文档介绍：Topic 3
What kinds of things
can we do to protect the
environment?
Unit 2 Saving the Earth
Section B
A : I like English and I’m good at it.
B: I am good at English while my sister is good at history.
C: My uncle is poor but he is happy.
D. Study hard, or you will fail the exam.
Say a sentence with
and, or, but & while like this.
A Game：
Imagine you are spreading the message about protecting the environment. What advice can
you give us?
You should …
You ought to …
Plant more trees.
Lead in
Let's turn green!
Imagine you are spreading the message about protecting the environment. What advice can
you give us?
You should …
You ought to …
Turn off the lights
and turn off the tap.
Imagine you are spreading the message about protecting the environment. What advice can
you give us?
You should …
You ought to …
Walk or ride a bike instead of taking
a bus or a taxi
Imagine you are spreading the message about protecting the environment. What advice can
you give us?
You should …
sort the garbage
You ought to …
Throw rubbish
in the dustbin.
Imagine you are spreading the message about protecting the environment. What advice can
you give us?
a cloth bag
You should …
You ought to …
Take a cloth bag when you go shopping.
Don’t use plastic bags.
ought to+ 动词原形
应该做, 应当做
ought to情态动词, “应该，应当”,无人称和时态变化
Ought you to cheat in the exam?
Yes, we ought to./ No, we oughtn’t to.
We ought to turn off the lights when we leave a room.
ought not to
+ 动词原形
不应该做，不应当做
We ought not to get up so late in the morning.
Would Michael like to be a greener person?
(2) When you go shopping, do you take a cloth bag or a plastic bag?
Yes, he’d love to.
Take a cloth bag.
Listen to 1a, then answer the following questions.
1a
Look, listen and say
What will a greener person do when he leaves a room?
What will you do if you travel a short distance?
He will turn off the lights.
I will w