Grammar情态动词2.pptVIP

Grammar : modal情态动词 had better should ought to 1had better 最好做…. 1)表示建议，语气比较委婉 she had better see a doctor if she get any worse. 如果她病情加重，最好看医生。 2) 表示威胁，语气重 不客气 You had better keep your mouth shut about this . 关于这件事，你最好闭嘴。 You had better not be late next time. 你最好下次别迟到。 2. should 1) 表示“应该， 应当”，指主观上有责任，有必要这样做，并含有这样做更恰当 You should pay more respect to the old. 你应该对老人更尊重。 学生应该遵从老师的建议。 Students should follow teachers’ advice. 2)表示对将来的推测 I should arrive home in ten minutes. 我应该十分钟以后到家。 玛丽现在应该到家了。 Mary should be here now. 3)表示说话人的某种情感，如 惊奇，愤怒， 遗憾， 意外等 The gentleman should be so rude. 这位绅士竟如此的粗鲁。 4) 表示对过去的事情抱怨和责备，表示虚拟 I shouldn’t have gone with her yesterday. 昨天我不应该和他一起去。 你应该早较上你的作业。 You should have handed in your homework earlier. 3 ought to 1) 应该 比should语气强，指客观上有责任和义务干某事，语气更严峻，更客观。 He ought to pay the rent on time. 你应该按时交房租。 2) ought to have done 表虚拟 表过去应该干儿没干的事情 We ought to have started the work earlier. 我么应该早一点开始工作。 3)表可能性 Mary ought to be home by now. 玛丽现在应该到家了。 There is a fine sunset. It ought to be a fine day. 今天有晚霞，明天应该是个好天气。 ? * *