Should与Ought to的讲解和练习.pdf

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1、ShouldShould 与与 Ought toOught toI.I.复习复习1.Some people can live without meat.2.May I use the phone please,Mr.White?3.Could you tell me something about the book?4.You must not smoke here.5.What flavor would you like,chocolate or strawberry?6.We should put rubbish in the bin.7.She shouldnt discuss it.8

2、.Should we discuss it now?/Ought we to discuss it now?-Yes,we should/ought to.-No,weshouldnt/ought not to.9.The students ought not to sleep in the class.10.Tom ought to hand in his homework on time.II.II.二者区别：二者区别：ShouldShould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”表示某动作不一定要做Ought

3、 toOught to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”.表示做某事一定是错误的意思意思否定否定虚拟语态虚拟语态时态时态肯定句肯定句否定句否定句一般疑问句一般疑问句简略回答简略回答ShouldShouldsb.should do sth.sb.should not do sth.Should sb.do sth.?Yes,sb.should do sth.No,sb.should not/shouldnt do sth.Ought toOught tosb.ought to do sth.sb.ought not

4、 to do sth.Ought sb.to do sth.?Yes,sb.ought to do sth.No,sb.ought not/oughtnt to do sth.1shouldshould 和和ought toought to 在用法上要注意以下在用法上要注意以下 3 3 点：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。ought toought to 是唯一一个可加是唯一一个可加 toto 的情态动词的情态动词!ought toought to 具体用法具体用法:1.(表示义务、责任等)应当,应该You ought to work h

5、arder than that.2.(表示劝告、建议等)应该,You dont look well.You ought to go to see thedoctor.3.(表示猜测、期望)总应该，理应It ought to be a fine day tomorrow morning.4.“ought to+have+过去分词”表示过去应做某事而实际未做You ought to have told me that(but you didnt).这时 ought to 和 should 可以互换使用。ShouldShould 具体用法具体用法:1.表义务 意为”应该”You should do

6、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 spelledSymthe,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

7、 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.2III.III.练习练习单项选择单项选择1.We _ help the people in need.A.can B.ought to C.should D.could2.One _ cross the street against the red light.A.oug

8、ht not B.ought to not C.shouldnt toD.oughtnt to3.I missed the train.You _ me that the timetable had changed.A.should to tell B.should have toldC.ought have to tell D.ought have told4.We _ throw the rubbish into the bin.A.shouldB.ought to C.mayD.would5.Parents _ raise their children until they are 18

9、.A.should B.ought toC.may D.would6.They _ discuss it now.A.ought to notB.not ought toC.dont ought to D.ought not to7._ he _ his parents about this problem?A.Should,listens B.Ought,listens to C.Should,listen to D.Ought,listen to8.He _ here on time.A.should came B.should comeC.should comesD.should com

10、ing9.You _ buy the ticket before getting on the train.A.ought B.should C.mustntD.cant10.To protect our eyes,we _ keep enough distance from books when we read them.A.shouldnt B.ought notC.ought not to D.ought to11.Tom _ say sorry to Tracy because he broke her bike.A.should B.shouldC.mustnt D.cant12.H

11、e said such a thing _ be allowed happen.A.oughtnt toB.might notC.may notD.neednt13.Ought we to clean the classroom now?-Yes,we _.A.oughtB.shouldC.must D.can3句型转换句型转换a)We should take good care of the young tree.(改为一般疑问句)_ we _ good care of the young trees?b)You ought to turn off the lights when you l

12、eave the room.(改为一般疑问句)_ I _ _ off the lights when I leave the room?c)You ought to put your bike under the tree.(改为否定句)You _ _ _ _ your bike under the tree.d)The child should drink some orange juice.(改为否定句)The child _ _ _ orange juice.e)They should arrive at the station before 7 oclock.(就划线部分提问)_ _

13、_ _ at the station?根据要求改写句子根据要求改写句子a)You should do your homework carefully.(用 ought to 改为同义句)_b)Tom should look after his little sister.(改为一般疑问句)_c)They ought to help their parents do the housework.(改为一般疑问句)_d)I ought to buy a new bike.(改为否定句)_e)Lucy should get to school on time.(根据划线部分提问)_f)Should we eat a lot of junk food?(作否定回答)_g)I have to finish my homework before going to bed.(改为否定句)_4