八年级英语上册 第24期课件 牛津深圳版.ppt

第24期 语法运用grammarinuse一 if引导的条件句我们在七年级时已经学过结构为 主句用一般将来时 if引导的从句用一般现在时 的条件句来谈论可能发生的事件 if从句的一般现在时用于表述可能发生的动作或情况 主句用一般将来时表述条件成立时可能产生的结果 例如 1 ifyouwalkalongtheroad youwillseemanybuildings 如果你沿着这条路走 你会看见许多建筑 2 youwillnotfeeltiredinthemorningifyougotobedearlyatnight 如果你晚上早点睡 你早上就不会感到累 今天 我们来学习if条件句用来表示条件和结果之间存在必然联系的用法 当表示客观事实 结果时 if条件句的主句和从句都用一般现在时 1 ifyouhitthewindowwithahammer itbreaks 如果你拿榔头砸窗户 它会破裂 2 theroombecomesbrightifyouturnonthelight 如果你打开灯的话 房间会变明亮 语法笔记 1 if从句可以放在句首 也可以放在句末 如果把if从句放在句首 常用逗号将其与主句分开 例如 ifthetemperatureisbelowzero waterturnsintoice waterturnsintoiceifthetemperatureisbelowzero 如果温度低于零摄氏度 水就会变成冰 2 if引导的条件状语从句中通常不用一般将来时 在需要表达将来含义时 一般用现在时表示 二 if not和unless1 if not和unless都可以用来引导条件状语从句 if not表示 如果 不 而unless表示 除非 当它们引导条件状语从句时 可以互相转换 例如 ifyoudon tfinishyourhomework iwon tletyouplayoutside 如果你不完成你的作业 我不会让你出去玩 unlessyoufinishyourhomework iwon tletyouplayoutside 除非你完成你的作业 否则我不会让你出去玩 2 if not和unless引导的从句和主句的位置可以互换 但是当从句在前 主句在后时 一般用逗号隔开 反之 则不用逗号 ifshedoesn tstartoffnow shewillbelate shewillbelateifshedoesn tstartoffnow 如果她现在不出发 她会迟到 unlessshestartsoffnow shewillbelate shewillbelateunlessshestartsoffnow 除非她现在出发 否则她会迟到 语法笔记 1 在unless引导的从句里 通常用现在时表示将来 例如 unlessyouhaveabetteridea i lltakehisadvice 除非你有更好的主意 否则我将听取他的意见 2 unless用于引出某事发生或成立所必需的条件 例如 youshouldnotpromiseanythingunlessyoucandoit 除非你能做到 否则不要随便许诺 实战演练i 根据句意 用if或unless填空 1 youputpaperintoafire itburns 2 iwon tletyouplayfootball youfinishcleaningyourbedroom 3 we llhavetostayintheclassroom itkeepssnowing if unless if 4 youworkhard youwon tpasstheenglishexam 5 it seasytorememberthenewwords youhaveagoodmemory unless if ii 将下列单词或词组连接成句 6 i get won t abroad if don t go chance the i 7 go she every no she shopping day will money unless has iwon tgoabroadifidon tgetthechance shewillgoshoppingeverydayunlessshehasnomoney 8 a it candle you burns light if 9 my me the surf i mother my finish internet won t homework let unless 10 bus we if a take it be will cheaper itwillbecheaperifwetakeabus ifyoulightacandle itburns mymotherwon tletmesurftheinternetunlessifinishmyhomework iii 用括号中的词或结构将下列句子转换为同义句 11 iwon tgotosleepifidon tfinishmyhomework unless 12 unlessyoureceivetheinvitation youcan tgotothemeeting if not ifyoudon treceivetheinvitation youcan tgotothemeeting iwon tgotosleepunlessifinishmyhomework 13 ifyoucan trememberthepassage youmustreaditagainandagain unless 14 youwon tlivehereunlessyouhaveenoughmoney if not youwon tlivehereifyoudon thaveenoughmoney unlessyoucanrememberthepassage youmustreaditagainandagain 15 ifyoudon tfinishyourwork thebosswon tletyougo unless 16 hewon tstopplayingcomputergamesunlessheistired if not hewon tstopplayingcomputergamesifheisnottired unlessyoufinishyourwork thebosswon tletyougo iv 单项选择17 playingwiththesekidsisnecessary youwanttomakefriendswiththem a ifb untilc unlessd though 18 kittywillspendmoretimewithherchildrenifshe amother a becomesb becomec becamed becoming19 maryoftenwalksthedogintheafternoon badweatherstopsher a whenb unlessc becaused since 20 youringtony hewon tknowaboutthepartyonfriday a ifb whenc unlessd however21 ifyoudropamirror 镜子 it a breakingb breakc broked breaks 短语收藏夹phrasecollectionunit7短语聚会1 takeout 从银行账户中 提取 款 2 pouroutof从 中涌出3 stayrelaxed保持放松4 switchoff关掉5 turninto变成6 put into 把 放进 里面7 getatoothache牙疼 8 abalanceddiet均衡的饮食9 slowdown 使 放慢速度 松劲10 inthemiddleof在 中间11 atthebeginning开始12 makeafunnynoise发出奇怪的声音13 exerciseone sbrain锻炼某人的头脑14 liveahealthylife过着健康的生活 操练场 根据句意从上面选择适当的短语并用其正确形式填空 补全句子 1 ididn tknowhim butlaterwebecamegoodfriends 2 thelightswhenyouleavetheclassroom 3 mrsgreen alotofmoneyfromthebankjustnow atthebeginning switchoff tookout 4 ifyou youshouldn teatsweetfood 5 people thebuildingafteritcaughtfire 6 whenyoutakeanexam 7 ifyoufeeltiredwhenyouarerunning youcan getatoothache pouredoutof stayrelaxed slowdown 8 thetallmanstanding thecrowdseemsupset 9 whenthewaterboils therice theboiledwater into inthemiddleof put forunit7sectiona forgrammar i 连接下面分句 组成条件句 1 ifbearsfeelindanger 2 yougetfour 3 ifyoupouroilinwater 4 youwillmissthetrain 5 ifyougooutintherain e d c g a 6 unlessyoustudyhard 7 itturnsintowater 8 shewillkeeponsinging 9 wewillgoonapicnic 10 unlessivisiteverybookstoreinthetown f b j h i a yougetwet b ifyouheatice c itfloats d ifyoudivideeightbytwo e theyattackpeople f youwon tpasstheexamination g ifyoudon thurryup h ifitdoesn traintomorrow i ishallnotknowwhethericangetwhatiwant j unlesssheistoldtostop ii 用括号中动词的正确时态完成条件句 11 ifthere be alotoftraffic ourjourney take alongertime 12 ifyou sleep badlyatnight youoften feel tiredthenextday 13 ourbrains work betterifwe be healthy is takes sleep feel work are 14 unlessyou return thebookstothelibrary you abletoborrowmorebooks 15 yourdad let yougoouttoplayunlessyou tidy upyourbedroom tidy return won tbe won tlet iii 根据句意 选用if或unless连接句子 16 fishdie thereisnowater 17 mybabysisternevercries sheishungry mybabysisternevercriesunlesssheishungry ifthereisnowater fishdie 18 iruneverymorning badweatherstopsme 19 youaren tcareful youwillmakeamistake 20 i mfreethissunday iwillvisityou ifi mfreethissunday iwillvisityou iruneverymorningunlessbadweatherstopsme ifyouaren tcareful youwillmakeamistake sectionb forspeaking i 根据汉语提示写单词 补全句子 每空一词 1 我过去常常吃肉 但现在吃得很少了 i meat butnowieatmuchless usedtoeat 2 今天是我人生中最好的一天 因为我见到了我最想见的人 todayis becauseisawthepersoniwantedtomeetmost 3 我对刚才所发生的一切感到不适应 i whathappenedjustnow thebestdayofmylife feelbadabout 4 我不理解你所说的 能给我举个例子吗 idon tunderstandwhatyousaid canyou 5 很高兴见到你 我将带你游览这个地方 i llshowyouaroundthisplace gladtomeetyou givemeanexample ii 阅读下面短文 按照句子结构的语法性和上下文连贯的要求 在空格处填入一个适当的词或使用括号中词语的正确形式填空 there remanymethodstohave 6 goodmemory suchasassociating creatingimages developing 7 interestinthesubject 8 havingabreakorrest a an and somepeoplehave 9 good memorythanothers 10 theyarebetterat 11 create images whenthingscometotheirbrain theywillrecallswiftly 敏捷地 12 addition buildingaconnectionhelpspeopleconnectonethingwithanother astudyshowsthatpracticecanimprove 13 we memory forexample wedevelopour better because creating in our abilitiestosolvemaths 14 problem bydoingalotofexercises moreimportantly weshould 15 have abreakorrestafterlearningforalongtimebecausehavingaresthelpsourbrainstomakenewconnections have problems sectionc forwriting 根据汉语提示写单词 补全句子 每空一词 1 你等我一下 我从银行取些钱给你 pleasewaitformeforawhile andiwill somemoneyfromthebankforyou takeout 2 当我跟朋友在花园玩时 我突然听到有只猫发出奇怪的声音 wheniplayedwithmyfriendsinthegarden isuddenlyheardacat 3 我昨天梦到许多钱从机器中涌出 yesterday idreamtlotsofmoney making afunnynoise pouredoutofthemachine 4 新学期开始 大家都渴望见到他们的老同学 ofthenewterm everyoneiseagertoseehisorheroldclassmates 5 我家在这栋楼的中间位置 myhomeis ofthisbuilding atthebeginning inthemiddle 6 记得把这张相片放到你的钱包里 rememberto thephoto 7 我这里没有硬币 只有些纸币 idon thavecoinswithme just put into yourwallet somenotes 8 你们已经连续工作了六个小时 请停下来休息一会儿 youhavekeptworkingforsixhours please 9 最后 我们没有完成工作 因为所给的时间不够 wedidn tfinishtheworkbecausewedidn thaveenoughtime stoptohavearest intheend 10 在公共场合发表演讲对我来说是一个特殊的记忆 makingaspeechinpublicis forme aspecial memory sectiond formorepractice i 从方框中选择合适的短语 并用其适当的形式完成句子 1 peopleshouldhave everydaybecauseit sgoodfortheirhealth 2 ifyouwanttohaveagoodmemory youshouldoften abalanceddiet exerciseyourbrain 3 everyonehasto tokeephealthy 4 regularexercisemakesyourbrainbecomesharp 5 ifyoudon toftengetenoughsleep youbrainwill liveahealthylife lotsof slowdown ii 根据汉语提示写单词 补全句子 每空一词 6 这周末你计划做什么 whatdoyou thisweekend 7 每天有一个好的睡眠很重要 agoodsleepeveryday plantodo it simportanttohave 8 我们必须给大脑足够的时间休息 wemust ourbrains 9 考试之前要保持放松的状态 beforeyourexams 10 如果你尝试一些新事物 你就能保持大脑活跃 ifyoutrysomethingnew youcan keepyourbrainactive give enoughtime torest stayrelaxed 参考答案语法运用 实战演练i 1 if2 unless3 if4 unless5 if ii 6 iwon tgoabroadifidon tgetthechance 7 shewillgoshoppingeverydayunlessshehasnomoney 8 ifyoulightacandle itburns 9 mymotherwon tletmesurftheinternetunlessifinishmyhomework 10 itwillbecheaperifwetakeabus iii 11 iwon tgotosleepunlessifinishmyhomework 12 ifyoudon treceivetheinvitation youcan tgotothemeeting 13 unlessyoucanrememberthepassage youmustreaditagainandagain 14 youwon tlivehereifyoudon thaveenoughmoney 15 unlessyoufinishyourwork thebosswon tletyougo 16 hewon tstopplayingcomputergamesifheisnottired iv 17 a18 a19 b20 c21 d 短语收藏夹1 atthebeginning2 switchoff3 tookout4 getatoothache5 pouredoutof6 stayrelaxed7 slowdown8 inthemiddleof9 put into 随堂练sectionai 1 e2 d3 c4 g5 a 6 f7 b8 j9 h10 i ii 11 is takes12 sleep feel13 work are14 return won tbe15 won tlet tidy iii 16 ifthereisnowater fishdie 17 mybabysisternevercriesunlesssheishungry 18 iruneverymorningunlessbadweatherstopsme 19 ifyouaren tcareful youwillmakeamistake 20 ifi mfreethissunday iwillvisityou sectionbi 1 usedtoeat2 thebestdayofmylife3 feelbadabout4 givemeanexample5 gladtomeetyou ii 6 a7 an8 and9 better10 because 11 creating12 in13 our14 problems15 have sectionc1 takeout2 makingafunnynoise3 pouredoutofthemachine4 atthebeginning5 inthemiddle 6 put intoyourwallet7 somenotes8 stoptohavearest9 intheend10 aspecialmemory sectiondi 1 abalanceddiet2 exerciseyourbrain3 liveahealthylife4 lotsof5 slowdown ii 6 plantodo7 it simportanttohave8 give enoughtimetorest9 stayrelaxed10 keepyourbrainactive 八年级英语unit7听说题i 1 b2 c3 c4 a5 b ii 6 byusingthemtomakesentencesandwritin