Unit5Lesson29DNATheStoryofYou学案初中英语冀教版九年级全一册

Unit 5 Lesson 29 DNA—The Story of You
【学习目标】
1.通过基础练习,能记住并正确使用本课时的重点单词和重点短语。

2.通过有效地呈现本课时内容,能够理解课文内容并回答课后的问题。

3.通过小组合作活动,能够用英语向他人介绍自己所知道的有关DNA的知识。

【预习导学】
一、单词速记
1.脱氧核糖核酸
2.蓝图
3.一般的;普遍的
4.复杂的
5.双胞胎之一
6.重复;复述;背诵
7.模式;形式
8.确认;鉴别
9.有关的;相关的
10.孙子;外孙
11.孙女;外孙女
12.指示;说明
二、短语速记
1.in general
2.except for
3.bee sick
4.be able to
5.例如
6.和……相同的……
7.与……相关
8.数十亿计的;大量
三、想一想
1.文中介绍了什么是DNA?
______________________________________________________________
2.科学家们可以通过你的DNA鉴别什么?
______________________________________________________________
【答案】
一、
1.DNA
2.blueprint
3.general 4 plex 5.twin
6.repeat
7.pattern
8.identify
9.related10.grandson11.granddaughter12.instruction 二、
1.一般而言;通常
2.除……之外
3.生病
4.会;能
5.for example
6.the same...as
7.be related to
8.billions of
三、
1.DNA is the blueprint of life.
2.From your DNA, scientists can identify not only you, but also people who are related to you.
【合作探究】
任务驱动一单词、短语大闯关
1.齐读本课重点单词和短语。

2.用方框内所给单词的适当形式填空。

(1)Lucy and Lily are . They look the same.
(2)Read the before using the new phone.
(3)These difficulties are among people of his age.
(4)I can't follow you, Tony. Please the sentence.
(5)The little boy is Mr. King's .
3.Show Let's Do It! 2. Fill in the blanks with the phrases in the box.
(1)Your homework is quite good a few spelling mistakes.
(2)the young the old like pop music.
(3)Kate's hair is colour her sister's.
(4), women live longer than men.
(5)many difficulties remain, we can overe them.
(6)Is wealth happiness?
任务驱动二听力训练
1.Listen to the lesson and fill in the blanks.
(1)for some twins, every living thing has its own unique DNA.
(2)Some problems can be caused by problems in your DNA.
(3)Your finger has the DNA as your hair.
(4)From your DNA, can identify not only you, but also people who are related to you.
(5)DNA is one of the amazing things on the earth!
2.Show Let's Do It! 1. Read the lesson and answer the questions.
3.反复听录音并跟读。

熟记课文,掌握文章各段的大意,并借此来复述课文,训练口语表达。

任务驱动三小组活动
1.Show Let's Do It! 3. plete the lesson with the sentences in the box.
2.Discussion.
Is it a good idea to change the DNA of the food we eat?
Divide the students into two groups.
One group support it is a good idea to change the DNA of the food we eat.
The other group say something about the disadvantages of changing the DNA of the food.
【答案】
任务驱动一
2.(1)twins(2)instructions(3)general(4)repeat
(5)grandson
3.(1)except for
(2)Not only but also
(3)the same
(4)In General
(5)Even if
(6)related to
任务驱动二
1.(1)Except(2)health(3)same(4)scientists(5)most
【知识超市】
[命题点]Except for some twins, every living thing has its own unique DNA。

除了同卵双胞胎之外, 每个生物都有自己独特的DNA.
短语except for意为“除……之外”。

如:
The city is good except for the weather. 除天气外,这座城市还不错。

辨析:except for、except、besides和but
except 意为“除了”, 强调不在其中,指从同类事物的总体中除去一部分
except
意为“除了”, 表示对主要部分的肯定以及对局部的否定
for
besides 意为“除了……之外(还有)”,后面接名词、代词、或动名词,但不能接从句意为“除……外”, 强调不在其中,与except可互换,多与no、nobody、who、where、but
all等连用
对点自测
根据汉语意思完成句子。

1.他是个好人,除了有点脾气坏。

He is a good man a bad temper.
2.盒子里除了一张卡片之外什么也没有。

There is nothing a card in the box.
3.除了化学之外,Jim还喜欢数学。

Jim likes maths chemistry.
【答案】
1.except for
2.but
3.besides。