Unit 5 Lesson 27 Planet Danny课件 冀教版英语九年级全册（21张PPT）

(共21张PPT)
Unit 5 Lesson 27
We will learn
The new words:
telescope, solar, unless, double, mystery
Important and difficult points:
①Try looking through the other end.
②Maybe Brian and I can join you after supper.
③Scientists use huge telescopes when they look for planets.
④Well, it’s worth a try, even if I don’t find a planet.
Do you know any of the planets in the solar system
Lead in
Ask and answer
What would you like to look at with a telescope
Do the earth, the sun and the moon belong to the solar system
It’s solar system.
/ s l /
adj. 太阳的，
关于太阳的
Our solar system is in the Milky Way.
It’s called the Milky Way.
The Milky Way has more than five hundred billion stars.
New Words
telescope
/ tel sk p/
mystery
/ m stri/
n.奥秘
double
/ d bl/
n.& adj.&adv.
两倍（的），双倍（的）
certainly = sure
adv.当然，确定
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
Language points
I don’t think you can find one unless you have a bigger telescope.
我认为你不会找到的，除非你有一架更大的望远镜。
unless为连词,意为“除非,如果不”，相当于if…not… ，引导条件状语从句。
当主句是一般将来时态、祈使句或谓语中含有情态动词或主句是一般现在时,
从句中要用一般现在时代替一般将来时。
I will be very angry unless you go with me.
=I will be very angry if you don’t go with me.如果你不和我去, 我会很生气。
You will miss the bus unless you hurry up。
除非你快一点，否则你会误车。
Don’t ask me to explain unless you really don’t understand.
不要叫我解释, 除非你真的不懂。
作动词，意为“使加倍，翻倍”
2.Actually, double the size of your house.
确切地说，有你房子的两倍大！
double
The number of the houses here may double in 5 years.
五年内这里的房屋数量可能会翻倍。
We’d like a double room. 我们想要一个双人间。
作形容词， 意为“双倍的，两倍的，两用的”，在句中作定语或表语。
3. Well, it’s worth a try, even if I don’t find a planet.
嗯，那仍值得一试，即使我没有发现一颗行星。
The clock is worth ten dollars.这个钟表价值10美元。
Is it worth running such a risk 这样冒险值得吗？
He will come on time even if it rains.
即使下雨他也会按时来。
worth 形容词，意为“值得”。
be worth doing sth. 值得做某事
even if 意为“即使；纵然” （= even though），引导让步状语从句。
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：
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。
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。
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。
Homework
1.Finish off the exercises in the activity book.
2.Preview Lesson 28.
Thank you!