《外研版九年级上册英语Module12-Unit3ppt课件.ppt》由会员分享，可在线阅读，更多相关《外研版九年级上册英语Module12-Unit3ppt课件.ppt（52页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、2023/1/1912023/1/1922023/1/193Reuse means“use again”.Though pollution is heavy now,I dont think its hopeless.2023/1/194Make a new words.Join the parts of words in Box A with the words in Box B.You need to use some of the parts more than once.A able -ful im-less re-un-B care collect hope possible use
2、 usual wanted wastecollectable,usable,careful,hopeful,useful,wasteful,impossible,careless,hopeless,useless,reuse,unusual,unwanted2023/1/195 Now work in groups.Play the guessing game English for Fun.1.full of care _2.can be collected _3.full of hope _4.without any hope _5.not possible _carefulcollect
3、ablehopefulhopelessimpossible2023/1/1966.not usual _7.without any use _8.use again _9.not wanted _10.making a lot of waste _ unusual uselessreuseunwantedwasteful2023/1/197Sometimes if you know the meaning of the parts of a word,you can work out the meaning of the whole word.re+new+able;re=again,able
4、=can be renewable=can be new again2023/1/1981.合成法合成法 将两个或两个以上独立且语义不同的将两个或两个以上独立且语义不同的单词合在一起构成新词的方法叫做合成单词合在一起构成新词的方法叫做合成法。合成法是一种比较灵活的构词方法，法。合成法是一种比较灵活的构词方法，可以合成名词、形容词、副词、代词、可以合成名词、形容词、副词、代词、动词等。例如：动词等。例如：afternoon,sportsman,blackboard,sportsperson,newspaper,2023/1/199 airplane,classmate,grandfather 等
5、等就是通过合成构词法构成的名词；就是通过合成构词法构成的名词；kind-hearted,middle-aged,hard-working 等为合成形容词；等为合成形容词；however,maybe,himself,everyone,nothing,overlook 等也都是通过合等也都是通过合成法构成的单词。成法构成的单词。2023/1/19102.派生法派生法 通过在词根前面加前缀或在词根通过在词根前面加前缀或在词根后面加后缀构成一个新词的方法叫后面加后缀构成一个新词的方法叫作派生法。要通过派生法理解和记作派生法。要通过派生法理解和记忆单词忆单词,我们需要掌握常见的前缀和我们需要掌握常见的前
6、缀和后缀及派生规律。后缀及派生规律。2023/1/1911(1)常见前缀常见前缀前缀前缀含义含义例词例词dis-不不disagree,dislikeen-使使处于某种处于某种状态状态enable,enrichim-,in-不不impossible,impatient,inexpensiveinter-在在之间之间,相相互互international,interconnect2023/1/1912前缀前缀含义含义例词例词mis-错误地错误地mislead,misunderstandnon-不不,非非non-smoker,non-nativere-再再,重复重复rewrite,retellun-不
7、不unable,unhappy,unpopular2023/1/1913(2)常见后缀常见后缀后缀后缀功能功能例词例词-er,-or构成名词构成名词teacher,worker,visitor-ianmusician-ingbuilding,painting,shopping,meaning-istartist,scientist2023/1/1914后缀后缀功能功能例词例词-ment构成名词构成名词agreement,government-nesscoldness,happiness,illness-thtruth,warmth-tioncompetition,education,infor
8、mation,invitation-tyactivity,safety2023/1/1915后缀后缀功能功能例词例词-able,-ible构成构成 形容词形容词comfortable,eatable,enjoyable,possible,-alenvironmental,international,national,traditional-fulcareful,helpful,useful-iveactive,expensive-lesscareless,helpless,homeless,useless2023/1/1916后缀后缀功能功能例词例词-ly构成构成 形容词形容词friendly
9、,lovely,monthly,weekly-ousdangerous,famous-teen构成数词构成数词eighteen,fifteen,seventeen-thfifteenth,fifth,fortieth,seventh-tyforty,sixty,twenty-ly构成副词构成副词badly,carefully,carelessly,happily,quickly2023/1/1917(3)派生规律派生规律由一个词根加上相应的词缀可以派生由一个词根加上相应的词缀可以派生出名词、形容词、副词等，掌握派生出名词、形容词、副词等，掌握派生规律对扩充词汇有很大帮助。例如：规律对扩充词汇有
10、很大帮助。例如：由由 interest 可以派生出：可以派生出：uninterestinginterest interesting interestingly interested uninterested2023/1/1918由由 help 可以派生出：可以派生出：helpless helplesslyhelp helpful helpfully由由 able 可以派生出：可以派生出：enableable unable ability disable2023/1/19193.转化法转化法 英语构词法中把一种词性转化为另一英语构词法中把一种词性转化为另一种词性而词形不变的方法称作转化法。种词性
11、而词形不变的方法称作转化法。常见的转化有：常见的转化有：(1)动词转化为名词动词转化为名词 Lets talk about it more.咱们再谈谈这件事吧。咱们再谈谈这件事吧。I think wed better finish the talk now.我想我们最好现在结束谈话。我想我们最好现在结束谈话。2023/1/1920(2)名词转化为动词名词转化为动词 She gave me a cup of water.她给了我一杯水。她给了我一杯水。You should water the flowers twice a day.你应该每天给这些花浇两次水。你应该每天给这些花浇两次水。2023
12、/1/1921(3)形容词转化为名词形容词转化为名词 She was wearing a black dress.她穿着一条黑色的裙子。她穿着一条黑色的裙子。The girl in black looks very beautiful.那个穿黑衣服的女孩看上去很漂亮。那个穿黑衣服的女孩看上去很漂亮。2023/1/1922Complete the sentences with the words in the box.hopeful impossible reuse unhealthy wasteful 1.Polluted water is _.2.It is _ to throw so mu
13、ch food away.unhealthywasteful2023/1/19233.If you look after things well,you may _ some of them later.4.It is _ to clean up the whole river in such a short time.5.If we pay attention to pollution now,the future will be _.reuseimpossiblehopeful2023/1/1924Complete the table.NounVerbAdjectiveAdverb use
14、ful/uselesshopehopefully/hopelesslypollutionwaterwasteusually/unusuallyuseuseusefully/uselesslyhopehopeful/hopelesspollutepolluted/unpollutedwaterwastewasteful/wastedwastefullyusual/unusual2023/1/1925Complete the sentences with the correct form of the words in Activity 3.She was hopeful that her new
15、 job would make her more successful.1.The factory _ the river,and the fish died.2.We often walk in the countryside.It is a(n)_ activity for us.pollutedusual2023/1/19263.Do not use so much water.It is very _.4.To keep the flowers growing,you need to _ them once a day.wastefulwater2023/1/1927Complete
16、the sentences.A lunchbox is a box that you keep your lunch in.1.A _ is a card that you write on one side of and send to someone by post.2.A _ is a room where you have classes at school.postcardclassroom2023/1/19283.A _ is a book that has one or more stories for children.4.A _ is a black board that i
17、s used at school for writing on with chalk.storybookblackboard2023/1/1929Look at the pictures and answer the questions.2023/1/19301.What kinds of things can be recycled?2.How can these things be reused?3.How does this help the environment?4.Have you ever recycled or used things that can be recycled?
18、How?2023/1/1931Complete the conversation with the correct form of the expressions in the box.be good for throw away turn off worry about2023/1/1932Mike:I hear you are off to the Caribbean for a holiday!Lucky you!But arent you _ the pollution that such long plane journey may cause for the environment
19、?Ken:I know,but what can I do about it?Ive already tried my best to protect the environment.worried about2023/1/1933I recycle.I dont _ things if I dont want them any more.I _ the lights when I leave a room.Dont tell me I shouldnt travel by plane any more!throw awayturn off2023/1/1934Mike:No,of cours
20、e not.But we can do more to protect the environment.For example,we can help keep the air clean by planting trees.Trees _ the environment.In this way,we can reduce the harm of pollution.are good for2023/1/1935Ken:Good!So I can enjoy my holiday,and when I come back,Ill plant some trees!Mike:Thats the
21、idea!Maybe we can all join in and start a small forest!2023/1/1936Listen and check()the true sentences.1.It is OK to throw used things away.Looking after them takes a lot of time.2.Do not throw away things made of glass,plastic and paper,but recycle them when possible.3.Take a bag when you go shoppi
22、ng.2023/1/19374.Producing electricity and using oil will not cause pollution.5.Turn off lights when you do not need them.6.Ride a bike or walk,and do not often drive your car.2023/1/1938Listen again and complete the table.Advice Reasons 1.Dont throw away things made of _,but _ them.Throwing things a
23、way is wasteful.2._ your plastic bags when you can and _ with you when you go shopping.Plastic bags _ recycle.glass,plastic and paperrecycleReusetake a bagare hard to 2023/1/1939Advice Reasons 3.Use less electricity and oil to _.4.Dont leave lights on and _.5._ and do not often drive your car.Produc
24、ing electricity and using oil may cause _.reduce pollutionwaste electricityWalk or cyclepollution2023/1/1940Earth Hour2023/1/1941Read the passage and answer the questions.When is Earth Hour held each year?Earth Hour is held toward the end of March each year.Why do people switch off the lights during
25、 Earth Hour?They do this to show their awareness of climate change.2023/1/1942When and where was the first Earth Hour held?The first Earth Hour was held in 2007 in Sydney.2023/1/1943Which city take part in the event today?More and more cities are taking part in the event,such as Beijing,London,Rome
26、and New York.2023/1/1944Work in groups.Decide what kind of pollution you want to talk about.2023/1/1945Choose a subject that you care about the most.It could be water pollution,air pollution,etc.Find out more information about your subject.Look it up on a website or in a book.2023/1/1946If you choos
27、e air pollution,lets watch a video about air pollution from a factory.2023/1/1947Do you know PM 2.5?Lets know more about PM 2.5 and protect the environment from now.2023/1/1948Discuss your subject.Take turns to say what you think about the problem and what can be done.2023/1/1949Listen to what others say.If you agree with what they have said,say“I agree”.“Thats true”or“Thats a good point”;if you do not agree with what someone says,say“Im sorry,but I dont agree.I think that”2023/1/1950Present your group ideas to the whole class.2023/1/1951