeptakingtheland,giantpandaswillhavenowheretolive.,.,语法：条件句引导条件状语的词或词组有：if(如果，假如),unless(除非，如果不)，solongas(只要)，aslongas(只要)，incase(如果，万一)，ifonly(只要),onlyif(如果)等。如：(a)IfitisfinenextSunday，weshallhaveaspringouting如果下星期日天气好，我们就去春游。(b)Youwillnotpasstheexamunlessyoustudyhard如果你不努力学习，就不会通过考试：(c)Iwillgothereaslongasheinvitesme.只要他邀请，我就去那里。(d)Takeanumbrellawithyouincaseitrains.你带把伞，以防下雨。,.,If引导的条件句条件句表示将来可能发生的情况If引导的条件句可以表示将来“可能”发生的情况，即主句事态的发生有赖于条件分句事态的发生。此时说话人或是把条件视为事实。或者仅仅提出条件，不作任何主观设想，如果条件实现，主句内容便成为事实，如果条件不实现、结果也就不会发生。一般条件分句动词用一般现在时形式，主句动词用willshall-不定式的一般将来时形式。如：(a)Ifitstopsraining，Illgoforawalk.如果雨停了，我就去散步。(b)Ifitdoesntstopraining,Illstayathome如果雨不停，我就呆在家里。(c)Ifitsready,hellbringittomorrow如果准备好了，他明天就把它带来。(d)Whatareyougoingtodoifitrains?如果下雨，你们要干什么?(e)Ifyoudonthurryandgettherebeforefiveoclock，hellleavetheofficeandgohome如果你不快点，在五点前到那儿的话，他就会离开办公室回家。(f)Ifhehasfinishedhisworkbysixoclock，weshallbeabletotakehimwithus如果他到六点完成工作的话。我们就可以带他一起去。(当条件状语从句强调动作的完成时，从句中用现在完成时比用一般现在时更确切。),.,条件句表示重复性的、可预见的情况If引导的条件句也可以表示重复性的、可预见的情况或习惯动作，此时条件分句的动词用一般现在时，主句动词也用一般理在时。如：(a)Tigersliveasafamilyiftheyhavebabies如果老虎有了虎崽的话，它们就群居。(b)Ifapolarbearishungry，itcatchesfishfromthewater如果北极熊饿了，它就从水里抓鱼。(C)Iflionsliveinthewild，theylookforfoodthemselves如果狮子生活在野外，它们就自己寻找食物。(d)Ifwetrainelephants，theydoheavyworkforus如果我们训练象的话，它们能为我们干重活。(e)Ifitrains,Igotoworkbytaix如果天下雨，我乘出租车上班。(f)IfImakeapromise，Ikeepit.如果我许诺，我就信守诺言。,.,条件句表示真理和事实If引导的条件句还可以表示普遍真理和客观事实，在这种条件句中，if的意义接近于whenever，可成“当的时候”。此时条件分句的动词用一般现在时，主句动词也用一般现在时。如：(a)Ifyouheatice，itmelts冰受热会融化。(b)Ifyoupouroilonwater，itfloats将油倒在水上，油会浮在表面。(c)Ifthetemperaturedropsto0C，waterfreezes当温度降至OC时水结冰。,.,注意if还可引导宾语从句，试比较：(a)WellgotovisittheGreatWallifitdoesntraintomorrow如果明天不下雨，我们就去长城。(b)Wedontknowifitwillraintomorrow我们不知道明天是否会下雨。这里第一句中的if引导的是条件从句，第二句中的if引导的是宾语从句，意思为“是否”，从句中的时态根据主句的时态而定。另外，whether也可用于引导宾语从句，可与if替换；但whether可与or连用，而if不能。如：(a)Iwanttoknowwhetherifshestilllivesthere我想知道她是否还住在那里。(b)Heaskedwhetherifyoureceivedtheletter他问你是否已经收到了那封信。(c)DoyouknowwhetheriftheyllleaveforJapan你知道他们是否要去日本。(d)Pleasetellmewhetheryoucancomeornot请告诉我你是否能来：(此句不可用if替换),.,练习：I.Completethesentenceswiththecorrectformofthewordsinbrackets.1Canyoufindanymistakesinthe_(follow)sentences?2Giantpandasarequietand_(peace)animals.3Iftigershavebabies,they_(live)asafamily.4Ithinkits_(danger)totouchwildanimals.5Becareful!Thereare_(wolf)inthemountain.,.,II.CompletethesentencesaccordingtotheChineseprovidedinbrackets.Usethecorrectformofthewords.1CanJimworkoutthismathsproblem_(单独地)?2Weshouldtryourbestto_(保护)wildanimals.3InAustralia,NewZealandandSouthAfrica,sharks_(攻击)peopleeveryyear.4MrWualways_(鼓励)ustoworkhardinourlessons.5Ifhuntersdonothunt,tigerswill_(生存).6_(遗憾地是),wedontseemtohavemuchchanceofwinningthematch.,.,III.Fillintheblankswiththecorrectformoftheverbsinbrackets.1Ifhe_(come)heretomorrow,he_(see)hisfather.2Thestudentsarebusy_(get)readyfortheirlessons.3Whenthetraffic_(stop),youcancrosstheroad.4Ifyou_(notstudy)hard,you_(notpass)theexam.5They_(help)thefarmers_(pick)applesifit_(notrain).6Plea