高中英语《Unit 2 Healthy eating》period 2课件 新人教版必修3.ppt

healthyeating period2 learningaboutlanguage warmingup preparefor discoveringusefulwordsandexpressions onpage12 ex1 lie2 getawaywith3 raw4 curiosity5 customer6 benefitex2 2 oughtto4 diet5 raw8 balanced9 energetic10 slimbecomethinner loseweight3 beinglaughedatbyherfriends losingface6 feltsosadandhopelessaboutherself loseheart7 wasunwillingtovisitanymore loseinterestinvisiting preparefor discoveringusefulstructures onpage13 ex2 oughtto shouldn t needn t don thaveto needn t will2 haveto mustn t3 oughtto should presentation grammar 主要情态动词 can couldmay mightmustoughttoneeddare dared can 表能力 icanreadveryfast 表客观可能性 marycan tbetheleader 表允许 youcantakeitaway 表怀疑 howcanyoufinishit could 表能力 可能性 couldyoufinishitsoon 表怀疑 hecouldnotbe50 委婉地提出问题 couldyoushowmethepassport 用于虚拟 ifyouhadcome youcouldhavegotawonderfulgift may 询问或说明可不可以做 mayiaskyouaquestion 表可能会发生 hemaygetangry 表目的或让步的从句 comehereintimesothatyoumayseethesinger might 表可能的事 同may 表目的从句 同may 用于虚拟 ifyouhadfinishedit thebossmighthavegivenyousomepromotion must 表必须做的事 youmusthandinyourhomeworkthisfriday 表揣测 itmusthaverainedlastnight 表 偏偏 的意思 hemustgetafeverwhenwewerereadytogetoff oughtto 表应该做的事 yououghttodoitcarefully 表非常可能的事 heoughttobeherebynow need 表需要 主要用于否定句或疑问句 weneedn thurry 可用于否定意思的句子 idon tthinkyouneeddoit 作及物动词 和不定式连用 hedidn tneedtosaythattoher dare 表 敢于 主要用于疑问句 否定句和条件从句 hedarenottellhimthenews 作及物动词 与不定式连用 wedon tdaretoenterthehouse shall用于第一 三人称疑问句 征求意见或请求shall第二 三人称陈述句 命令 警告 允诺 威胁should表劝告 建议 命令 顺理成章oughtto表应该 语气 should美语中 oughtto用于否 疑句时to可省 多数情况下 oughtto可与should互换使用 疑问句中常用should代替oughtto oughtto的反意疑问句用shouldn t替代 oughtto表示 想必会 时语气较must弱 shall should oughtto 你最好不要抽烟了 youshould oughttostopsmoking yououghttohavehelpedhimwithhisenglish won tyoub oughtnotyouc shouldn tyoud wouldn tyou 他们想必已到那儿了 theyoughttobetherebynow 语气较must弱 比较hadbetter should oughtto 三者均表示建议 意为 应该 应当 或 最好做 三者的语气程度为渐强 hadbetter指一般性的建议 最弱 should oughtto含义相近 常可互换 区别在于 oughtto常指特殊情况下的 应当 should则指一般情况 见例句 yououghttohelphimbecauseheisintroublenow 语气强 有命令意味 youshouldhavearestafterfinishingyoursports 一般性建议 haveto haveto表示客观需要去做的事情 意为 必须 不得不 ihavetogetthestationearlytocatchthefirsttrain wemissedthebussowehadtowalkhome wehavetoovercomeallkindsofdifficulties haveto有多种时态 常见的有 一般将来时wewillhavetogatherattheschoolgateat7tomorrow 一般现在时ihavetotakemoremoneywithmebecausemygirlfriendhassomuchtobuy 一般过去时finally wehadtogiveupourideatoholdapicnicoutsideasitrainedforawholeafternoon haveto 考点 musttheydo yes theymust no theyneedn t don thaveto must haveto must表主观意志 而haveto表由于客观因素不得不做完成的事情 must没有过去式 除在间接引语中可表示过去的时间 在直接引语中表示过去的时间用hadto代替 itoldherthatshemustgiveupsmoking shesaid wehadtogeteverythingreadythatnight 比较must haveto needido yes youmust no youneedn t dare need 注意对need问句的回答 needifinishtheworktoday yes no no youmust youneedn t youdon thaveto needn t对其它情态动词的回答 shallitelljohnaboutit no you no you mustwedoitnow no you no you needn t don thaveto needn t don thaveto exercises 高考链接1 isjohncomingbytrain heshould buthe not helikesdrivinghiscar 高考真题 a mustb canc needd may2 ithasbeenannouncedthatcandidates 候选人 remainintheirseatsuntilallthepapershavebeencollected 高考真题 a canb willc mayd shall3 iheardtheywentskiinginthemountainslastwinter 高考真题 it truebecausetherewaslittlesnowthere a maynotbeb won tbec couldn tbed mustn tbe practice1 高考考题专练1 ithoughtyou likesomethingtoread soihavebroughtyousomebooks a mayb mightc wouldd must2 whereismypen i it a mightloseb wouldhavelostc shouldhavelostd musthavelost3 ididn thearthephone i asleepa mustbeb musthavebeenc shouldbed shouldhavebeen b d b 4 therewerealreadyfivepeopleinthecar buttheymanagedtotakemeaswell it acomfortablejourneya can tbeb shouldn tbec mustn thavebeend couldn thavebeen5 it snearlyseveno clock jack behereatanymoment a mustb needc shouldd could d c 6 didthetrainarriveintime no it twohoursago a musthavearrivedb oughttohavearrivedc mustarrived oughttoarrive7 mustidrivetohishouseandpickupthechildren no a youshouldn tb youmightnotc youneedn td youmustn t b c 8 wedidn tseetomatthemeetingyesterday heit a mustn thaveattendedb cannothaveattendedc needn thaveattendedd wouldhavenotattended b 9 thereissomeoneknockingatthedoor itbetom a canb mustc shouldd oughtto a 10 twoyearsago myhusbandboughtmeabicycle ifyouliveintown itisoftenfasterthanacarandyouworryaboutparking a mustnotb maynotc shouldnotd don t