Unit5BirdwatchersVocabularymannersimpolitenecessaryregularirregulardishonestunnecessarycorrectn.礼貌,风度adj.无礼的,粗鲁的adj.必要的adj.规则的adj.不规则的adj.不诚实的adj.不必要的adj.正确的Newwordscommonimpossibleunfriendlyunwelcomeunableincorrectuncommonlitteradj.普通的,一般的adj.不可能的adj.不友好的adj.不受欢迎的adj.不能的adj.不正确的adj.不平常的n.垃圾Usingprefixestoformadjectiveswithoppositemeaning.单词中位于词根前面的部分就是前缀。前缀,可以改变单词的意思。前缀“dis-”,“im-”,“in-”,“ir-”,“un-”表示否定。Idon’tbelievewhathesays,becauseheisnothonest.Idon’tbelievewhathesays,becauseheisdishonest.dishonestdishonorable“dis-”Thisisnotahonorableaction.Thisisadishonorableaction.honesthonorableOppositesIfsomeoneshowsgoodmannerstoothers,heisapoliteperson.Ifsomeonedoesnotshowgoodmannerstoothers,heisimpolite(notpolite).politepossiblepatientimpoliteimpossibleimpatient“im-”Thatcoatisonly100yuan.It’snotexpensive.Thatisinexpensive.expensivecorrectinexpensiveincorrect“in-”Hispulseisnotregular.Hispulseisirregular.regularrelativeresponsibleirregularirrelativeirresponsible“ir-”friendlyhappycomfortablesafehealthyunfriendlyunhappyuncomfortableunsafeunhealthy“un-”necessarywelcomecommonableunnecessaryunwelcomeuncommonunableMatchtheadjectivesontheleftwiththeiroppositesontheright.necessaryimportantcomfortablehonestregularhappyuncomfortableirregulardishonestunhappyunnecessaryunimportantLearningaboutbirdwatchingwelcomecorrectcommonfriendlypossibleableimpossibleunfriendlyunwelcomeunableincorrectuncommonCompletethesentencesbelow.1.Zhalongisanaturereserve.Itis_________tohuntorfishthere.2.Whenyougobirdwatching,yousometimeshavetowalkalongway.Ifyouwearnewleathershoes,theycanbe_________________.incorrectuncomfortable3.IfyouareinterestedinbirdsyoucangotoZhalong.Butifyouleavelitterthere,youwillbe___________.4.Therearenotmanyred-crownedcranesintheworld.Theyare_____________.5.Ifwedonotprotectthewetlands,itwillbe___________toseethesebirdsinthefuture.unwelcomeuncommonimpossibleSomepeopleare__________(friendly,unfriendly)tobirds.Theythrowstonesatthem.Somepeoplefeel________(happy,unhappy)becausethegovernmentgivepoorpeoplesuchsmalland________________(comfortable,uncomfortable)flats.unfriendlyunhappyuncomfortableFillintheblanks•Itis_______(safe,unsafe)towalkonthestreetatnight.•Weshouldkeepstudentsstayingawayfromthe___________(healthy,unhealthy)books.unsafeunhealthy•Youwillbe_______topasstheexamifyoudon’tstudyhard.•Therearelotsof__________kindsofbirdsinZhalong.•Itis_________foryoutowalkthelittledogonceaweektothepark.unableuncommonnecessaryimportant,happy,able,necessary,regular,possible,commonFillintheblankswiththewordsbelow.•Itis___________tokeepquietwhenyouwatchbirdsandinsects.•Hefelt_________becausehelosthiswallet.•Thereisa________rainintheSaharadeserteveryyear.•Isit__________togettothecitybytrain?importantunhappyregularpossible