PAGEUnit1FoodforthoughtSectionⅢGrammar—情態動詞(一)新知導引選擇適當的情態動詞填寫下面教材中的句子并體會它們的語法特征：beableto/dare/haveto/hadbetter/need/must/can1．I'veenjoyedfoodfrombothcountrieseversinceI________________holdaknifeandfork—andchopsticks!2．ButtherearestillsomedishesthatDad________________nottryevenaftermanyyearsofmarriagetomymother.3．He________________havethoughtIwasjoking.4．Dad________________cookasuper“fullEnglishbreakfast”ofbacon,eggs,beans,sausagesandtoastwithbutter—MumandIjust________________findawaytogethimintothekitchen!5．Mumsayswe________________noteattoomuchroastfoodasitmaymakeussufferfromheatinsideourbodies...6．“You________________nottryitifyoudon'twantto，”Mumsaid...語法精講一、基本特征1．情態動詞有肯定的詞義，不能單獨作謂語，需和實義動詞或系動詞一起作謂語。ShecanspeakEnglishthoughsheissix.雖然她才6歲，但她會說英語。2．情態動詞一般無人稱和數的改變，個別情態動詞有現在時和過去時兩種時態改變。Theymustbeintheclassroom.他們肯定在教室里。3．構成否定句時，not放在其后面。Theyoungmancan'tcarrythebigstone.這個年輕人搬不動那塊大石頭。4．情態動詞后接動詞原形。Joggingcanbeharmfultothehealth.慢跑可能會對身體健康有害。二、beableto的用法1．beableto后跟動詞原形，表示詳細的實力，與can的用法相近。Iamnotabletoansweryourquestion.我回答不了你的問題。2．beableto與can/could的區分。(1)beableto有更多的時態形式，can只有一般現在時和一般過去時。Willyoubeabletocometomorrow?你明天能來嗎？I'msorryIhaven'tbeenabletoansweryourletterintime.很愧疚我沒能剛好給你回信。(2)was/wereabletodosth.表示過去勝利做成了某事，相當于succeededindoingsth.。could僅表示客觀上有某種實力，不說明實施該實力后的結果。Themathsproblemwashard,butIwasabletoworkitout.這道數學題目雖難，但是我能把它做出來。Bythetimeshewaseight,shecouldreadGreekandLatin.她八歲就會讀希臘文和拉丁文了。(3)beableto可用在may/might，want之后。Iwanthertobeabletouseacomputer.我希望她能運用電腦。[即學即練]選詞填空(can/beableto)(1)Ifyouhaveagoodsleep,youwill________________workoutthisproblem.(2)WhenIwasyoung,I________climbanytreesinthewoods.(3)Who________answerthisquestion?(4)Hemight________________fixyourcar.三、haveto的用法1．haveto意為“不得不，必需”，后跟動詞原形。Ihavetobeoffnow.Mymumiswaitingforme.我得走了。媽媽在等我。2．haveto與must的區分。(1)must強調說話者的主觀意愿；haveto強調客觀上的必要性。Thelastbusleft,andhehadtowalkhome.最終一班公共汽車走了，他只好步行回家。ImustfinishtheprojectbyFriday.周五前我必需完成這個項目。(2)mustn't不許，不行以，表示禁止；nothaveto不必。Youdon'thavetodotheworkrightnow.你現在不必做這項工作。Youmustn'tplayfootballinthestreet.你千萬不要在大街上踢足球。[即學即練]完成句子(1)我還想了解一下學這門課程得付多少錢。I'dalso1iketoknowhowmuchI________________forthecourse.(2)新法律禁止人們酒后駕車。Thenewlawstatesthatpeople________________afterdrinkingalcohol.(3)我們不必焦急，因為時間很充裕。We________________hurry,forthere'splentyoftime.(4)我們必需在6點以前到家。We________________homebysix.四、hadbetter的用法hadbetter后跟動詞原形，表示“最好……”，其否定形式在hadbetter后加not。Wehadbettergettherebeforeitgetsdark.我們最好天黑前到達那里。You'dbetternottalksoloudly.你最好不要這么大聲說話。[即學即練]完成句子(1)你最好不要乘飛機去那里。You________________therebyplane.(2)你最好當心謹慎。You________________watchout.五、dare與needneed和dare既可用作情態動詞，也可用作實義動詞。用作情態動詞時，主要用于否定句和疑問句中；用作實義動詞時，可用于各種時態。(1)用作情態動詞—Areyoucomingwithme?—Ican't,Alice.Idaren't.——你要和我一起去嗎？——不行，愛麗絲。我不敢。It'squitewarmhere;weneedn'tturntheheatingonyet.這里很暖和，我們還不必開暖氣。(2)用作實義動詞Youdon'tneedtodoityourself.你不必親自做這件事。MostpeoplehateHarrybuttheydon'tdaretosayso.大多數人對哈利敢怒不敢言。[即學即練]單句語法填空(1)Dareyou________(tell)herthenews?(2)Idaren't________(go)outaloneatnight.(3)Hedares________(say)whateverhewantstosay.(4)Youneedn't________(come)ifyouarebusy.(5)Ineed________(get)somesleep.Ⅰ.單詞語法填空1．Thisisquiteimportant,becauseitisdirectly________(relate)toyourcommitment.2．Ourhostssharedmanyoftheirexperiencesand________(recommend)wonderfulplacestoeat,shop,andvisit.3．Thisisn'tthefirsttimethattechnologyhaschangedour________(manner)．4．Exercisingmakesyoumoreawakeandready________(handle)whateverisaheadofyoufortheday.5．Larrytoldherthathehadalreadyputoutthefireandsheshouldnotmove________casesheinjuredherneck.6．Becauseacollegecommunitydiffers________thefamily,manystudentswillstruggletofindasenseofbelonging.7．Weareaddictedto________(buy)newthings.8．Bendyourknees________(slight)andreachoutyourarmsliketreebranches,naturallyandsoftly.Ⅱ.選詞填空(可變換形式)eq\x(beableto/haveto/hadbetter/dare/need)1．________________ItellTomwhathappenedtoday?2．She________notsaywhatshethinks.3．________youletoutthenewstothepublic?4．Thelittleboy________________dolotsofhousework,forhisparentsaresufferingfromillness.5．He________________speaktwoforeignlanguages.6．You________________gethomebeforemidnight.7．Wedidn't________________answerthequestionyesterday.8．You________________notgoout,hadyou?9．Shedoesn't________________tocometoschoolatpresent.10．Iwill________speakEnglishinanotherfewmonths.Ⅲ.完成句子1．你別擔憂我，我能照看好自己。Don'tworryaboutme,I________________________myself.2．吉姆終于抑制住了生氣，從而避開了一場毆斗。Jim________________________hisangerandavoidafight.3．你不得再拖延了，記住，切莫依靠明天。You________________________itoffanylonger,remember,tomorrownevercomes.4．必需聲明，這種疾病是人類已知的最為困難的疾病之一。It________________________thatthisillnessisoneofthemostcomplexconditionsknowntoman.5．我須要今日干完這活嗎？________________________theworktoday?6．這輛自行車須要修理。Thebike________________________________________________________________________.7．星期天我們不用去上學。We________________________________onSundays.8．我非得給經理寫封信不行。I________________________tothemanager.9．而且，你最好保持均衡的飲食。What'smore,you____________________abalanceddiet.10．你怎么敢對你父親說那種話？How________________thattoyourfather?eq\x(溫馨提示：請完成課時作業二)SectionⅢGrammar—情態動詞(一)新知導引1．wasableto2.dare3.must4．can;haveto5.hadbetter6.need語法精講二、