河北省新乐市第一中学高中英语 Unit2 Healthy eatingGrammar课件 新人教版必修3.ppt

grammar findthesentencescontainingmodalverbsinthereadingpassage thenusuallybylunchtimetheywouldallbesold whatcouldhavehappened nothingcouldbebetter somethingterriblemusthavehappenedif hecouldnotbelievehiseyes perhapsheshouldgotothelibraryandfindout hehadbetterdosomeresearch eventhoughhercustomersmightgetthinaftereatingyonghui sfood theywouldbecometiredveryquickly modalverbs a should oughtto都可表示 应该 oughtto用于表示按道理应当 常指客观的义务或责任 大多数情况下可用should代替 但比should语气重 ishouldhelpherbecausesheisintrouble yououghttotakecareofthebaby b 表示劝告 建议或命令时 should和oughtto可通用 但在疑问句中常用should oughtto的否定式为oughtn tto或oughtnotto youshould oughttogotoclassrightaway shouldiopenthewindow whatshouldwedonext c should oughtto都可表示推测 heoughtto shouldbehomebynow thisiswheretheoiloughtto shouldbe should和oughtto后面跟动词不定式的完成式 其肯定句表示 过去应该做而未做 其否定句则表示 过去不该做但做了 youshould oughttohavemadethedecisionaweekago ishouldn thavemadesuchafoolishmistake 多数情况下 oughtto可与should互换使用 oughtto的反意疑问句用shouldn t替代 注意 yououghttohavehelpedhimwithhisenglish a won tyoub oughtnotyouc shouldn tyoud wouldn tyou 2 must和havetomust的用法1 表示主观的义务和必要 主要用于肯定句和疑问句 意思为 必须 得 要 由must引起的疑问句 肯定回答要用must或haveto 否定回答要用needn t或don thaveto 意思是 不必 must的否定形式mustn t表示禁止 意思是 不能 不许 如 mustifinishthetaskrightnow 我现在必须完成这个工作吗 yes youmust yes youhaveto 是的 no youneedn t no youdon thaveto 不 不必 youmustn tcomeherewithoutpermission 未经允许 你不能来这儿 haveto的用法 1 must表示一种主观的需要 而haveto表示一种客观的需要 意思是 不得不 如 ihavetoattendanimportantmeetingthisafternoon 今天下午我不得不参加一个重要的会议 motherisout soihavetolookaftertheshop 妈妈不在家 因此我不得不照看商店 2 haveto的否定形式是don thaveto 相当于needn t 如 theydon thavetobuyacomputeratpresent 他们目前没有必要买电脑 考例 thebosshasgiveneveryoneaspecialholiday sowe gotoworktomorrow 上海2007春 a can tb mustn tc needn td shouldn t 点拨 考查情态动词 根据题意 可知这里表示 没有必要 故只能选c项 考例 whatdoyouthinkwecandoforouragedparents you doanythingexcepttobewiththemandbeyourself 重庆2007 a don thavetob oughtn ttoc mustn td can t 点拨 根据题意 除了和他们呆在一起做你自己外 没有必要做任何事情 可知这里选择don thaveto表示 不必 故选a项 3 must和needneed作情态动词时 只能用于疑问句和否定句 构成否定句和疑问句时不借助于助动词do needifinishtheworktoday yes youmust no youneedn t b must的肯定形式表示 必须 否定式表示 禁止 严禁 youmustcomehere youmustn ttakethebookawayfromthelibrary 用下列图片造句 做适当的运动 youshoulddosomesports 慢慢地进食 并有助消化 yououghttoeatslowlyandit sgoodfordigestion youshouldhelptosetthedinnertable youshouldkeepyourroomclean wemustlistentotheteachercarefully wemustn teatinclass yououghttohandonthehomeworkontime youshouldn tbelateforschool weshouldaskquestionactively weshouldn tmakenoiseinclass makesentences 1 你每天最少要练习一小时口语 youmustpractisespeakingenglishatleastanhouraday 2 我每天不得不练习一小时口语 ihavetopractisespeakingenglishanhouraday 3 你应该每天练习不止一小时 yououghtto shouldpracticeenglishformorethananhour 4 你应该读一下这个 它写得很好 yououghtto shouldreadthis it sverygood 5 你必须读这个 写得精彩极了 youmustreadthis it smarvelous pleasechooseaproperphraseandaccordingtothesituationscompletethesentencesbyusingshould not orought not to 1 lisaneedsachange she 2 mysalaryisverylow you should oughttotakeafewdaysoff shouldlookforanewjob 3 nickalwayshasdifficultygettingup he 4 whatabeautifulview you 5 billy sroomisn tveryinteresting he oughtnotto shouldn tgo tobedsolate shouldtakeaphoto shouldn t oughtnottouseher carsomuch choosesuitablemodalverbsbelowtocompletethefollowingdialogues ought oughtn ttoshould shouldn tmustn tneedn t don t havetowillcan can t 1sam howcanigrowthinner mum mum well you eatfoodwithplentyoffibrethathelpsyoudigestbetter andyou stopdrinkingcolaoreatingsweetfood haveto should sam doesitmeani eatmyfavouritefriedchickenanymore mum notexactly ifyoulovefriedchicken you giveitup justeatitlessoften you worrytoomuch alittlefriedchicken doyougood shouldn t needn t don thaveto needn t shouldn t will 2doctor youaresickbecauseyou veeatenpoisonousmushrooms wheredidyougetthem lucy ipickedthemintheforest iknowwe eatfreshvegetables doctor oh butyou eatthemuntilyou resuretheyarenotpoisonous lucy thankyou doctor i llbemorecarefulnexttime haveto mustn t 3charles iwishicouldseethingsclearlyinthedark tom eatingcarrots helpyouseebetter you eatsomeeveryday oughtto should 1 todiscusssomethingwithsomeonesothatyoucanmakeadecisiontogether2 tochangefoodthatyouhavejusteatenintosubstancesthatyourbodycanuse 练习坊 i 根据下列英文解释写出所缺的单词 consult digest 3 alongpointedorangevegetablethatgrowsundertheground4 containingpoisonorproducingpoison carrot poisonous 1 foralongtime i vebuiltmybusinesswithpeoplewhoare 精力旺盛的 creative andhappyabouttheirwork 2 thisrichfooddoesn t 消化 easily energetic digest 根据下列各句句意及所给单词的汉语提示 写出各单词的正确形式 3 thedishofboiledbeefand 胡萝卜 tastesgood 4 anincreasingnumberofpeopleare 请教 theiraccountantsaboutthetaxlaws 5 thismedicineis 有毒 iftakeninlargequantities carrot consulting poisonous must oughtn tto don thaveto couldn t mustn t needn t can t haveto ii 用所给的情态动词填空 1 you goonworkingbecauseyoulooksotirednow 2 theweatherturnedouttobefineyesterday i havehadthetroubletocarrymyumbrellawithme oughtn tto don thaveto needn t must oughtn tto don thaveto couldn t mustn t needn t can t haveto 3 ifyouearnmorethan 5 000 you paytax 4 you playnow youshallfinishyourhomeworkfirst 5 iknowthingsarehardwithyou butyou trytogetoverthedifficulties haveto mustn t must haveto must oughtn tto don thaveto couldn t mustn t needn t can t haveto 6 ididn tseeheratthemeetingthismorning she havespokenatthemeeting couldn t can t 1 ithoughtyou likesomethingtoread soihavebroughtyousomebooks a mayb mightc wouldd must2 whereismypen i it a mightloseb wouldhavelostc shouldhavelostd musthavelost 高考链接 3 ididn thearthephone i asleep a mustbeb musthavebeenc shouldbed shouldhavebeen 4 isjohncomingbytrain heshould buthe not helikesdrivinghiscar 2002高考题 a mustb canc