Unit4DoItYourselfWatchavideo•It`suncommonandunusual.Thebabyisnothappy,heisunhappy.Theboyisnothealthy,heisunhealthy.Theroomisnottidy,it`suntidy.Practise•选词填空:•1.Somepeopleare___________(friendly,unfriendly)tobirds.Theythrowstonestothem.•2.Somepeoplefeel_________(happy,unhappy)thatgovernmentgivepoorpeoplesuchsmalland_____________(comfortable,uncomfortable)flats.•3.Itis_______(safe,unsafe)towalkaloneonthestreetatnight.•4.Weshouldkeepstudentsstayingawayfromthe________(healthy,unhealthy)books.unfriendlyunhappyuncomfortableunsafeunhealthyOpposites(反义词)friendlyhappycomfortablesafehealthyunhealthy“un-”certaincommonimportantinterestinguninterestingunfriendlyunhappyuncomfortableunsafeuncertainuncommonunimportantopposites(反义词)Ifsomeoneshowsgoodmannerstoothers,heisapoliteperson.Ifsomeonedoesnotshowgoodmannerstoothers,heisnotpolite.Ifsomeonedoesnotshowgoodmannerstoothers,heis_________.politepossiblepatientimpatient“im-”impoliteimpoliteimpossible1.Thiscoatisveryexpensive.Itcosts1000yuan.Butthatcoatisnotexpensive.Thatis___________expensivecorrectactiveinexpensive“in-”inexpensive.incorrectinactiveOpposites(反义词)•Youwillbe_____topasstheexamifyoudon’tstudyhard.•Therearelotsof_________kindsofbirdsinZhalong.•Itis___________togiveourstudentsanexamonceaweek.•ItiswrongformanyyounypeopletothinklearingChineseis___________•Hefeels_________becausehelosthiswallet.•Therearesomemistakesinhishomework,it`s___________.•Itis__________tofinishsomuchworkinsuchshorttime.unableuncommonunnecessaryunimportantunhappyincorrectimpossible用所给词的适当形式填空:important,happy,able,necessary,correct,possible,common1.un----2.im----3.in-----最常用的前缀常用在以‘m/p’开头的词前常用在以‘c’开头的词前Doyouknowthenegativeprefixes?certainimportantcomfortableinterestingwelcomecommonfriendlyablenecessaryactivecorrectpossiblepolitepatientuncertainunimportantuncomfortableuninterestingunwelcomeuncommonunfriendlyunableunnecessaryinactiveincorrectimpos...