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教学课题 Lesson 28　The Study of Living Things 备注
教学目标 【知识目标】 Important words:biology,butterfly,migrate,fantastic,completely,grandchild,female,chemical,puzzling Important phrases:grow up,draw one's attention,as many as...,leave for,cut down Important sentences: (1)Fantastic facts about the butterfly have been drawing Dr.Taylor's attention. (2)Here,as many as 230 million butterflies spend the winter. (3)The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north. (4)But in Mexico,people cut down the trees that the butterflies need to rest on because they want more land for farming. (5)This is both puzzling and interesting for many scientists.
续表
【能力目标】 了解蝴蝶的生活习性,增强学习兴趣,向他人介绍自己所参加的保护生物的活动。 【情感目标】 能够表达自己对大自然奥秘的敬畏之情。
教学 重难点 重点:1.掌握本课重点单词及短语; 2.定语从句。 难点:1.定语从句;2.用英语表达大自然的一些奥秘。
教学过程
◆Step 1　Lead in Show students the pictures on PPT. T:Do you know him S:Yes.He is Darwin. T:Well,he's a British biologist.Do you like biology S:Yes,we do! T:Do you like the butterflies S:Yes.They are very beautiful! T:Do you know this kind of butterfly (见课件) ◆Step 2　Think about e to “THINK ABOUT IT”. 1.Would you like to be a biologist when you grow up Why or why not 2.What mysteries of nature do you know about 设计意图:通过询问学生本课相关的人物以及实物图片,实现师生互动,导入本课,渲染课堂气氛,激发学生的学习兴趣。 与学生简单对话,进入本课主题。
◆Step 3　Show learning aims. Let the students read the learning aims together.(见课件) ◆Step 4　Learn the new words and expressions. 设计意图:让学生在学习本课时之前,了解本节课的学习目标以及需掌握的单词短语。
◆Step 5　Listening Listen to the lesson and finish the exercises. 1.In the United States and Mexico,farmers use chemicals that kill milkweed.(T or F) 2.Do the females lay eggs on only one plant 　　　　　　　　　　　　　　　　　. 3.What does Dr.Chip Taylor study 　　　　　　　　　　　　　　　　　. 4.Here,as many as 　　　　　 butterflies spend the winter. 5.In Mexico,the butterflies always return to the same small piece of forest,which is only 　　　　　. 【Keys】1.F 2.Yes,they do. 3.He studies one kind of North American butterfly. 4.230 million 5.20 kilometres wide 设计意图:通过听磁带做练习,提高听力水平,并大体了解课文内容。
续表
◆Step 6　Reading Read the lesson and complete the table. (见课件) 【Keys】return/fly;spend;lay;rest;kill;find 设计意图:要求学生快速地把握课文信息,同时也锻炼了学生们的口语表达能力。问题更加细化,可以更深层次地挖掘文章内容的细节。
◆Step 7　Language points 1.have been doing sth.是现在完成进行时,意为“一直在做某事”,表示从过去某时开始的某个动作或状态一直延续到现在,而且还在进行,常常表示动作的延续性、重复性以及感彩等。 2.as...as...意为“与……一样……”,两个as之间可加形容词或副词的原级;也可加“many+复数名词”“much+不可数名词”或“形容词+a/an+单数名词”,还可以在as...as...前加twice,half等词表示前后者倍数或分数关系。as...as的否定形式为not as/so...as...。 3.spend为及物动词,意为“度过,花(钱/时间)”,常用于固定结构: spend time (in) doing sth./spend money (on) doing sth.花费时间/金钱做某事; spend time/money on sth.在某物上花费时间/钱; spend time with sb.和某人一起度过时光。 句子的主语应为人,spend的过去式和过去分词都是spent。 4....that return to the south是定语从句。定语从句是指在句中作定语的从句。 先行词:是被定语从句所修饰的词 (通常是名词或代词)。 关系词的作用: (1)引导定语从句 (2)在从句中替代先行词,在定语从句中充当一定的成分,通常是主语或宾语,作宾语时常可以省略。 定语从句:关系词(eg.that,which,who)+从句 5.特殊情况下,只能用that引导的定语从句: (1)先行词为all,everything,nothing,something,anything,little,much等不定代词时; (2)先行词被all,little,much,every,no等修饰时; (3)先行词被序数词或形容词最高级修饰时; (4)先行词被the only,the very,the same,the last修饰时; (5)先行词为人和物的组合; (6)主句是who/which开头的特殊疑问句。 6.when to fly south意为“什么时间飞往南方”,是“特殊疑问词+动词不定式”结构。“疑问词+动词不定式”结构实质上是一个名词性结构,它可以改为一个宾语从句,此时从句与主句的主语是一致的。 7.both...and...意为“……和……都”,用于连接两个并列成分。 both...and...连接两个并列成分作主语时,谓语动词使用复数形式。both...and...的同义词组为not only...but(also)...,意为“不仅……而且……”,反义词组为neither...nor...,意为“既不……也不……”。 设计意图:让学生掌握本课重要知识点。
◆Step 8　Practice Show “Let's Do It!No.2”. Join the sentences to make attributive clauses.
续表
Example: We did some experiments yesterday.The experiments were fantastic. 　The experiments that we did yesterday were fantastic.　 1.I asked him to mail the letter.I wrote the letter to my cousin. 2.Yesterday I met a boy.The boy is a new member in our art club. 3.Mary was carrying a bag.The bag cost her a lot of money. 4.Football is a team sport.Football is popular all over the world. 【Keys】 1.I asked him to mail the letter(which/that) I wrote to my cousin. 2.Yesterday I met a boy who/that is a new member in our art club. 3.Mary was carrying a bag which/that cost her a lot of money. 4.Football is a team sport which/that is popular all over the world. 设计意图:通过练习,让学生熟练掌握并运用定语从句。
◆Blackboard design Lesson 28 重点单词:biology,butterfly,migrate,fantastic,completely,grandchild,female,chemical,puzzling 重点词组:grow up,draw one's attention,as many as...,leave for,cut down 重点句式: (1)Fantastic facts about the butterfly have been drawing Dr.Taylor's attention. (2)Here,as many as 230 million butterflies spend the winter. (3)The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north. (4)But in Mexico,people cut down the trees that the butterflies need to rest on because they want more land for farming. (5)This is both puzzling and interesting for many scientists.
◆Step 9　Exercises Ⅰ.用括号内所给单词的适当形式填空 1.Dr.Chip Taylor is a 　　　(biology). 2.This crossword 　　　(puzzling) is hard to do. 3.My mother took some 　　　(freeze) meat from the fridge. 4.He has 　　　(complete) forgotten the place. 5.My black hen 　　　(lay) an egg yesterday. Ⅱ.请给下列的定语从句补充引导词 1.Who is the girl 　　　 talked to you yesterday. 2.Look at the photos 　　　 I took on my trip. 3.It successfully shows the rich culture 　　　 makes Beijing so famous. 4.The photo 　　　 we liked best was taken by Zhao Min. 5.His father is the person 　　　 will be most unhappy. 6.Tom is the boy 　　　 we saw in the shop. 【Keys】Ⅰ.1.biologist　2.puzzle　3.frozen　4.completely　5.laid Ⅱ.1.that/who　2.that/which　3.that/which　4.that/which　5.that/who 6.that/who/whom 设计意图:通过练习,让学生巩固本课时知识点。
◆Step 10　Homework 1.Preview the words and expressions in Lesson 29. 2.Research and write a report about an animal or insect that you think is fantastic.Include a drawing or image of the animal or insect.
续表
教学反思

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