Should与Ought to的讲解和练习.doc

Should与Ought toI. 复习1.Somepeoplecanlivewithoutmeat.2.MayIusethephoneplease,Mr.White?3.Couldyoutellmesomethingaboutthebook?4.Youmustnotsmokehere.5.Whatflavorwouldyoulike,chocolateorstrawberry?6.Weshouldputrubbishinthebin.7.Sheshouldntdiscussit.8.Shouldwediscussitnow?/Oughtwetodiscussitnow?-Yes,weshould/oughtto.-No,weshouldnt/oughtnotto.9.Thestudentsoughtnottosleepintheclass.10.Tomoughttohandinhishomeworkontime.II. 二者区别：ShouldOught to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ShouldOught to肯定句sb. should do sth.sb. ought to do sth.否定句sb. should not do sth.sb. ought not to do sth.一般疑问句Should sb. do sth.?Ought sb. to do sth.?简略回答Yes, sb. should do sth.No, sb. should not / shouldnt do sth.Yes, sb. ought to do sth.No, sb. ought not /oughtnt to do sth.should和 ought to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,Youdontlookwell.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(butyoudidnt).这时oughtto和should可以互换使用。Should具体用法:1. 表义务 意为”应该”You should do what your parents tell you.He shouldnt stay up so late.2. 表温和的建议或指正This name is wrong; it should be spelled Symthe, not Smith.3. 表期待.意为”可能”That should be easy.She should be here in a minute.4. 可用于完成时,完成时表示过去应该做而未做的事情At the age of thirty-five I should have understood.5. 用于第一人称疑问句询问对方意愿, 但与其较委婉温和Should I open the window?6. 表惊讶等感情Im surprised that he should say so.How should I know?7. 表委婉语气, 常与say, think 等动词连用I should say he is over thirty.I should think it is a good film.III. 练习单项选择1.We_helpthepeopleinneed.A.can B.oughtto C.should D.could2.One_crossthestreetagainsttheredlight.A.oughtnotB.oughttonotC.shouldntto D.oughtntto3.Imissedthetrain.You_methatthetimetablehadchanged.A.shouldtotell B.shouldhavetold C.oughthavetotell D.oughthavetold4.We_throwtherubbishintothebin.A.should B.oughtto C.may D.would5.Parents_raisetheirchildrenuntiltheyare18.A.should B.oughtto C.may D.would6.They_discussitnow.A.oughttonot B.notoughtto C.dontoughtto D.oughtnotto7._he_hisparentsaboutthisproblem?A.Should,listens B.Ought,listenstoC.Should,listento D.Ought,listento8.He_hereontime.A.shouldcame B.shouldcome C.shouldcomes D.shouldcoming9.You_buytheticketbeforegettingonthetrain.A.ought B.should C.mustnt D.cant10. Toprotectoureyes,we_keepenoughdistancefrombookswhenwereadthem.A.shouldnt B.oughtnot C.oughtnottoD.oughtto11.Tom_saysorrytoTracybecausehebrokeherbike.A.should B.should C.mustnt D.cant12.Hesaidsuchathing_beallowedhappen.A.oughtntto B.mightnot C.maynot D.neednt13.Oughtwetocleantheclassroomnow?-Yes,we_.A.ought B.should C.must D.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)Theyshouldarriveatthestationbefore7oclock.(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)Theyoughttohelptheirparentsdothehous