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1、Unit 2 Saving the Earth Topic 1 Pollution has caused too many problems.Section ATeaching Aims1.重点短语及句型：重点短语及句型：see doing sth.What a mess!The flowers and grass have gone.What has happened here?What a shame!There are several chemical factories pouring waste water into the stream.2.语法：一般过去时和现在完成时的区别。语法
2、：一般过去时和现在完成时的区别。Have you ever had a picnic?Kangkang,Jane,Maria and Michael are planning a picnic for Sunday.They will go to the West Hill.What can you see there?We can see bees and butterflies dancing.beebutterfly Is the West Hill beautiful?a place withbeautiful flowersmany hillsgreen treesWhat a sh
3、ame/mess!The flowers and grass have gone!The flowers and grass have gone!Oh,my goodness.What a mess!Look!There are several chemical factories pouring waste water into the stream.=have disappeared.Is it beautiful now?What has happened there?P27 1a mp31b Listen to 1a and mark the words with P(Past)or
4、N(Now)._ beautiful _ butterflies _ dirty _ grass _ terrible _ factory _ bees _ fresh _ clean _waste waterPPNPNNPPPN1a Listen,look and say.1c Read 1a and complete the sentences in the table.Then retell 1a to your partner.Two years agoNow1.It was a _.2.There were _.3.The air was _ and you could see _.
5、1._ have gone.2.The water is _and smells _.3.There are several _ pouring _ into the stream.4._has changed.beautiful placelots of flowers and grassfresh and the water was cleanbees and butterflies dancingThe flowers and grassso dirtyterriblechemical factorieswaste waterEverythingThe flowers and grass
6、 have gone!Oh,my goodness.What a mess!Look!There are several chemical factories pouring waste water into the stream.=have disappeared.Is it beautiful now?What has happened there?P27 1a mp3waste waterwaste paperWaste water.浪费水。浪费水。Dont waste paper.不要浪费纸。不要浪费纸。wasteadj.v.There are several chemical fac
7、tories pouring waste water into the stream.有几家化工厂正在往小溪里排有几家化工厂正在往小溪里排放废水。放废水。There bedoing sth 有有在做某事在做某事e.g.There are some people waiting for the bus at the bus stop.倒出；倾泻倒出；倾泻pour into 把把倒入倒入e.g.Pour red wine into the glass.Language points:plan to do sth=make a plan to do sth 计划做某事1.several=a few+
8、复数名词2.waste adj.废弃的,无用的 waste water/paper v.浪费(反：save)Dont waste paper.n.浪费 Its a waste of time.3.pollute v.污染 Human polluted the sea.The stream is polluted by waste water from the factory.n.pollution 污染water/air/noise/soil pollution4.go vi.不复存在，不见了；变得；进展 eg.The pain has gone.(=has disappeared)The f
9、ish is going bad.鱼快变质了。Everything goes well.一切进展顺利。Learn by yourselves1.see bees and butterflies dancing(see sb/sth do/doing sth)2.What a mess!3.The flowers and grass have gone.4.What has happened here?5.What a shame!6.chemical factories 7.pouring into 8.waste water 9.There be sb./sth.doing sth.10.c
10、ut(+代词)down1.看见蜜蜂和蝴蝶看见蜜蜂和蝴蝶正在正在跳舞跳舞2.多脏乱啊！多脏乱啊！3.花草都消失了。花草都消失了。4.这里发生了什么这里发生了什么事情？事情？5.多么遗憾啊！多么遗憾啊！6.化工厂化工厂7.把把倒入倒入8.废水废水9.有某人有某人/某物正某物正在做某事。在做某事。10.砍倒砍倒Self-check1.看见蜜蜂和蝴蝶看见蜜蜂和蝴蝶正在跳舞正在跳舞2.多脏乱啊！多脏乱啊！3.花草都消失了。花草都消失了。4.这里发生了什么这里发生了什么事情？事情？5.多么遗憾啊！多么遗憾啊！6.化工厂化工厂7.把把倒入倒入8.废水废水9.有某人有某人/某物正某物正在做某事。在做某事。10
11、.砍倒砍倒1.see bees and butterflies dancing2.What a mess!3.The flowers and grass have gone.4.What has happened here?5.What a shame!6.chemical factories 7.pouring into 8.waste water 9.There be sb./sth.doing sth.10.cut(+代词)down(cut-cut-cut)smell-smelt-smelt 3 A.Listen to the sentences and number the pictu
12、res.5 53 32 21 14 46 61.People _ _ _ too many trees,so I dont have enough leaves to eat.2.I live in trees but now many trees _ _.3.I like leaves and grass,but now they _ _.4.I _ _ hungry for months because of less bamboo.5.Human polluted the sea,so I _ _ _.6.The water _ _ many years ago.But it _ _ _
13、 for me to live in now.B.Listen again and complete the sentences.have cut downhave gone have disappearedhave beendont live happilywas cleanis too dirty2 Work in pairs.Look at the pictures and make up conversations similar to the example with your partner.Example:A:There were lots of flowers and gras
14、s when I visited the village last year.B:But now the flowers and grass have gone.A:What has happened here?B:The villagers have destroyed them.lake/fishfactory/pollutehill/treesfarmers/cut downvillage/flowers and grassvillagers/destroy4 Work in groups and talk about pollution in a place you are famil
15、iar with.The following sentences may help you.ago,it was Now,have/has gone.What has happened?Everything has changed.Oh,my goodness!单项选择单项选择()1.Look!There are some boys _ on the playground.A.play football B.are playing football C.playing football D.plays football()2.Im sorry I cant go shopping with y
16、ou.I am ill._ A.What a mess!B.What a shame!C.What a pity!D.B and C()3.Dont _ water.We must save every drop of it.Sorry,I wont do it again.A.waste B.throw C.play D.leaveCDA用所给动词的适当形式填空。用所给动词的适当形式填空。1.When I entered the room,I saw Maria _(read)a Chinese book.2.What a shame!The flowers and trees in the
17、 park _ (go).3.Everything _(change)in the past few years.4.Pandas dont 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 beenhad1.Express exclamation:
18、What a mess!What a shame!Oh,my goodness!2.Know the differences between Simple Past and Present perfect.It was a beautiful place.Everything has changed.1.Some words:bee,butterfly,mess,shame,several,pour,waste,destroy,pollute,goodness2.Some phrases:see sb.doing sth.pourinto.3.Some sentences:There aredoing Homework1.Read 1a.2.Write a passage according to Part 4.3.Finish Section A in your workbook.4.Preview Section B.Thank you.