外研版高中英语(必修4)(精)

1、外研版高中英语(必修 4)Module 6Un explai ned Mysteries of the Natural World语法课(1)唐岚 天津五十五中学教学内容：Cultural Corner，Grammar -may have/ might have，教学目标：1.了解情态动词may have/ might have的用法2能够表达可能性的推测教学方法：发现法；练习法；归纳法教学原则：1通过学生仔细观察例句，发现含义与特点，有利于学生的自主学习。2通过小组讨论学习，能够使学生在学习中互相帮助，有利于学生的合作和探究式学 习。教学过程：第一部分：Revision and Checki

2、ng the homeworkStep 1核对书上第101页练习12,14第二部分：Cultural Corner:Step 1听录音，读课文，回答问题。第三部分：GrammarStep1对cultural corner中的句子：But in China, the idea of the dragon may have come from thealligatora shy an imal which lives in rivers.进行翻译。Step 2看听力原文，把含有may have/ might have的句子找出，并翻译。Pres: Why did dino saurs sudde

3、nly disappear?Dr: Well, probably the most widely accepted theory is the meteorite on e.Pres: You mean the earth was hit by a meteorite from space.Dr: Yes, thatright.Pres: And the dinosaurs died immediately?Dr: Not exactly, not all of them. The meteorite may have hit the earth with such force that it

4、 created ahuge dust cloud, which stopped the sun light from getti ng through. so there was no light, no heat,and no food.Pres: But other ani mals survived?Dr: Yes, smaller creatures like mammals, which may have survived because they ate seeds andnuts.Pres: What other theories are there?Dr: Lots. The

5、 dinosaurs may have stopped evolving, and been unable to adapt to changes in theclimate. Or they might have killed each other.Pres: Is that possible?Dr: Oh yes. They spent a lot of time fighting. There again, it might have been volcanic eruption, not ameteorite, which sent up clouds of dust and cut

6、off the light. One very recent theory says they diedof cancer.Pres: Cancer? You mean the dinosaurs died out because they fell ill?Dr: Yes. As a result of radiati on coming from a dying star somewhere in our galaxyPres: That sounds fan tastic.Dr: Well, I think itunlikely, but itnot impossible.Pres: W

7、hich theory do you believe?Dr: I go for the meteorite. I thi nk itthe most likely one. And in fact there is a huge crater in theCaribbean sea, off the coast of Mexico, where the meteorite may have landedStep 3总结may/ might have done表示对过去可能性的推测。并完成全部练习。第四部分：FunctionStep 1让学生看function练习1中的句子，总结谓语动词的构成。

8、并回答练习1。may/ might +动词原型be un likely to doStep 2完成练习2Step 3总结may/might have done与may/ might do的区别。1.对于现在或将来状态的推测用may/might do2.对于过去动作或事实的推测用may/might have done3.might的可能性比may小第五部分：Homework1.书上P97,练习1,2,3教学反思：本节课完成了之前设定的教学目标，学生对于may/might have done和may/ might do的用法有了一定的了解。通过自己翻译总结归纳，使学生的知识，更加系统有条理，并且培养了学生自己学习的能力。并且通过练习的方法，加强了训练。教学点评：1、 在本节语法课上，唐岚老师让学生通过其精心设计的每一个教学步骤