牛津英语8B语法专项练习(七).docVIP

牛津英语8B语法专项练习（七） should ，ought to和一、掌握基本用法 had better，should，ought to 含义及语气有所不同，请看下表： should和ought to均为提建议型情态动词常用来劝告别人去做某事，“应该”没有人称和数的变化，后接动词原形可以表示现在、将来或过去将来，由时间状语或上下文决定。例如： We ought to be more careful with our homework.我们应当更加认真地做作业。You should follow Mr. Wang’s advice. 你应当听王老师的话。I ought to do my homework now.我应该现在就做作业。 What’s wrong with my answer? It should be 62,not 26. 我的答案出了什么错误？它应该是62，不是26。 1、陈述句肯定形式： I/You/He /She/We/They should discuss it. ought to discuss it. 否定形式： I/You/He /She/We/They should not(shouldn’t) discuss it. ought not (oughtn’t) to discuss it. 2、一般疑问句： Should We discuss it now? Ought we to 简略回答： Yes , we should /ought to . No, we shouldn’t /ought not (oughtn’t) to. 3、反意疑问句You should study hard, shouldnt you? 你应该认真学习，是吗？You ought to study hard, oughtnt you? He shouldn’t speak in class, should he? 你上课不应该讲话，是吗？He oughtnt to speak in class, ought he? 三、should和ought to +have done （一）should/ought to have done 意为本来应做但实际没有做，表达遗憾的感情色彩。 例：There was a lot of fun at yesterdays party. You ought to have come, but why didnt you? （二）should’t / oughtnt to have done，意为本来不应做但实际已做，表达遗憾的感情色彩。 例：I was really anxious about you. You shouldnt have left home without a word. ought to +be doing ，表示“应该在（立即）……”例如：You oughtn’t to be talking so much.你不应当说这么多话。 They felt they ought to be doing something.他们感到他们应该做点什么事。　had better表示最好had better 作为情态动词，它只有一种形式，它后面要跟动词原形。I/You/He /She/We/They had better go to bed early. I/You/He /She/We/They’d better go to bed early.(缩写) 1、陈述句肯定形式：had better do sth You had better go there at once. 你最好立即去那里。had better not do sthYou had better not start at this time. 此时你最好别出发。Had he better start early at once? 他最好立即出发吗？Yes ,he had./ No, he hadn’t. 3、反义疑问句： You had better not go home, had you? 你最好别回家，是吗？　 She had better water the flowers as soon as possible，hadn’t she？她最好尽快给花浇水，不是吗？　　’t, ought, oughtn’t填空： 1. I’m getting fat. I to eat too much. 2. Mary is not feeling well. S