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1、Section A,All these problems are very serious.,Unit2 Topic2,学习目标：1、熟记新单词，学会运用新短语；2、学习不定代词和不定副词。情感目标：了解沙尘暴的形成及其危害，认识树木的重要性，提高环保意识。,Review:Read the new words and review the pollution around us.,water pollution,noise pollution,air pollution,soil pollution,light pollution,litterwhite pollution,forest,Le
2、ad in,What happened to the forest?,People have cut down too many trees.The forest has gone.,Whats worse,the forest has changed into desert.,n.沙漠 v.舍弃、遗弃,The wind is blowing strongly with lots of sand,we call it sandstorm.,n.沙,n.沙尘暴,Wash the earth away,many trees,change into desert,forest gone,sandst
3、orms come into being,cut down trees,(4),(1),(5),(3),(6),(2),思考：How does the sandstorm come into being?,形成、产生,Self study：（小组讨论，完成自主学习）,1、Enjoy the flash35-1a.swf and choose the best answer.2、Change the word into correct forms.3、Read the dialog,underline the phrases and translate them.,1、The boy and g
4、irls are talking about _,B,2、【词形变换】变为名词：pollute _ 变反义词：outside _ 变同义词：prevent _；though _；rubbish _,pollution,inside,stop,although,litter,展示：Show me your answers.,3、短语翻译,1.刚才_2.不能看见任何东西 _3.砍伐太多的树木_4.结果 _ 5.大量富饶的土地_6.变成_7.阻止大风刮走泥土_8.阻止流水冲走泥土_9.对有害_10.人类 _,just now,cant see anything,cut down too many t
5、rees,be harmful to,stop the wind from blowing the earth away,change into,as a result,just now,stop the water from washing the earth away,human being,Trees can stop the wind from blowing the earth away.Trees can also stop the water from washing the earth away.,Read 1a and complete trees functions,B、A
6、 lot of water can be saved by forests,A、Trees can stop the wind from blowing the earth away.,C、Trees can also stop the water from washing the earth away.,Groupwork：（小组讨论，分析以下句子，并总结短语的用法）,展示学生成果：（叫同学讲解并用投影仪展示讨论结果）,2、As a result,a lot of rich land has changed into desert.结果，许多肥沃的土地已经变成了沙漠。点拨：a)change
7、into（把变成）=turn into 把.(转)变成.e.g：Please change English into Chinese.请把英语变成汉语。练习：我们可以把冰变成水。We can _ ice _ water.,1、What bad weather!点拨：What引导的感叹句-a.What+形容词+不可数名词/可数名词复数！（不可数名词如:news;advice;weather;water）b.What+a/an+形容词+可数名词单数！练习：1）多么繁忙的一天呀！_ 2)多么清澈的水呀！_,重点讲评,What a busy day!,What clean water!,change,
8、water,3、Trees can stop the wind from blowing the earth away.树可以防止大风刮走泥土。Trees can also stop the water from washing the earth away.也可防止流水冲走泥土点拨：stop sb./sth.(from)doing sth.=prevent sb./sth.(from)doing sth.-阻止做某事 链接：同义词组 keep sb./sth.from doing sth.-阻止做某事（from不能省略）练习：大雨使我们无法外出。The heavy rain us going
9、 out.=_=_,stops,The heavy rain prevents us form going out.,The heavy rain keeps us form going out,form,4、Cutting down trees is harmful to human beings,animals and plants.译：_思考：cutting down trees是_短语在句子中作_语，谓语用_数。练习：阅读是我的爱好。my hobby.,5、不定代词和不定副词(一)不定代词：指人：someone/somebody anyone/anybody no one/nobody
10、 everyone/everybody指/：something anything nothing everything（二）不定副词：somewhere anywhere nowhere ever,动词,单,主,Reading,is,砍伐树木对人类、动物和植物有害。,()1.We should humans destroying the environment.A.keep.by B.stop.to C.prevent.by D.stop.from()2.I have to wait for the traffic lights to green.Then I can go on walkin
11、g.A.change B.changed C.change to D.changing into()3.The heavy rain us from finishing the work.A.protected.B.prevented C.moved D.made()4.The driver was badly hurt _ of the traffic accident.A.at a result B.in the result C.with the result D.as a result()5.always helps others _ she is very busy.A.butB.and C.althoughD.because()6.We must plant more trees after we _ every year.A.cut off themB.cut them off C.cut down them D.cut them down,自我检测,Answers:1、C 2、D 3、D 4、D 5、B 6、D 7、C 8、D,Thank you,Homework:1、English workbook:Section A 2、总结不定代词和不定副词的用法。,
