冀教版英语九年级全一册 Unit 5 Look into Science Lesson 28 课件(28张）

(共28张PPT)
Unit 5 Look into Science
Lesson 28
学习目标
objectives
To learn some new words:
Biology, fantastic, butterfly……
To understand the passage.
To learn Attributive clause.
Lead in
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
Think about it
生物
蝴蝶
迁徙; 移居
奇异的
完全地
孙子(女)；外孙(女)
雌性
马利筋（一种植物）
化学物质
令人费解的
biology n.
butterfly n.
migrate v.
fantastic adj.
completely adv.
grandchild n.
female n.
milkweed n.
chemical n.
puzzling adj.
Words
Pre-reading
1.引起某人的注意
2.回到、返回
3.多达
4.下蛋
5.在大学里
6.小片的森林
7.动身去某地
draw one’s attention
Useful expressions:
return to…
as many as
lay eggs
at a university
small piece of forest
leave for
While-reading
1. In the United States and Mexico, farmers use chemicals that kill milkweed.
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 20 kilometers wide .
___________________________________________
Read the lesson and finish the exercise.
F
Yes, they do
He studies one kind of North American butterfly
230 million
在墨西哥，这种蝴蝶总是回到仅有20千米宽的同一小片森林。
T
√
1. 有关attention的短语
2. as…as 的用法
3. lie 与 lay的用法
fantastic
chemical
have been drawing
Language Points
attention
draw one’s attention to sth.
(使某人注意某事).
2. catch one’s attention
(引起某人注意)
3. pay attention to sth.
(注意、留心)
4. give one’s attention to sth.
(关心)
as…as…
1. He is ___________ his father.(像……一样高)
2. I do my homework ___________ my sister does.(像……一样认真)
3. They see ___________ one hundred students in front of the library. (像……一样多)
as tall as
as carefully as
as many as
lie 与 lay
The hens _____ (lay) eggs every day.
Have you ever ______ (lie) to your parents
lay
lied
lay (下蛋) --- laid --- laid --- laying
lie (说谎) --- lied --- lied --- lying
lie (平躺) --- lay --- lain --- lying
作形容词，意为“奇异的、极好的、了不起的”，在句中作定语或表语。如：
4. fantastic
I think this is a fantastic invention.
我想这是一个了不起的发明。
作可数名词，意为“化学物质、化学制品”，复数形式是chemicals。如：
There are no chemicals in this kind of food.
这种食品中没有化学物质。
5. chemical
作形容词，意为“化学的、化学作用的”，在句中作表语或定语。如：
We can find chemical additives in many foods.
我们在很多食品中发现了化学添加剂。
句中的have been drawing 是现在完成进行时，它由“助动词 have (has) + been + 现在分词”构成，当主语是第三人称单数时用助动词has，其他情况用助动词have。
6. Fantastic facts about the butterfly have been drawing Dr. Taylor’s attention.
它往往与表示一段时间的时间状语连用，如：all the time, this month, all day, these few days, for a year, since a week ago等。
She has been playing basketball after school this week. 这个星期她放学后一直打篮球。
Tony has been drawing in his bedroom all the afternoon. 托尼在卧室画了一下午。
What do you think is the most fascinating thing in nature
Post-reading
Discussion
Are you familiar with these sentences
They are from the books we have learned.
1. In Mexico, the butterflies always return to the same small piece of forest, which is only 20 kilometres wide.
2. The butterflies that return to the south are the great-great grandchildren of the butterflies that left for the north.
3. But in Mexico, people cut down the trees that the butterflies need to rest on because they want more land for farming.
4. In the United States and Canada, farmers use chemicals that kill milkweed.
Attributive Clause
定语从句
Grammar
定语从句是指在句中作定语的______。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，也叫作引导词，是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______或______，作_____时常可以省略。先行词为人时，引导词常用_____或_____；先行词为物时，引导词常用______或_______。
从句
主语
宾语
宾语
who
that
that
which
定语从句
Attributive Clauses
The boy who is wearing a black coat bought an iPod yesterday.
The experiments that we did yesterday were fantastic.
主语
定语从句
定语从句
主语
修饰the boy
修饰 experiments
关系词的用法 先行词 在从句中作主语 在从句中作宾语 在从句中作定语
指代人 who/that whom/ who /that whose
指代物 which/that which/ that whose/ of which
关系词
特殊情况下，由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。
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.
that
that/ which
that/ which
that/ who
that/ which
that/ who
7. I am sure she has something ________ you can
borrow.
8. I’ve read all the books ________ are not mine.
9. This is the first book__________ he has read.
10. This is the very book ______ belongs to him.
11. They talked for an hour of things and persons
_________they remembered in the school.
that
that
that
that
that
Finish the exercise on P73, 2
Practice
1. To grasp the contents
of this lesson.
2. Preview Lesson 29.
Homework
Thank You