Unit6SpaceandBeyondGrammar課件高二英語(yǔ)選擇性

Unit6Period2Grammar課堂學(xué)習(xí)1Lookatthesentencesfromthereadingpassageandanswerthequestions.aMillionswatchedthatfirstlunarlanding...aware...ofthemanythingsthatcouldgowrong.bTheworldwentintoshock,mostpeoplehavingassumedthatthisspaceflightwouldbenomoredangerousthantravellinginanaeroplane.cIcanrememberthatdaysoclearly,watchingthetake-offonTVatschool,...dThesacrificeoftheChallengercallstous,remindingusthatwemustcontinuetoreachforthestars,...Review:modals1Whichsentencetalksaboutability?c2Whichsentencetalksaboutpossibility?a3Whichsentencetalksaboutnecessity?d4Whichsentencetalksaboutprediction?b5Whatothermodalsdoyouknow?Whatdotheyindicate?Will,may,might,haveto,shall,should,oughtto,need,dare...Nowlookformoresentenceswithmodalsinthereadingpassage.1.Withtheeyesofstudentsacrossthenationuponher,shemighthaveinspiredanentirelynewgenerationofastronautsandspacescientists.2.Buttherewasneveranydoubtthatmannedflightswouldcontinue,andon29September1988,thespaceshuttleprogrammeresumedwiththesuccessfullaunchofDiscovery.3.Thememoryofthosesevenwillliveforever,writteninthestars,inspiringustojointheminhumanity'sgreatestjourneyofexplorationanddiscovery.4.ThesacrificeoftheChallengercallstous,remindingusthatwemustcontinuetoreachforthestars,nomatterhowdistanttheymightseem.【語(yǔ)法講解】情態(tài)動(dòng)詞情態(tài)動(dòng)詞本身有一定的詞義，表示語(yǔ)氣的單詞。但是不能獨(dú)立作謂語(yǔ)，只能和動(dòng)詞原形一起構(gòu)成謂語(yǔ)。情態(tài)動(dòng)詞用在行為動(dòng)詞前，表示說話人對(duì)這一動(dòng)作或狀態(tài)的看法或主觀設(shè)想。情態(tài)動(dòng)詞雖然數(shù)量不多，但用途廣泛，主要包括下列單詞和短語(yǔ)：can(could)、may(might)、must、haveto、will(would)、need、oughtto、dare(dared)、shall(should)。2.may,might(1)

表示請(qǐng)求和允許。might比may語(yǔ)氣更委婉，而不是過去式。否定回答時(shí)可用can’t或mustn’t，表示“不可以，禁止”。

—Might/MayIsmokeinthisroom?我能在這屋里抽煙嗎?

—No,youmustn’t.不可以。

用MayI...?征詢對(duì)方許可時(shí)比較正式和客氣，而用CanI...?在口語(yǔ)中更常見。(2)

用于祈使句，表示祝愿。

Mayboththebrideandgroomhavelongandhappylives.

祝新郎新娘白頭偕老，幸福美滿。(3)

表示推測(cè)、可能性（不用于疑問句）。might不是過去式，它所表示的可能性比may小。

Hemay/mightbeverybusynow.他現(xiàn)在可能很忙。(2)

must是說話人的主觀看法,而haveto則強(qiáng)調(diào)客觀需要。must只有一般現(xiàn)在時(shí),haveto有更多的時(shí)態(tài)形式。

Hisplayisn’tinteresting,Ireallymustgonow.

他的比賽沒意思,我現(xiàn)在必須走了。

IhadtoworkwhenIwasyourage.

當(dāng)我是你這個(gè)年齡時(shí)我不得不工作。(3)

表示推測(cè)、可能性(只用于肯定的陳述句)

You’reTom’sgoodfriend,soyoumustknowwhathelikesbest.你是湯姆的好朋友,所以你一定知道他最喜歡什么。4.will,would(1)

表示請(qǐng)求、建議等,would更委婉。

Will/Wouldyoupassmetheball,please?

請(qǐng)把球傳給我好嗎?(2)

表示意志、愿望或決心。

Iwillneverdothatagain.

我再也不會(huì)這樣做了。

Theyaskedhimifhewouldgoabroad.

他們問他是否會(huì)出國(guó)。5.should,oughtto(1)

should,oughtto表示“應(yīng)該”，oughtto表示義務(wù)或責(zé)任，比should語(yǔ)氣重。

Ishouldhelpherbecausesheisintrouble.

我應(yīng)該幫助她，因?yàn)樗新闊?/p>

Yououghttotakecareofthebaby.你應(yīng)該照顧嬰兒。(2)

表示勸告、建議或命令。should、oughtto可通用，但在疑問句中常用should。

Youshould/oughttogotoclassrightaway.

您應(yīng)該/應(yīng)該馬上去上課。

ShouldIopenthewindow?我應(yīng)該打開窗戶嗎?(3)

表示推測(cè)

should,oughtto(客觀推測(cè)),must(主觀推測(cè))。

Hemustbehomebynow.(斷定他已到家)

他現(xiàn)在一定在家。

Heoughtto/shouldbehomebynow.(不太肯定)

他現(xiàn)在應(yīng)該在家。(4)

should(表示可能)假如,萬(wàn)一

Ifyoushouldchangeyourmind,doletmeknow.

如果你改變主意,一定要告訴我。6.shall(1)

shall用于第一人稱,征求對(duì)方的意見。

Whatshallwedothisevening?今晚我們做什么?(2)

shall用于第二、三人稱,表示說話人給對(duì)方的命令、警告、允諾或威脅。

Youshallfailifyoudon’tworkhard.(警告)

如果你不努力工作,你就會(huì)失敗。

HeshallhavethebookwhenIfinishit.(允諾)

我讀完這本書后,他就可以拿到了。

Heshallbepunished.(威脅)

他將受到懲罰。2Readthepassageandchoosethecorrectmodals.On15October1997，theCassinispacecraftsetoutonamissiontoexploretheplanetSaturn.SogreatwasthedistancefromEarththatitwould/shallneedtotravelforalmostsixyearstoreachitsdestination.WhenitreachedSaturn,itsentbackamazingimagesoftheplanet’sfamousringsviewedinultravioletlight.CassinimadenumeroustripsaroundSaturnsoitcould/mustcollectdata.Overthefollowingyears,Cassinitooksome450,000imagesoftheplanetanditsmoons.Finally,on15September2017,CassiniwaspointedtowardsSaturnsothatitshould/wouldmeetafieryend.ScientistshaddecidedthatCassinicould/mustbedestroyedthisway,soitmust/wouldnotcollidewithanyofSaturn’smoons.Initsnearly20-yearmission,Cassiniprovidedsomuchinformationthatscientistscould/wouldnotprocessitall.Nowondersomanypeopletooktosocialmediatobiditgoodbye,saying,“Farewell,dearCassini!Weshall/shouldneverforgetyou!”3Lookatthepictureandtellastoryusingmodalswhereappropriate.Icouldn’tbelieveitw