高中英语 Unit 2 Healthy eating Section Ⅳ Grammar导学案 新人教版必修3-新人教版高一必修3英语学案

Section Ⅳ Grammar情态动词(Ⅱ)1．(教材 P10)By now his restaurant ought to be full of people. But not today!2．(教材 P10)Something terrible must have happened if Li Chang was not coming to eat in his restaurant as he always did.3．(教材 P14)May I ask what you were doing in my restaurant the other day?4．(教材 P15)Perhaps we ought to combine our ideas and provide a balanced menu with food full of energy and fibre.ought to 的用法1．表示出于义务、责任、道义等方面的要求而该做某事。◆To hand in the paper in time, we ought to have a busy schedule. 为了及时交上论文，我们的日程应该紧一点。◆To build up our body, we ought to do enough exercise, such as running, swimming and hiking.为了增强体质，我们应该做足够的运动，比如跑步、游泳和远足。2．表示说话人的猜测。◆She ought to succeed, because she tries hard enough.她应该能成功，因为她确实够努力。◆The two teams are equal in ability, so the game between them ought to be a close one. 这两队能力相当，因此他们之间的比赛应该是一场势均力敌的比赛。3．ought to 的否定式是在 ought 后加 not，疑问式是将 ought 提前。◆If you make a promise, you should keep it and you ought not to break a promise.如果你做出了承诺，你就应该遵守诺言，不应该食言。◆—Ought I to write to say thank you?——我应该写封感谢信吗？—Yes, I think you ought (to)．——对，我认为你应该写。【即时演练 1】——句型转换You ought to put your watch forward by ten minutes.①→Ought you to put your watch forward by ten minutes ？ (变为疑问句)②→You ought not to put your watch forward by ten minutes.(变为否定句)need 的用法need 作情态动词时，后跟动词原形，表示“需要，有必要”，无人称和数的变化，多用于否定句、疑问句或条件句中。1◆(2018·全国卷Ⅰ)If you are time poor, you need run for only half the time to get the same benefits as other sports. 如果你时间不充裕，你只需要...