Unit 8 Have a Good Habit Part A--情态动词should的用法.ppt

1、Unit 8 Have a Good Habit Part A-情态动词should的用法,1. should表示义务或责任。 We should learn from each other. 我们应该互相帮助。 We should help the aged. 我们应该帮助老人。 You should pay your debts. 你应该还债。,2.should 表示建议或劝告。其意为“应该”： You should give up smoking. 你应该戒烟。,You should go and ask your teacher. 你应该去问问老师。,【注】有时语气较强，含有命令的意味

2、： You should leave at once. 你应该马上离开,3.should 表示推断，意为“应该”、“可能”： They should be there by now, I think. 我想现在他们都已经到了。,The concert should be great fun. 音乐会应该很有意思。,The poems should be out in a month or so. 个把月之后这些诗估计就可以出版了。,With an early start he should be here by noon. 动身得早，他中午就该到这里了。,【注】should表示推断时，语气较肯

3、定，通常是指非常可能的事(因为暗示有一定的事实依据或合乎常理)，而may, might, could等表示推测时，则语气较不肯定，尤其是might, could。,4. should 用于征求意见。 主要用于第一人称的疑问句形式： Should I open the window? 我可以打开窗户吗？ Where should I meet you tonight? 我今晚该到哪儿与你见面？ What should we do now? 我们现在该干什么呢？,5. should 表示谦逊或委婉。 通常与like, love, think, say, imagine等动词连用： I should

4、 like to know why. 我想知道这是为什么。 I should say shes over forty. 我想他有40多岁了。 I should think its too expensive. 我看这太贵了。 I should imagine it will take about three hours. 我想得花大约三个小时。,6. should表示意外或惊讶 Its strange that he should come so late. 他竟然来这么迟真是奇怪。 Im sorry that this should have happened. 我很遗憾竟然发生这种事。 Im surprised that he should say so. 他竟这样说，这使我很惊讶。,有时与why, who, how 等疑问词连用： Why should you think that way? 你为什么会那样想？ How should I know? 我怎么会知道？ Who s