Unit 2 Saving the earth. Topic 1 Pollution has causes too many problems.SectionA课件19张

课件19张PPT。Unit 2 Saving the Earth
Topic 1 Pollution has caused too many problems.
Section AReviewBee :n蜜蜂 butterfly: n 蝴蝶
chemical：adj 化学的
Mess：n混乱 factory：n 工厂
Shame：n羞愧
Several：adj几个 若干（few)
Pollute :v 污染 –pollution
Waste：v 浪费 adj 浪费的
Villager：n 村民
Pour…into：v 倒入…..Welcome toThe West HillTwo years agoTwo years agoThere were lots of flowers and grass. We could see bees and butterflies dancing.beebutterfly The West Hill was beautifulThe air was fresh and the water was clean.Have you ever had a picnic?Kangkang, Jane, Maria and Michael are planning a picnic for Sunday.
They will go to the West Hill.The flowers and grass have gone! Oh,What a mess!Look! There are several chemical factories pouring waste water into the stream.= have disappeared.Now1c Complete the sentences in the table.beautiful placelots of flowers and grassfresh and the water was cleanbees and butterflies
dancingThe flowers and grassso dirtyterriblechemical factorieswaste waterEverythingLet’s talk!Look at the pictures. Try to describe them. Two years , it place. There .
The air and the water ,
and you
But now everything . The flowers and grass .The water
and smells . What here?
Look, there are several chemical factories
the stream. Oh,
!agowas a beautiful were lots of flowers and grasswas fresh was cleancould see bees and butterflies dancinghas changedhave goneis so dirtypouring waste water intoWhat a shameterriblehas happenedWhat a shameLanguage pointsWhat a shame!/what a mess!
You can see bees and butterflies dancing.
There are several factories pouring waste water into the stream.
感叹句see sb doing 看见某人正在做…Pour ….into把…倒入多可惜啊！一团糟！see sb do 看见某人做了…There be…doing sth… ……有……在做某事e.g. _____ ____ some people _____ (wait) for the bus at the bus stop.TherearewaitingThere are some chemical factories pouring waste water into the streamThere be…doing sth… ……有……在做某事There is a boy swimming in the oceanThere are some butterflies
and bees dancing Present perfect（现在完成时） 花和草都消失了！
这儿发生了什么?
一切都变了。结构：Have/has +done（动词过去分词）常常与always，
yet, already, never, ever, just, before 搭配E.g. I have found my pen already.
I haven’t found my pen yet.
I have been to the Great Wall .
He has done his homework.
Has he done his homework?
.The flowers and grass have gone !What has happened here?Everything has changed.Exercises单项选择
( ) 1. Look! There are some boys___ on the playground.
A. play football B. are playing football
C. playing football D. plays football
( ) 2. — I’m sorry I can’t go shopping with you. I am ill.
— ________
A. What a mess! B. What a shame!
C. What a pity! D. B and C
( ) 3. — Don’t ___ water. We must save every drop of it.
— Sorry, I won’t do it again.
A. waste B. throw
C. play D. leave
CDAExercises用所给动词的适当形式填空。
When I entered the room, I saw Maria ______ (read)
a Chinese book.
2. What a shame! The flowers and trees in the park _________ (go).
3. Everything ________ (change) in the past few years.
4. Pandas don’t have enough bamboos ______ (eat) now
because of the pollution.
5. — Where have they been?
— They ______ (be) to the Great Wall. They _______
(have) a good time there the day before yesterday.readinghave gonehas changedto eathave beenhadsummaryWe learn:1. Express exclamation:
What a mess! What a shame!
2. Know the differences between Simple Past
and Present perfect.
It was a beautiful place.
Everything has changed.We can:1. Some words:
bee, butterfly, mess, shame, several, pour, waste,
destroy, pollute, goodness
2. Some phrases:
see sb. doing sth. pour…into..
3. Some sentences:
There are…doing… What have we done ?No Clean water to drink Dirty airGreen house effect Melting融化 iceHomeless animalsSave the earth , our only homeThank you