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Unit4Iusedtobeafraidofthedark.SectionA课文重难点精讲精选1.—Mario,youusedtobeshort,didn’tyou?马里奥，你以前个子矮，对吗？—Yes,Idid.是的。【解析1】：1.usev.使用→usefuladj.有用的useup用完Eg：StudyingEnglishis__________(use).2.usesthtodosth用某物做某事Eg：WeuseInternet__________(find)information.3.usedtodosth过去常常做某事，表示过去做过的事现在已经不做，只用于过去时态。◆变成否定句或疑问句时要借助助动词didn’t/did【拓展】：1.肯定形式：主+usedto+do…Eg:Iusedtogetupatsix.2.否定形式：主+usedn’t/didn’tuse+todo…Eg:Heusedn’ttostudyhard.=Hedidn’tusetostudyhard.3.疑问形式:①Used+主语+todosth…?答语：Yes,主语+usedto./No,主语+usedn’tto②Did+主语+use+todo….?答语：Yes，主语+did./No,主语+didn’tUsedhetogotoschoolonfoot?=Didheusetogotoschoolonfoot?4.反意疑问句：①肯定句+didn’t/usedn’t+主语？Eg:Heusedtobeveryrich,didn’the/usedn’the?②否定句+did/used+主语？Eg:Hedidn’tusetosmoke,did/usedhe?练习：①Mymotherused_________（tell）usstorywhenwewereyoung.()②Heusedto____shortand____shorthairwhenhewasyoung.()A.have;beB.be;haveC.be;beD.have;have【辨析】：辨析：usedtodosomething.，beusedtodosomething.与beusedtodoingsomething.1.usedtodosth.“过去常常做某事”(而现在已经不做了)，表示过去习惯性、经常性的动作或状态，和现在对比，暗示现在不做了。to为不定式符号，后跟动词原形。：Eg:IusedtogoshoppingonSaturdays,butnowInolongerdoso.过去我经常星期六去购物，但现在我不再那样了。2.beusedtodosomething.表示被动，“.....被用来做……”。Eg:Computersareusedtohelppeopledomanythings.电脑被用来帮助人们做很多事情。3.beusedtodoingsomething.“习惯于做某事”。to在这里是介词，后接名词或动名词。Eg:Theteacherisusedtogoingtobedlateintheevening.那个老师习惯于晚睡觉。练习：①.LiuHuan,afamousmalesinger,haslonghair,becausehe___________longhair.A.usedtohaveB.isusedtohavingC.isusedforhavingD.isusedtohave②.-Grandpahaschangedalot.-Sohehas.Hespendsmoretimethanheusedto_________gameswiththechildren.A.playB.playingC.playedD.plays【解析2】反意疑问句（见单元语法）2.A:What’shelikenow?他现在什么样子呢？B:He’stallnow.【解析】:What’ssblike?如果询问人的性格、人品时，多用Whatbe(am/is/are)…like?Eg:①—What’shelike?他是个什么样的人呢？—He’sfriendlyandkind.他友好善良。②—WhatisJohnlike?—Heisshy.【拓展】:如果询问人的外貌时，多用—Whatdo/doessb.looklike?答语为：①—主语.+be+形容词/②—主语.+beof+名词（指描述某人的体形、身材等）③—主语.+have/has+形容词+名词（指强调某人的体貌特征）Eg：—Whatdoesshelooklike?—Sheistall/Sheisofmediumbuild/ShehaslonghairtallSheisofmediumheight.short.thinSheisofmediumbuild.heavy.short/longhair.ShehasStraight/curlyhair.Red/black/blonde......hair练习：①I____mymotherandI______her.(）A.amlike;likeB.amlike;amlikeC.like;likeD.like;amlikes②－Howdoyou_______China?－Verymuch.()A.likeB.likesC.likedD.looklike3.friendlyadj.友好的【解析】：befriendlyto=begoodto=bekindto“对什么友好”练习：①.Tomysurprise,mybrothercanspeakEnglish_____.()A.livelyB.perfectlyC.badlyD.friendly②.It’sveryfriendly________himtohelpmewhenI’mintrouble.()A.ofB.withC.toD.in4.Shewasalwayssilentinclass在课堂上她总是很沉默。【解析】：silencen沉默→silent沉默；缄默；无声insilence沉默地、无声地=silentlykeepsilent保持沉默练习：①.Whenheheardthebadnews,Robertwalkedhometogetherwithhisfriends_______.（沉默地）②Weshouldkeep____inthelibrary.()A.silenceB.silentlyC.silences③Theystood____asamarkofhonortoher.()A.insilentB.insilenceC.Silence5.Shestillplaysthe_____fromtimetotime.她仍然时常弹____【解析】1.fromtimetotime=sometimes/attimes.时常，有时Eg:Shegoestothemoviesfromtimetotime.2.time短语:attimes=sometimes有时haveagoodtime玩得高兴havetimeefree有空allthetime一直atthesametime同时bythetime到……时候forthefirsttime第一次takeone’stime从容不迫3.句型”It’stimetodosth=It’stimeforsth是该做某事的时间了Ittakessb.sometimetodosth做某事花费某人多长时间s练习：①.Iknewitwasimpossibleforme____________________(按时上班)whenImissedthelastbus.②Tomdidn’tgotoschool_____thismorningbecauseheoverslept.()A.atonceB.ontimeC.byaccidentD.atpresent③.Asstudents,weshouldstudyhard,___________________it’simportantforustogetonwellwithothers.(同时)④.Theteacherhopeallofuscanhand____ourhomework____timeeveryday.()A.up;inB.out;onC.on;inD.in;on6.Shewasneverbraveenoughtoaskquestions.【解析】enough1.adj.“足够的“作表语和定语，修饰名词时，可放在名词之前或之后。Eg:Wehaveenoughtime__________(finish)thework.2.adv充分地，足够地修饰形容词和副词，放在形容词和副词之后。Eg:Mycoatisn’tnewenough.练习:①.Thismoviewasn’t______.Hefellasleephalfwaythroughit.()A.interestingenoughB.enoughinterestingC.interestedenoughD.enoughinterested②—Howdoyoulikethetalkshow?—Ithinkit’s________,butsomepeoplethinkit’sso________.()A.wonderfulenough;boredB.enoughwonderful;boringC.wonderfulenough;boring3.enough后跟动词要用动词不定式。即benot+enoughtodosth.练习：①.Hissisterisoldenough_______(go)toschool.②She’snotstrongenough___walkingupmountains.()A.togoB.goingC.goD.went7.helpfuladj.有用的；有帮助的【解析】helpv帮助→helpfuladj.有帮助的【拓展】:加后缀ful构成形容词的有skillskillful熟练的helphelpful有帮助的useuseful有用的forgetforgetful健忘的beautybeautiful美丽的carecareful仔细的wonderwonderful精彩的thankthankful感激的successsuccessful成功的painpainful疼痛的练习：①.Maryisso________—shecomestoyouwheneveryou’reintrouble.()A.usefulB.carefulC.thankfulD.Helpful②.Aftertherain,thevillagelooks_________________fromthetopofthehill.(wonder)【相关短语】:1.behelpfulto…对…有用练习：①..Alittlewinewillnotbe____toyourhealth.Justdon’tdrinktoomuch.()A.helpfulB.helplessC.harmfulD.Harmless2.helpsb.dosth.=helpsb.withsth.帮助某人做某事练习：①.Ican'tfindmypen.Couldyouhelp____________findit?()A.meB.herC.himD.them3.withthehelpofsb.=withone’shelp在某人的帮助之下练习：①..Billhasmadegreatprogress_____________thehelpofhisteachers.()A.forB.withC.Under②Withhisfatherhelp,Bobisbeginningtowritehisstories.()A.Bob’sfatheragreeswithhelpB.BobdoeswellinwritingC.Thankstohisfather’shelpD.Becauseofhisstories4.can’thelp