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Unit 4 Life on Mars第二课时Reading (1)目标导航类别课时要点重点单词polluted adj.被污染的rapid adj.快的,迅速的increase n.增加passenger n.乘客uncomfortable adj.使人不舒服的;不舒适的tasty adj.味道好的specially adv.专门地,特地compare vt.& vi.比较challenging adj.挑战性的rapidly adv.快地,迅速地重点短语at present 现在float off 漂浮in some ways 在某些方面be full of 充满make friends with 交朋友tie.to. 把和捆起来get lost 迷路make a list of 列的清单重点句型1.At present,our spacecraft are too slow to carry large numbers of passengers to Mars.目前,我们的宇宙飞船太慢了,无法运送大批的乘客去火星。2.People would have to wear boots that are specially designed to prevent themselves from floating off into space.人们必须穿上特制的靴子以阻止自己飘入太空。3.The gravity on Mars is only about three-eighths of that on the Earth.火星上的重力大约只有地球上的八分之三。4.Compared with life on the Earth,life on Mars would be better in some ways.与地球上的生活相比,火星上的生活在某些方面要更好些。5.Every student would have a computer at home connected to an interplanetary network.每个学生家里都会有一台电脑与星际网络连接。教学重点1.让学生掌握基本的四会单词、短语及句型。2.让学生了解未来在另一个行星上生活的情境。教学难点1.让学生识别并列出地球生活与火星生活的不同之处。2.培养学生的阅读技巧,让学生掌握文章内容,了解文章的框架和结构。教学过程预习指导一、方法指导预习Page 5253的文章,并预习课后新单词,自主背默。二、预习检测.汉译英1.现在at present2.乘宇宙飞船in spacecraft3.漂浮float away4.在某些方面in some ways5.使某人做某事make sb do sth6.充满be full of7.总数the total number of8.交朋友make friends with9.飞到fly to10.把A和B捆起来tie A to B11.迷路get lost12.列的清单make a list of.根据句意及汉语提示完成单词1.There are thousands of stars and planets(行星) in space.2.He came here specially(专门地) to get a grammar book.3.With the rapid(快速的) development of science and technology,our life is more and more convenient.4.More and more passengers(乘客) would like to take the underground instead of driving cars.5.Some actions must be taken to control the increase(增加) of the population in the world.课堂教学Step 1 情景导入老师利用图片呈现本课新单词与短语,帮助学生掌握单词释义。Step 2 阅读前1.快速浏览Part A的文章,讨论下面的问题。Our Earth is becoming more and more crowded and polluted,so where can we stay?2.小组合作,完成Page 54中Part B1和Part B2的练习。Step 3 阅读中1.听Part A的录音,然后快速阅读,小组合作,回答下列问题。(1)Why do people need to move to Mars?The Earth is becoming more and more crowded and polluted.(2)How long does it take to fly to Mars at present?It would take months.(3)What would the flight to Mars be like by the year 2100?The journey might take about 20 minutes in spacecraft that travel at the speed of light and the journey might be uncomfortable.(4)What would food on Mars be like?Food would be in the form of pills and would not be so tasty.(5)Where might people live on Mars?People might live in houses with huge comfortable rooms.(6)What would schools be like on Mars?There would be online schools with “e-teachers.”(7)What does the writer think of life on Mars?Life on Mars would be interesting as well as challenging.2.再次快速阅读,划分文章的篇章结构,找出各段的关键词。3.老师提出问题让学生进一步思考。参考示例T:What does the writer think of the life on Mars?S:He thinks it would be interesting as well as challenging.T:Do you agree with him?Why or why not?Step 4 阅读后1.让学生自由朗读短文。2.小组合作,讨论归纳火星生活的优缺点。3.根据关键词,复述课文。限时训练根据句意用所给词的适当形式填空1.There is less air pollution(pollute) in town than in the city.2.We should keep water from being(be) polluted.3.By next week,we will/are going to visit(visit) three places of interest.4.The world as we know is going to change rapidly(rapid).5.Compared(compare) with when we were at school,children in primary school seem to learn more interesting things.板书设计1.large numbers of表示“许多;大量的”,相当于a large number of。a number of意为“许多”,修饰可数名词复数。作主语时,谓语动词用复数形式。其中的number前可用large,small等词修饰,表示程度。the number of意为“的数量”,后跟复数名词,作主语时,谓语动词要用单数形式。2.three-eighths意为“八分之三”。分数与名词搭配时,之间常用介词of,即“分数 + of + 名词”结构。作主语时,谓语动词的单复数根据of后面的名词而定,如果名词是复数,谓语动词用复数形式;如果名词是单数或不可数名词,谓语动词用单数形式。英语中分数表达法:分子是基数词,分母是序数词,如果分子大于1,分母用复数形式,在分子与分母之间可加连字符也可不加连字符。3.辨析especially和specially。(1)especially是副词,意为“尤其,特别”,通常用来对前面所述的事情进行进一步的说明或补充。(2)specially是副词,意为“专门地;特地”,强调唯一目的。4.prevent作动词,意为“防止;阻止”。prevent.from.意为“防止做”。注意:prevent/stop/keep sb from doing sth,意为“阻止某人做某事”,其中keep sb from doing sth中的from不能省略,stop/prevent中的可以省略。教学反思本课时主要以阅读和讨论为主。老师提出问题,引导学生有针对性地阅读课文,提高了他们收集信息的能力。另外,在实际的英语教学中,老师利用其他相关学科的知识来加深学生对英语知识的掌握,并且让学生自己总结,进一步培养其学习和归纳能力的方法。
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