高中英語必修二課時學(xué)案Unit2LetscelebratePeriod2Usinglanguage

Unit2Let’scelebrate!Period

2

Usinglanguage

知識點梳理單元語法精講精練－情態(tài)動詞（二）I.語法感知感知以下課文原句，完成方框下的小題1．ThatiswhyLettersfromFatherChristmascouldbetheperfectbook...2．Thechildrenmusthavebeenveryexcitedastheyopenedit.3．Theletterswerealsobeautifullyillustrated—eachmusthavetakenitstrueauthor...4．Inanotherletter，F(xiàn)atherChristmasplainedabouthowhecouldnotstophishelpers...5．Interestingly，thelettersdidnotcontaintheusualwarningstochildrenthattheymightnot...6．...wecanallsharethetruespiritofgivingatChristmastime.1．以上句子中，句1、句4和句6中的情態(tài)動詞表能力。2．句5中的情態(tài)動詞表可能性。3．句2和句3中的情態(tài)動詞表猜測，意思是“一定已經(jīng)發(fā)生了”。II.語法精析1．can與could的用法(1)表示能力(could是過去式)。MygrandmothercandosomeshoppingontheInternet，butshecouldn’tlastyear.我奶奶會網(wǎng)購了，但是去年她還不會。(2)表示猜測，意為“可能”，一般用于疑問句和否定句(could是過去式)。Canthisnewsbetrue？這則消息是真的嗎？(3)表示請求和許可(could表示更委婉的語氣，回答時只能用can)?！狢an/CouldIgonow?—Yes，youcan.——我現(xiàn)在可以走了嗎？——是的，可以。(4)用于肯定的陳述句中，表示理論上或習(xí)慣上的可能性。Asweallknow，anyonecanmakemistakes.我們都知道，任何人都可能犯錯。(5)習(xí)慣用法“cannot...too...”表示“無論怎樣……都不過分，越……越好”。有時cannot可用cannever替代。Wecannotthankyoutoomuchforwhatyou’vedoneforus.對于你們?yōu)槲覀兯龅囊磺校覀冊趺锤屑つ銈兌疾贿^分。2．may與might的用法(1)表示允許、許可。might在語氣上比may更委婉。以may/might開頭的問句在否定回答中要用mustn’t/can’t?！狹ay/MightIplaytheputergamesaftersupper?—Yes，youmay./No，youmustn’t/can’t.——晚飯后我可以玩電腦游戲嗎？——是的，可以。/不，不行。(2)表示把握不大的推測，意為“可能”，用于肯定句。might語氣更加不肯定，指現(xiàn)在或?qū)?，只有在賓語從句中mightdo(be)才表示過去的可能性。①Ithinkhemayetomorrow.我認為明天他可能會來。②Hetoldmehemightbelate.他告訴我他可能會遲到。(3)may用于祈使句表示祝愿。Mayyousucceed.祝你成功。3．must的用法(1)表示“必須”，語氣比should，oughtto強烈。其否定形式為mustn’t(不準；禁止)。Youmustn’tdothat，becauseyoumustkeepyourword.你不能那么做，因為你得遵守諾言。溫馨提示以must開頭的一般疑問句的肯定回答中要用must，否定回答中要用needn’t/don’thaveto。—MustIfinishthepapertoday?—Yes，youmust./No，youneedn’t/don’thaveto.——今天我必須完成論文嗎？——是的，你必須。/不，你不必。(2)表示有把握的肯定推測，只能用在肯定句中，意為“一定；準是”；在否定句、疑問句中要用can’t代替。Youhaveworkedhardallday.Youmustbetired.辛苦工作了一整天，你一定累了。(對現(xiàn)在情況的推測判斷)(3)表示感情色彩，意為“偏偏；偏要”，常指令人不快的事情。ThecarmustbreakdownjustwhenIwasabouttostart.我正要出發(fā)時車偏偏拋錨了。4．情態(tài)動詞＋havedone“can/could/may/might/must＋havedone”表示對過去事情的推測。各情態(tài)動詞的這種具體用法如下表：can/couldhavedone1.過去可能做了(表推測)2.本能做而未做(表虛擬)should/oughttohavedone本該做而未做may/mighthavedone1.過去也許做了(表推測)2.本可能做而未做(表虛擬)musthavedone一定已經(jīng)做了needn’thavedone本不必做而做了Fromwhatyousaid，shemusthavetoldyouallaboutit.從你所說的來看，她一定把一切都告訴你了。YoushouldhavetoldmeearlierorImighthavegonewiththem.你本應(yīng)該早點告訴我，不然的話我就會和他們一塊去了。Theycouldhavesentupthesatellitesuccessfully.他們本來有能力成功發(fā)射這顆衛(wèi)星的。Yououghtto/shouldhavebeenmorecareful.你本應(yīng)該更小心一些的。Youneedn’thavetoldthemaboutit.你本來沒有必要告訴他們那件事。III.高考鏈接A.選詞填空（can/could，may/might，must)1.Theexpert_______________arriveat9o'clock，butIamnotsure.2.TomesfromAustralia；he_______________speakEnglishverywell.3.Mary_______________playtheviolinwhenshewasfive.4.Samuel,thetallestboyinourclass，_______________easilyreachthebooksonthetopshelf.5.He_______________breakalegjustbeforewegoonholiday.6.－Can'tyoustayalittlelonger?－It'sgettinglate.Ireally_______________gonow.Mydaughterishomealone.7.You_______________beCarol.Youhaven'tchangedabitafteralltheseyears.8.You_______________feelallthetrainingawasteoftime，butI'mahundredpercentsurelateryou'llbegratefulyoudidit.9._______________Iuseyourmobilephone?10.Ifsomeonehadattemptedtosavehim，he_______________nothavedrowned.答案：1.may2.can3.could4.can5.must6.must7.must8.may9.May/Can/Could10.mightB.用適當?shù)那閼B(tài)動詞或所給動詞的正確形式填空1．I_________etothepartywithyou，butIamnotsureaboutit.2．Iheardyouboughtanewbook._________Ihavealookatit?3．You_________trytelephoningMrSmith;he_________behomenow.4．Itisapitythathe_________breakalegjustbeforewegoonholiday.5．Look！Theroadiswet.It_________(rain)lastnight.6．Hereyesarered.She_________(be)cryinglastnight.7．You_________(see)thefamousfilmWolfWarriorⅡasyouknowsomuchabouttheplot(情節(jié))．8．WhenIwasachild，I_________watchTVwheneverIwantedto.答案：

1.may/might2.May3.can；may4.must5.musthaverained6.musthavebeen7.musthaveseen8.couldC.完成句子9．Ican’tfindmypurse.I________________(可能把它忘在)inthesupermarketyesterday，butI’mnotsure.10．Intoday’sinformationage，thelossofdata________________(能引起嚴重的問題)forapany.11．You________________(一定小心)thecamera.Itcosts！12．You________________(可能感到)allthetrainingawasteoftime，butI’mahundredpercentsurelateryou’llbegratefulyoudidit.13．Itwassonoisythatwe________________(不能聽到)ourselvesspeak.答案：9.could/mighthaveleftit10.cancauseseriousproblems11.mustbecarefulwith12.mayfeel13.couldn’thearD.單句寫作1．他是如此偉大的一個人，我們無論怎樣贊揚他都不過分。____________________________________________________________________________________________2．祝你在新的一年里好運連連！____________________________________________________________________________________________3．他為什么每天偏偏中午彈鋼琴呢？____________________________________________________________________________________________4．他們一定去過長城，不是嗎？____________________________________________________________________________________________5．史密斯先生不可能去北京了，因為我剛才在圖書館看見他了。_______________________________________________________________________________________