情态动词should--ought-to课件.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Welcome to our,class,September.29,Teaching Objectives,1.Learn common features of modal words,2.Learn to use modal words:should,ought to,3.Learn to practice orally with,should,ought,to,Teaching Contents,1.The features of modal words,2.Modal words:should,ought to,3.Oral practice,4.Homework,They can do their homework.,She can play table tennis.,He can wash clothes.,Mr.cans,Diary,They can do their homework.,She can play table tennis.,He can wash clothes.,Can I do anything?,Of course,I can do something.,什么是情态动词？,情态动词是一种本身有一定的词义，但要与动词原形一起使用，给谓语动词增添情态色彩，表示说话人对有关行为或事物的态度和看法，认为其可能、应该或必要等。,情态动词的特征,1.,不能单独做谓语，必须与其他动词一起构成谓语,2.,没有人称和数的变化,3.,情态动词后一律接动词原形,4.,具有助动词功能,情态动词,should,1.You should help your mother with the housework.,（肯定句）,你应该帮你母亲做家务,.,2.You shouldnt lie to your mother.,（否定句）,你不应该对你母亲说谎。,3.Should I wear a coat?,（一般疑问句）,Yes,you should.,是的，你应该。,No,you shouldnt.,不，你不应该。,情态动词,ought to,We can use modal words ought to to say what is best or right to do.,1.She ought to finish it by next week.,下星期她应该完成了。,2.You ought not to do it.,你不应该做此事。,3.Ought he to start now?,他现在该动身了吗？,Yes,he ought(to).,是的，该动身了。,No,he ought not(to).,不，不该动身。,should,与,ought to,的比较,1.,表示“应该，应当”等，两者可互换，只是,ought to,的语气稍重。如：,You ought to/should work harder than that.,你应当更努力地工作,2.should,强调主观看法，而,ought to,强调客观要求。如：,We ought to go and see my mother in hospital tomorrow,but I dont think we will.,我们按理应当在明天去看看住院的母亲的，但我认为我们不会去。,Practice,Who,do,sth,.,Students guard peoples safety.,.,Policemen ought to look after old people.,should,Young people work hard.,Workers study hard.,They should.,He ought to,We shouldnt.in some places.,Homework,1.,联系生活，用,should,ought to,造,10,个句子，写在作业本上。,2.,完成教材,21,页填空部分。,Thank you for,listening!,