1、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 pollutionWaste：v 浪费 adj 浪费的Villager：n 村民Pourinto：v 倒入.Welcome toThe West HillTwo years agoThere were lots of flowe
2、rs 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
3、 mess!Look!There are several chemical factories pouring waste water into the stream.=have disappeared.1b Listen to 1a and mark the words with P(Past)or N(Now)._ beautiful _ butterflies _ dirty _ grass _ terrible _ factory _ bees _ fresh _ clean _waste waterPPNPNNPPPN1c Complete the sentences in the
4、table.beautiful placelots of flowers and grassfresh and the water was cleanbees and butterflies dancingThe flowers and grassso dirtyterriblechemical factorieswaste waterEverythingLets talk!Look at the pictures.Try to describe them.Two years,it place.There.The air and the water,and youBut now everyth
5、ing.The flowers and grass.The waterand smells .What here?Look,there are several chemical factories the stream.Oh,!agowas a beautifulwere lots of flowers and grasswas freshwas cleancould see bees and butterflies dancinghas changedhave goneis so dirtypouring waste water intoWhat a shameterriblehas hap
6、penedWhat 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 bedoing sth 有在做某事e.g._ _ some people _(wait)for the bus at the bus stop
7、.TherearewaitingThere are some chemical factories pouring waste water into the streamThere bedoing 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
8、 搭配E.g.I have found my pen already.I havent 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.单项选择()1.Look!There are some boys_ on the playground.A.play football B.are playin
9、g football C.playing football D.plays football()2.Im sorry I cant go shopping with you.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。1.When I entered the room,I saw M
10、aria _(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 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 yesterda
11、y.readinghave gonehas changedto eathave beenhad1.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.1.Some words:bee,butterfly,mess,shame,several,pour,waste,destroy,pollute,goodness2.Some phrases:see sb.doing sth.pourinto.3.Some sentences:There aredoingWhat have we done?No Clean water to drinkDirty airGreen house effectMelting融化 iceHomeless animalsSave the earth,our only homeThank you
