广东省深圳市文汇中学八年级英语上册 Module 4 School life Unit 7 Memory P3 Grammar课件 （新版）牛津深圳版.ppt

grammar unit7memory 1 tolearntheconditionalsentences2 tolearnif notandunless objectives conditionalsentences 2 ifyoumakethepicturebig strangeorsilly youwillrememberitbetter review thesimplepresenttense thesimplefuturetense wehavealreadylearnttouseconditionalsentencestotalkaboutprobableresults conditionalsentences ifi mhungry iwill ifi mtired iwill eatsomefood havearest lookandsay review ifi mill iwillseeadoctor ifi mlate iwillsaysorry ifitrainstomorrow i willwatchtvathome ifit tomorrow i llplaybasketball doesn train ifyoutakeafishoutofwater itdies ifyouswitchoffthelight therooms becomesdark trytofinishthefollowingsentences theresultthatwillcertainlyhappen theresultthatwillcertainlyhappen ifyouputsaltintowater ifyouheatice itdisappears itturnsintowater apossibleaction theresultthatwillcertainlyhappen apossibleaction theresultthatwillcertainlyhappen if引导的条件状语从句 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 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隔开 如 waterturnsintoiceifthetemperatureisbelowzero ifthetemperatureisbelowzero waterturnsintoice 注意 if引导的条件状语从句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 readtheseif clausesanddrawlinestomatchthemwiththeresults a1 inpairs makeconversationsaboutthesentencesina1onpage103 a2 s1 whathappensifyouswitchoffthelamp s2 theroombecomesdark s1 areyousure s2 ofcourse i msure ifyouswitchoffthelamp theroombecomesdark s1 whathappensifyouputwoodintowater s2 itfloats s1 areyousure s2 ofcourse i msure ifyouputwoodintowater itfloats completethesesentenceswiththewordsinbrackets a3 ifyou ice water turns heat it into ifyou steam water into cool turns it oil water on floats pour it you if water it you heat boils if heat itturnsinto cool itturnsinto floatsifyoupouriton boilsifyouheat if notandunless havealk 1 ifyoudonotgetenoughsleepeverynight youwillnotrememberthingswell 2 unlessyougetenoughsleepeverynight youwillnotrememberthingswell 3 youwillforgetsomethingveryquicklyunlessyouunderstanditwell 4 youwillbelateforschoolifyoudonotleavenow 5 unlessyouimproveyourhandwriting youwilllosemarksintheexam 1 youdo getenoughsleepeverynight you thingswell 2 you enoughsleepeverynight you thingswell 3 you somethingveryquickly you itwell 4 you forschool you now 5 you yourhandwriting marksintheexam not if willnotremember unless get willnotremember willforget unless understand willbelate if donotleave unless improve youwilllose go ready ifyoudonotworkhard youwillnotsucceed 如果你不努力 你就不会成功 unlessyouworkhard youwillnotsucceed 除非你努力工作 否则你不会成功 unless意为 除非 和if not 如果 不 的意思相近 且两个结构通常可以互换使用 在unless引导的从句里 通常用现在时表示将来 如 i llnotattendthepartyunlessheinvitesme 除非他邀请我 否则我不会参加这个派对 unlessyouhavegoodidea i lltakehisadvice 除非你有更好的主意 否则我将采取他的建议 注意 unless用于引出某事发生或成立所必需的条件 如 除非你能做到 否则不要随便许诺 youshouldnotpromiseanythingunlessyoucandoit 1 如果明天不下雨 我们就去远足 ifit wewillgohiking wewillgohiking unlessitrains doesn traintomorrow tomorrow exercise 用unless和if not完成句子 2 除非天下雨 他通常是走路去上学 heusually onfootifit heusually onfoot 3 如果你现在不走 你就赶不上火车了 ifyou you thetrain you thetrain goestoschool unlessitrains goestoschool doesn train don tleavenow unlessyouleavenow won tcatch won tcatch drawlinestomatchthebeginningofthesentencesincolumnawiththeendingsincolumnb p105 b1 rewritethefollowingsentenceswithunless p105 b2 2 youwillgetatoothacheifyoudonotbrushyourteetheveryday unlessyoubrushyourteetheveryday youwillgetatoothache youwillgetatoothacheunlessyoubrushyourteetheveryday 3 thisroomwillgetveryhotifyoudonotopenthewindow 4 ifyoudonotclosethatwindow flieswillgetin unlessyouopenthewindow thisroomwillgetveryhot thisroomwillgetveryhotunlessyouopenthewindow unlessyouclosethatwindow flieswillgetin flieswillgetinunlessyouclosethatwindow 5 iwillleavethisrestaurantifthewaiterdoesnotcomesoon unlessthewaitercomessoon iwillleavethisrestaurant iwillleavethisrestaurantunlessthewaitercomessoon 条件状语从句 if从句 unless从句 主将从现 主现从现 时态口诀 将来 客观事实习惯 review if引导的条件状语从句歌 if条件句不一般 几个要点记心间 条件句放在前 逗号要放句中间 条件句表可能 主句多用将来时 条件句表事实 主句常用现在时 if条件句有特点 现在时把将来替 这个规则要牢记 1 ifhe come i tell himaboutthenewsatonce 2 youcan tbuytheipadunlessyou have enoughmoney 3 amouse run awayquicklyifit see acat 4 ifit notsnow tomorrow we go sightseeing 5 youcan ttakepartintheactivityunlessyou be amemberoftheclub comes willtell have runs i 根据句意用所给单词的适当形式填空 sees doesn tsnow willgo are 1 除非你早点起床 否则你会赶不上早班公共汽车 unless 2 如果你把冰放在火上 它会融化 if 3 如果你把图书馆的书丢了的话 你就得赔偿 if ii 根据汉语及括号内的提示翻译句子 youwillnotcatchtheearlybusunlessyougetupearly ifyouputiceontofire itmelts ifyoulosethelib