八年级英语上册Unit2KeepingHealthyTopic1YoushouldbrushyourteethtwiceadaySectionA情态动词should的用法课件新版仁爱版.ppt

UNIT 2 Keeping Healthy TOPIC 1 You should brush your teeth twice a day Section A--情情态动词should的用法的用法 1. should do “表现在，表现在，可将来可将来”should have done “ 表过去表过去”应该应该We should learn about the computer and make full use of it. 我们应该了解计算机并加以充分利用我们应该了解计算机并加以充分利用You should listen to the doctor’s advice. 你应当听大夫的话你应当听大夫的话 I should have finished my work.我应该做完我的工作实际上还没有做完）我应该做完我的工作实际上还没有做完）mustn’t, shouldn’thad better notThey shouldn’t left so soon.表禁止表禁止You should do what your parents tell you.I often see lights in that empty house. Do you think I should report it to the police?should, musthave to表义务表义务( (应该应该) )有时态变化有时态变化---I’ll tell Mary about her new job tomorrow. ---You should have told her last week.表示与过去事实的相反表示与过去事实的相反, 意为意为 “本应该本应该……”2. 在在It is/was right that...类句型的类句型的that从句中，从句中，以虚拟语气表示以虚拟语气表示“应该如此应该如此”或或“不合理不合理”、、“难以置信难以置信”、、“不该如此不该如此”等意思（事实并等意思（事实并非如愿）。

例如：非如愿）例如：It is/was no wonder that he should have succeeded. (表过去表过去) 难怪他会成功难怪他会成功It is/was a pity that he should have failed. （表过去）（表过去） 真可惜他失败了真可惜他失败了It is not right that one should speak ill of others. (表现在及未来表现在及未来) 说别人的坏话是不对的说别人的坏话是不对的It is strange that you should say so . (表现在表现在)你这样说话真奇怪呀！你这样说话真奇怪呀！ 这一句型还可用以下这些词来代替这一句型还可用以下这些词来代替right等词natural, necessary, strange, important, advisable, better, desirable(合意的合意的), essential, good, proper, well, urgent, wrong, funny, pitiful, a thousand pities, regrettable(令人惋惜的令人惋惜的)，， to be regretted（令人惋惜的）（令人惋惜的）, surprising(令人吃惊的令人吃惊的)类似句型还有类似句型还有：（以下句中：（以下句中should意为意为“竟竟然，居然会然，居然会”））I am sorry that I should have spoken so rudely. (表过去表过去) 我很抱歉我竟然说话那么粗鲁。

我很抱歉我竟然说话那么粗鲁What are you(I am suprised) that you should have so insulted our teacher?(表过去表过去) 你是谁竟然对我们老师如此无礼？你是谁竟然对我们老师如此无礼？3. 表明显的结果或合理的推论，且所期待的事表明显的结果或合理的推论，且所期待的事几乎是事实不是虚拟语气例如：几乎是事实不是虚拟语气例如：Mary took dancing dessons for years; she should be an excellent dancer.玛丽学了几年的舞蹈，她该是位很优秀的舞蹈家玛丽学了几年的舞蹈，她该是位很优秀的舞蹈家It is three o’clock;the football game should begin soon.已是已是3点钟了，足球比赛开始了点钟了，足球比赛开始了4. 在疑问句中表示惊讶、不合理、难以置信或不在疑问句中表示惊讶、不合理、难以置信或不应说的事例如：应说的事例如：Why should I go? 我干嘛要去？（不满）我干嘛要去？（不满）Why should he publish such a book? 为何他竟会出版这种书？为何他竟会出版这种书？Why should you be sorry about the news? 你为何对这消息感到难过？你为何对这消息感到难过？Should he do such a thing? 他会做这种事吗？他会做这种事吗？How should I know? 我怎么会知道？我怎么会知道？Who should write it but himself? 不是他自己还有谁会写呢？不是他自己还有谁会写呢？5. 带带should的习惯的习惯用语。

用语 a. I should say (我敢说我敢说) he is over forty.b. She is over thirty, I should think.(我相信我相信)6. Should 用于虚拟语气用于虚拟语气 You can’t imagine that a well-behaved gentleman should be so rude to a lady.表示吃惊表示吃惊, 意为意为 “竟然会竟然会”1. In case I _____, I would try again. A. will fail 　　　　B. would miss 　　　　 C. should fail D. shall miss 2. He asked me if he _____ open the window. A. shall B. would C. will D. should 3. Everyone _____ do his best to make the world safe and clean. A. can B. may C. should D. had todidn’t/needn’t to do本不需要做而实际上也没做本不需要做而实际上也没做should have done本应该做而实际上没做本应该做而实际上没做 (责备责备)1. It was really very dangerous; you ______ him seriously. A. might have injured B. could injure C. should have injured D. must injurePractice2. — “________ you mind my opening the window?” — “Not at all.” A. Shall B. Should C. Will D. Would3. I didn’t hear the phone. I ______ asleep. A. must be B. must have been C. should have D. could have been4. You _______ pay more attention to your spelling next time. A. would B. should C. will D. shall5. The teacher told the students that they ________ keep silent in class all the time. A. ought to not B. ought not to C. ought not to have D. can’t6. A computer _______ think for itself; it _______ be told what to do. A. may not, must B. mustn’t, might C. shouldn’t, could D. can’t, must been7. You ______ me about it earlier, but you didn’t. A. should have told B. would have told C. must have told D. should tell。