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1、Unit 5 BirdwatchersVocabularymannersimpolitenecessaryregularirregulardishonestunnecessarycorrectn.禮貌，風(fēng)度禮貌，風(fēng)度adj.無禮的，粗魯?shù)臒o禮的，粗魯?shù)?adj.必要的必要的adj.規(guī)則的規(guī)則的adj.不規(guī)則的不規(guī)則的adj.不誠(chéng)實(shí)的不誠(chéng)實(shí)的adj.不必要的不必要的adj.正確的正確的 New words commonimpossibleunfriendlyunwelcomeunableincorrectuncommonlitteradj.普通的，一般的普通的，一般的adj.不可能的不可能的ad

2、j.不友好的不友好的adj.不受歡迎的不受歡迎的adj.不能的不能的adj.不正確的不正確的adj.不平常的不平常的n.垃圾垃圾Using prefixes to form adjectives with opposite meaning.單詞中位于詞根前面的部分就是前綴。前綴，可以改變單詞中位于詞根前面的部分就是前綴。前綴，可以改變單詞的意思。單詞的意思。前綴前綴“dis-”,“im-”,“in-”,“ir-”,“un-”表示否定。表示否定。I dont believe what he says,because he is not honest.I dont believe what he

3、says,because he is dishonest.dishonestdishonorable“dis-”This is not a honorable action.This is a dishonorable action.honest honorable Opposites If someone shows good manners to others,he is a polite person.If someone does not show good manners to others,he is impolite(not polite).polite possible pat

4、ient impoliteimpossibleimpatient“im-”That coat is only 100 yuan.Its not expensive.That is inexpensive.expensive correct inexpensiveincorrect“in-”His pulse is not regular.His pulse is irregular.regular relative responsible irregularirrelativeirresponsible“ir-”friendly happy comfortable safe healthy u

5、nfriendlyunhappyuncomfortableunsafeunhealthy“un-”necessary welcome common able unnecessaryunwelcomeuncommonunableMatch the adjectives on the left with their opposites on the right.necessaryimportantcomfortablehonestregular happyuncomfortableirregulardishonestunhappyunnecessaryunimportantLearning abo

6、ut birdwatchingwelcomecorrectcommonfriendlypossibleableimpossible unfriendlyunwelcomeunableincorrectuncommonComplete the sentences below.1.Zhalong is a nature reserve.It is _ to hunt or fish there.2.When you go birdwatching,you sometimes have to walk a long way.If you wear new leather shoes,they can

7、 be _.incorrectuncomfortable3.If you are interested in birds you can go to Zhalong.But if you leave litter there,you will be _.4.There are not many red-crowned cranes in the world.They are _.5.If we do not protect the wetlands,it will be _ to see these birds in the future.unwelcomeuncommonimpossible

8、Some people are _(friendly,unfriendly)to birds.They throw stones at them.Some people feel _(happy,unhappy)because the government give poor people such small and _(comfortable,uncomfortable)flats.unfriendlyunhappyuncomfortable Fill in the blanks It is _(safe,unsafe)to walk on the street at night.We s

9、hould keep students staying away from the _(healthy,unhealthy)books.unsafeunhealthy You will be_ to pass the exam if you dont study hard.There are lots of _ kinds of birds in Zhalong.It is _ for you to walk the little dog once a week to the park.unableuncommonnecessaryimportant,happy,able,necessary,regular,possible,commonFill in the blanks with the words below.It is _ to keep quiet when you watch birds and insects.He felt _ because he lost his wallet.There is a _ rain in the Sahara desert every year.Is it _ to get to the city by train?importantunhappyregularpossible