WordpowerUnit4Hands-onfun

Oneofthemostcommonprefixesforadjectivesisun-.Itmeans“not”.Weaddittosomeadjectivestogivethemtheoppositemeaning.Wecanalsousesomeotherprefixes,suchasin-andim-,toformnewadjectiveswiththeoppositemeaning.luckyunluckycorrectincorrectpossibleimpossibleusualunusualcompleteincompletepoliteimpolite

AAddthecorrectprefixestothewordsbelowsothattheyhavetheoppositemeanings.Youmayuseadictionarytohelpyou.1interesting _____________ 2sure _____________3able _____________ 4friendly _____________5active _____________ 6patient _____________7expensive _____________ 8perfect _____________uninterestingunsureunableunfriendlyinactiveimpatientinexpensiveimperfect

BReadtheconversationsbelow.Fillintheblankswithwordsinthebox,addingthecorrectprefixestothem.correcttidyusualpossiblepatient1Simon:DoyouspendmuchtimedoingDIY,Nora?Nora:Yes,Ido!It’s________tofindmewithoutaDIYjobtodo.Whataboutyou?Simon:I’mnotafanofDIYbecauseI’mtoo___________.Nora:Ohyes,it’s_________tofinishaDIYjobifyouarenotpatient.~~~~~~~~~~~~~~spendtime(in)doing花费时间做……unusualimpatientimpossible

2Mum:Suzy,yourroomisreally________——thingsarealloverthefloor.Suzy:Sorry,Mum.I‘lltidyupsoon.Itseemssomeoftheanswersinmyhomeworkare_________.I‘mlookingformytextbookstocheck.untidycorrecttidyusualpossiblepatientincorrect

CWriteaboutyourandyourfriends’DIYjobs,usingtheprefixesun-,in-andim-.略

1否定前缀un-un-加在形容词前，让词义变成“不……的”。happy→unhappy（不开心的）；fair→unfair（不公平的）；usual→unusual（不寻常的）。探究构词法否定前缀un-,in-和im-

2否定前缀in-in-加在形容词前，也表示“不……的”。correct→incorrect（不正确的）；complete→incomplete（不完整的）；visible→invisible（看不见的）。

3否定前缀im-im-常用于以“b”“m”或“p”开头的单词前。patient→impatient（不耐烦的）；polite→impolite（不礼貌的）；possible→impossible（不可能的