Unit 8 English Week第 3 课时 语法栏目导航课 时 精 讲课 时 过 关课 后 拓 展课 时 精 讲一、should 和 ought to ought 与不定式构成谓语动词。主要用法如下： 1．表示应该做某事。如： You ought to take his advice. 你应当接受他的劝告。 2．ought+不定式的完成形式，表示本应该做某事。 They ought to have handed in the paper yesterday. 他们本应当昨天交论文。 should：表示说话人的猜测，估计，应该。 That should be Janet coming upstairs now. 正在上楼的准是珍妮特。 should (1)表示劝告或建议。He should learn how to drive the car. (2)表示预测或可能。This kind of reference book should be in the reading-room. (3)表示惊奇、愤怒、失望等感情。Why should I go? 我干吗要去？ (4)should+动词的完成形式，表示应该已经做某事。I should have thought of that. (5)should+动词的进行形式，表示应该正在做某事。 You should be reading a textbook instead of the novel. 你现在读的应当是一本教科书而不是那本小说。 句式的变化如下： should ought to shouldn’t I/You/He/She/ We/They 肯定句 和否定句 ought not to discuss it now. Should we discuss it now? Yes, we should./No, we shouldn’t. 一般疑问句 及肯否定回答 Ought we to discuss it now? Yes, we ought to. /No, we ought not to. 【小试牛刀】按照要求完成下列各题。 1．Mr. Dong should say something at the meeting.(变否定句) ________________________________________________ 2．They ought to listen to the teacher carefully in class.(变一般疑问句并进行否定回答) —______________________________________________________________________ Mr. Dong shouldn’t say anything at the meeting. Ought they to listen to the teacher carefully in class?—No, they ought not to. 3．He should give her a call.(变一般疑问句) ___________________________ 4．We should read more English books．(变同义句) _____________________________________ 5．She should buy acomputer．(对画线部分提问) _________________________...
