英語復習教案：專題技能突破詞匯之派生

學必求其心得，業(yè)必貴于專精學必求其心得，業(yè)必貴于專精學必求其心得，業(yè)必貴于專精專題技能突破（38）詞匯之派生技能講解】有人說：“得單詞者得天下.”在英語學習中對于單詞的學習尤為重要.首先，掌握單詞的第一個層面是認識單詞的含義。構詞法的學習將幫助知道更多單詞的含義，有效的擴大詞匯量。英語的構詞法主要有：派生法、合成法和轉化法。派生法——詞根加前綴或后綴構成一個新詞的方法。典例剖析（1）形容詞＋ly變副詞eq\b\lc\\rc\}（\a\vs4\al\co1（careful→carefully，polite→politely))直接加lyeq\b\lc\\rc\}（\a\vs4\al\co1(angry→angrily，heavy→heavily））變y為i加lyeq\b\lc\\rc\｝(\a\vs4\al\co1(probable→probably，gentle→gently)）去e加y(2）動詞/名詞變形容詞eq\b\lc\\rc\}（\a\vs4\al\co1(accept→acceptable，fashion→fashionable,reason→reasonable，))＋ableeq\b\lc\\rc\}(\a\vs4\al\co1（nature→natural,culture→cultural))去e＋aleq\b\lc\\rc\}（\a\vs4\al\co1（forget→forgetful,hope→hopeful））＋fuleq\b\lc\\rc\｝(\a\vs4\al\co1（puzzle→puzzled,confuse→confused,underline→underlined）)＋deq\b\lc\\rc\}（\a\vs4\al\co1(convince→convincing,confuse→confusing，satisfy→satisfying)）eq\a\vs4\al\co1（去e加ing或，直接加ing)eq\b\lc\\rc\}（\a\vs4\al\co1(health→healthy，wealth→wealthy，worth→worthy)）＋y（3）動詞變名詞eq\b\lc\\rc\｝(\a\vs4\al\co1(approve→approval,arrive→arrival，survive→survival））ve→valeq\b\lc\\rc\｝（\a\vs4\al\co1(exist→existence,prefer→preference，refer→reference））＋enceeq\b\lc\\rc\｝(\a\vs4\al\co1（invite→invitation,expect→expectation))eq\a\vs4\al\co1（＋ation或去e＋ation）eq\b\lc\\rc\}(\a\vs4\al\co1（achieve→achievement,amuse→amusement,announce→announcement,entertain→entertainment）)＋menteq\b\lc\\rc\}(\a\vs4\al\co1(fail→failure,press→pressure））＋ure(4)形容詞變名詞eq\b\lc\\rc\｝(\a\vs4\al\co1（weak→weakness，careless→carelessness)）＋nesseq\b\lc\\rc\}(\a\vs4\al\co1(grow→growth,warm→warmth）)＋th(5）變動詞eq\b\lc\\rc\｝(\a\vs4\al\co1（able→enable，large→enlarge，broad→broaden,sharp→sharpen，wide→widen,less→lessen））adj。前＋en或后＋en（或n）(6)變否定eq\b\lc\\rc\}(\a\vs4\al\co1（polite→impolite，patient→impatient，formal→informal,convenient→inconvenient,regular→irregular,responsible→irresponsible,usual→unusual,willing→unwilling，necessary→unnecessary))eq\a\vs4\al(在adj。前加im，in,ir，或un變否定）技能演練用括號內(nèi)單詞的正確形式填空1．Theviruscanmovetoandaffecteverypartofthebodycausingdirectdamagetoorgansaswellasinternalbleedingandcausemulti。systemorgan________(fail)．答案：failure2．Iwas________（deep）touchedthatwordsIwrotetohelpmakesenseofmydarkdayscouldlightenthedarkdaysofsomeoneacrosstheworld。答案:deeply3．Donotcarrytoomuchmoneyor________(necessary)creditcards.答案：unnecessary4．IfwhatIwasabouttosaywaswrong,the________(possible)ofourteamwinningwouldbedestroyed________(complete）．答案：possibility；completely5．Iwassupposedtoarriveattheairportontime。________（fortunate）,Iwasheldupbytheheavytrafficjam.答案：Unfortunately6．Iwon’tdothepurchasebecausethepriceofthisdressis________（reason）．答案:unreasonable7．Whentheyfinallyarrived,MrBrownsaid________(angry)，“Ishouldbevery________（interest)tomeetthemanwhothrewthestoneyoumentionedint