Should与Ought-to的讲解和练习

Should与OughttoI.复习1.Somepeoplecanlivewithoutmeat.2.MayIusethephoneplease,Mr.White?3.Couldyoutellmesomethingaboutthebook?4.Youmustnotsmokehere.5.Whatflavorwouldyoulike,chocolateorstrawberry?6.Weshouldputrubbishinthebin.7.Sheshouldn’tdiscussit.8.Shouldwediscussitnow?/Oughtwetodiscussitnow?--Yes,weshould/oughtto.--No,weshouldn’t/oughtnotto.9.Thestudentsoughtnottosleepintheclass.10.Tomoughttohandinhishomeworkontime.II.二者区别：ShouldOughtto意思表示主观看法，有“劝告、建议”的意思，即“按我的想法该如何”强调主观看法，语气比较委婉.一些建议，劝说时，译作“应当”比should语气强,更多反映客观情况，“有义务”或“必要”做某事，有时带有责备或督促的意味,译为“应当，应该”.否定表示某动作不一定要做表示做某事一定是错误的虚拟语态√×时态ShouldOughtto肯定句sb.shoulddosth.sb.oughttodosth.否定句sb.shouldnotdosth.sb.oughtnottodosth.一般疑问句Shouldsb.dosth.?Oughtsb.todosth.?简略回答Yes,sb.shoulddosth.No,sb.shouldnot/shouldn’tdosth.Yes,sb.oughttodosth.No,sb.oughtnot/oughtn’ttodosth.should和oughtto在用法上要注意以下3点：1.没有人称和数的变化。2.后面接动词原形。3.可用来构成否定句、疑问句及简明答语。oughtto是唯一一个可加to的情态动词!oughtto具体用法:1.(表示义务、责任等)应当,应该Yououghttoworkharderthanthat.2.(表示劝告、建议等)应该,Youdon'tlookwell.Yououghttogotoseethedoctor.3.(表示猜测、期望)总应该，理应Itoughttobeafinedaytomorrowmorning.4.“oughtto+have+过去分词”表示过去应做某事而实际未做Yououghttohavetoldmethat(butyoudidn't).这时oughtto和should可以互换使用。Should具体用法:1.表义务意为”应该”Youshoulddowhatyourparentstellyou.Heshouldn’tstayupsolate.2.表温和的建议或指正Thisnameiswrong;itshouldbespelledSymthe,notSmith.3.表期待.意为”可能”Thatshouldbeeasy.Sheshouldbehereinaminute.4.可用于完成时,完成时表示过去应该做而未做的事情Attheageofthirty-fiveIshouldhaveunderstood.5.用于第一人称疑问句询问对方意愿,但与其较委婉温和ShouldIopenthewindow?6.表惊讶等感情I’msurprisedthatheshouldsayso.HowshouldIknow?7.表委婉语气,常与say,think等动词连用Ishouldsayheisoverthirty.Ishouldthinkitisagoodfilm.III.练习单项选择1.We______helpthepeopleinneed.A.canB.oughttoC.shouldD.could2.One______crossthestreetagainsttheredlight.A.oughtnotB.oughttonotC.shouldn’ttoD.oughtn’tto3.Imissedthetrain.You______methatthetimetablehadchanged.A.shouldtotellB.shouldhavetoldC.oughthavetotellD.oughthavetold4.We______throwtherubbishintothebin.A.shouldB.oughttoC.mayD.would5.Parents______raisetheirchildrenuntiltheyare18.A.shouldB.oughttoC.mayD.would6.They______discussitnow.A.oughttonotB.notoughttoC.don’toughttoD.oughtnotto7.______he______hisparentsaboutthisproblem?A.Should,listensB.Ought,listenstoC.Should,listentoD.Ought,listento8.He______hereontime.A.shouldcameB.shouldcomeC.shouldcomesD.shouldcoming9.You______buytheticketbeforegettingonthetrain.A.oughtB.shouldC.mustn’tD.can’t10.Toprotectoureyes,we______keepenoughdistancefrombookswhenwereadthem.A.shouldn’tB.oughtnotC.oughtnottoD.oughtto11.Tom______saysorrytoTracybecausehebrokeherbike.A.shouldB.shouldC.mustn’tD.can’t12.Hesaidsuchathing______beallowedhappen.A.oughtn’ttoB.mightnotC.maynotD.needn’t13.–Oughtwetocleantheclassroomnow?--Yes,we______.A.oughtB.shouldC.mustD.can句型转换a)Weshouldtakegoodcareoftheyoungtree.(改为一般疑问句)__________we_________goodcareoftheyoungtrees?b)Yououghttoturnoffthelightswhenyouleavetheroom.(改为一般疑问句)_________I_____________________offthelightswhenIleavetheroom?c)Yououghttoputyourbikeunderthetree.(改为否定句)You_______________________________________yourbikeunderthetree.d)Thechildshoulddrinksomeorangejuice.(改为否定句)Thechild____________________________orangejuice.e)Theyshouldarriveatthestationbefore7o’clock.(就划线部分提问)____________________________________atthestation?根据要求改写句子a)Youshoulddoyourhomeworkcarefully.(用oughtto改为同义句)_______________________________________________________________________b)Tomshouldlookafterhislittlesister.(改为一般疑问句)_______________________________________________________________________c)Theyoughttohelptheirparentsdothehousework.(改为一般疑问句)________________________________________________________________________d)Ioughttobuyanewbike.(改为否定句)________________________________________________________________________e)Lucyshouldgettoschoolontime.(根据划线部分提问)________________________________________________________________________f)Shouldweeatalotofjunkfood?(作否定回答)_________________________________________________________________________g)Ihavetofinishmyhomeworkbeforegoingtobed.(改为否定句)_________________________________________________________________________