九年级英语下册精美实用教案第7讲-9bU4LifeonMars（上）简单句复合句Ⅱ-教师版

主题9BU4LifeonMars(上)及简单句复合句Ⅱ教学内容知识点1：重要单词词组1、词性变换(1)crowd(n.)--_______________(adj.)(2)pollute(v.)--_______________(n.)--_______________(adj.)(3)rapid(adj.)--_______________(adv.)(4)increase(n.)--_______________(v.)(5)comfortable(adj.)--_______________(adv.)--_______________(反义词)(6)taste(v.)--_____________(n.)--____________(adj.)--______________(比较级)--____________(最高级)--_____________(adj.)--_______________(反义词)(7)special(adj.)--_______________(adv.)(8)challenge(n.)--_______________(v.)--_______________(adj.)(9)develop(v.)--_______________(n.)--_______________(adj.)--_______________(adj.)Keys:1.crowded2.pollution;fortably;uncomfortable6.taste;tasty;tastier;tastiest;tasteful;tasteless7.specially8.challenge;challenging9.development;developed;developing批注：讲解词性转换时可以给学生讲解一下在词汇题里面如何运用区分不同的词性2、重要词组(1)氧气罐_____________________________(2)干粮_____________________________(3)睡袋_____________________________(4)电源包_____________________________(5)到2100年时_____________________________(6)人口上的快速增长____________________________(7)再；重新_____________________________(8)以...的速度_____________________________(9)以...的形式_____________________________(10)到火星的旅行_____________________________(11)漂浮到太空中___________________________(12)与…相比_____________________________(13)在某些方面_____________________________(14)与...什么连接_____________________________Keys:airtankdriedfoodsleepingbagpowerpackbytheyear2100therapidincreaseinpopulationalloveragainata/heformof...thejourneytoMarsfloatoffintospacecompare…with…insomewaysconnectto...批注：词组部分可以让学生自己默写一下。知识点2：重点词组用法1.thinkaboutthinkabout考虑，想起thinkof考虑；记起；想起thinkover仔细考虑thinkup想出，发明注意：Whatdoyouthinkof…?你觉得…怎么样？批注：给学生重点强调thinkof和whatdoyouthinkof的区别2.population人口当population作为具体的人时，是复数。如果是人的数量，用法和number类似，数量分大小，所以只有large/smallpopulation.批注：一般选择题中会考查population作主语时的主谓一致原则。3.atthespeedof以……速度Thatnighthedrovethecaratthespeedof200kmperhour.那天晚上他以每小时200千米的速度驾驶。类似的短语：atthepriceof以……价格atahighprice高价atalowcost低成本atfull/highspeed全速/高速批注：注意介词at的选择4.increasev.增加increaseby+倍数或百分数表示“增加了……”increaseto+具体的数字表示“增加到……”increasein…在……方面的增长Thepopulationofthistownhasincreasedby5percent.Thepopulationofourcountryhasincreasedto1.3billion.批注：让学生自己翻译以上两句话，注意increase后面跟介词by,to,in的区别5.comparev.比较(1)compare…with…把…和…比较Ifyoucomparehisworkwithhers,youwillfindhersismuchbetter.如果你把他的工作和她的做比较，你会发现她的好得多。(2)compare…to把……比作……Poetshavecomparedsleeptodeath.诗人将睡眠比作死亡。批注：compare一般在动词填空题或者选择题中考的比较多，要提醒学生特别注意。下面重点句型中会具体讲解compared和comparing的区别。6.insomeways在一些方面；在某种程度上way的相关短语intheway挡路，妨碍inthisway用这种方式bytheway顺便问一下onthewayto在去…的路上批注：way相关的短语需要学生重点掌握。7.speciallyadv.特别地要注意specially和especially的区别(1)especially是副词，意为“尤其”、“特别”，通常用来对前面所述的事件进行进一步的说明或补充。It'sespeciallyhottoday.今天天气特别热[表示与前几天天气很不一样，不用specially]Helikesallsubjects,especiallyEnglish.他喜欢所有的学科，尤其是英语[表示喜欢英语的程度很多，不用specially](2)specially也是副词，意为“专门地”“特地”，表示“不是为了别的，而只是为了……”，强调唯一目的。Hecameherespeciallytosaysorrytoher.他特意来这里向她道歉。Hereturnedtoherhometownspeciallytoseehersickmother她回到家乡专门看望生病的母亲。批注：考试时会中会考查specially和especially的区别，需要重点讲解8.preventsbfromdoing阻止某人做某事相当于stopsbfromdoing，from可省略。Wecannotprevent/stopanearthquakefromcoming.我们不能阻止地震的到来。批注：preventsb.fromdoing=keepsb.fromdoing=stopsb.fromdoing,其中keep词组中的from不能省略9.challengingadj.挑战性的Mikefoundachallengingjobasacomputerprogrammer.challengechallenge…to…向某人挑战Myfatherchallengedmetoatabletennisgame.父亲向我挑战一场乒乓球赛。批注：challenge主要是单词的拼写容易出错。知识点3：重点句型用法1.HowdoyoulikelifeonMars?(P50)你觉得火星上的生活怎么样？Howdoyoulike…?常用来询问对方对某人或某一事物的看法、感受、印象如何。表达这一意思时还可以说Whatdoyouthinkof…?批注：此句型在情景对话中考查较多，会让学生根据答句选问句或者根据问句选答句。2.IthoughtyoulikedMars.(P50)我本以为你喜欢火星。thought是think的过去式，在此处表示“本以为”，一般在动词填空题里会涉及到。批注：此用法在动词填空题里会考到，不会出现明显的时间状语，要提醒学生根据语境判断。3.WhatwoulditbeliketoliveonMars?(P51)住在火星上将会是什么样子呢？Whatwill/wouldsth.belike这是What’ssth.like的将来时句型。需要注意此句型在宾语从句中要改为Whatsth.will/wouldbelike.批注：此句型一般在宾语从句中考察的比较多。4.SomepeoplebelievethathumanscouldliveontheplanetMarsbytheyear2100.(P52)一些人相信人类到2100为止能够居住在火星上。by+过去时间用于过去完成时by+将来时间用于一般将来时批注：注意by后面跟不同的时间用于不同的时态中。5.Ourownplanet,theEarth,isbecomingmoreandmorecrowdedandpollutedbecauseoftherapidincreaseinpopulation.(P52)我们自己的星球，地球，由于人口的快速增长将会变得越来越拥挤。比较级and比较级表示“越来越……”becauseof+名词短语increasein…在…方面的增长批注：对于基础比较薄弱的学生可以补充讲解一下形容词的比较级的其他句型。6.ItishopedthatpeoplecouldstartalloveragainandbuildabetterworldonMars.(P52)人们希望能够在火星上重新开始并且建立一个更美好的世界。Itis+过去分词句型Itissaid…据说Itisbelieved…据相信批注：此处it是形式主语，真正的主语是后面的that从句。5.Atpresent,ourspacecraftaretooslowtocarrylargenumbersofpassengerstoMars-itwouldtakemonths.(P52)目前，我们的宇宙飞船太慢而不能运送大量的乘客去火星，这要花费数月的时间。(1)too…to…太…而不能….注意和…enoughto的句型转换Heistooshorttoreachtheapplesonthetree.=Heisnottallenoughtoreachtheapplesonthetree.(2)anumberof…大量的，后面跟可数名词复数thenumberof……的数量批注：注意这两个词组作主语时谓语动词的单复数。6.Withthedevelopmentoftechnology,bytheyear2100,thejourneymightonlytakeabout20minutesinspacecraftthattravelatthespeedoflight!(P52)随着技术的发展，到2100年，坐飞船以光速旅行只需要花费大约20分钟的时间。with表示伴随着withthehelpof…在…的帮助下withthesupportof…在…的支持下注意with和under,through的区别through/by表“用交通工具”或表“发出某动作”；on/in表用某交通工具；with用具体的“工具、材料”或伴随“抽象事物”；in用原料或语言；through通过具体过程，途径，手段，中介批注：考试时一般会把with,under,by,through等表示方式的介词放在一起判断。7.Humancannotsurvivewithoutwater,oxygenorfood.(P52)人类没有水、空气或食物无法生存。本单元的语法讲的是简单句与省略句的转换，所以此处就等于Humancannotsurviveifthereisnofood,wateroroxygen.8.ThegravityonMarsisonlyaboutthree-eighthsofthatontheEarth.(P53)火星的重力只有地球的大约八分之三。分数的表达法分数表达法：分子是基数词，分母是序数词，如果分子大于1，分母要用复数形式，在分子与分母之间可加连字符也可不加连字符。分数+of+名词结构作主语时，谓语动词的单复数视of后面的名词而定，如果名词是复数，谓语动词用复数形式；如果名词是单数或不可数名词，谓语动词用单数形式。Onethirdofthewaterisdirty.Twothirdsoftheworkersinourfactoryareyoungpeople.批注：学生需要掌握分数的表达以及分数在主语中时主谓一致的判断。9.ComparedwithlifeontheEarth,lifeonMarswouldbebetterinsomeways.(P53)与地球上的生活相比，火星上的生活在某些方面要好些。过去分词短语comparedwithlifeontheEarth在句中作状语。主语是life与compare之间是被动关系，所以compare需要用过去分词；如果life与compare之间是主动关系，则compare用动名词形式。Comparingthepricesofshoesinthreeshops,shedecidedtochoosethecheapestone.批注：此处要重点和学生强调compared和comparing的区别，可以结合下面一句话一起讲解。10.Everystudentwouldhaveacomputerathomeconnectedtoaninterplanetarynetwork.(P53)每个学生家里都有一台电脑与星际网络连接。过去分词短语connectedtoaninterplanetarynetwork在句中作定语，修饰前面的computer.connect…to…意为：把……连接在……上，……与……连在一起。此处connectedtoaninterplanetarynetwork是过去分词短语，作后置定语修饰名词computer。这里的名词computer与动词connect是动宾关系，故动词用过去分词形式。如果被修饰的名词与动词之间是主谓关系，则用该动词的现在分词形式。TherailwayconnectingShanghaitoTianjinisunderconstructionnow.11.LifeonMarswouldbeinterestingaswellaschallenging.(P53)火星上的生活，不仅有挑战性，还很有趣。aswellas不但......而且，既......又注意：这一短语在译成中文时，应先译aswellas后面的内容，再译前面的。Heaswellashisfriendslikesgoingshopping.批注：当aswellas与主语连用时，在意义上强调前者，谓语动词应与其前的主语保持一致。简单句和复合句之间的转换（二）1.含有状语从句的复合句与简单句之间的转换在英语中，我们可以用attheageof,becauseof,without...等介词短语，将含有状语从句的复合句改为简单句。Helearnttoswimwhenhewaseightyearsold.→Helearnttoswimattheageofeight.Hecouldnotgotothepartybecausehehadtoomuchhomework.→Hecouldnotgotothepartybecauseoftoomuchhomework.Hecannotsolvethisproblemifhehasnohelp.→Hecannotsolvethisproblemwithouthelp.注意：转换时要注意时态和意思的一致性和准确性。2.含有宾语从句的复合句与简单句之间的转换在英语中，我们可以用of...,like...等介词短语，将含有宾语从句的复合句改为简单句。ThephotosremindmethatItravelledtotheUKfiveyearsago→ThephotosremindmeofmytriptotheUKfiveyearsago.AreyoucertainthatTomissatisfiedwiththeplan?→AreyoucertainaboutTom’ssatisfactionwiththeplan?注意：常用的一些动词和介词的搭配有：remindsomebodyof...besure/certainabout...3.含有定语从句的复合句与简单句之间的转换在英语中，我们可以用with...,in....等介词短语，将含有定语从句的复合句改为简单句。Doyouknowthegirlwhoisholdingtwobooksinherhand?→Doyouknowthegirlwithtwobooksinherhand?ThemanwhowearsablueshirtisourEnglishteacher.→ThemaninablueshirtisourEnglishteacher.考点一：宾语从句的关系词、语序、时态例1:Didyourfathertellyou______?A.whenhetravelledtoHongKong B.howhegoestoShanghaiC.wherehehasspenthisholidays D.whydidhevisitHangzhou答案：A批注：作宾语从句一般使用排除法，根据did用时态排除B、C,再根据语序排除D，正确答案为A。例2:Idon’tknow_______thedayaftertomorrow.A.whendoeshecome B.howwillhecome C.ifhecomes D.whetherhe’llcome 答案：D批注：先根据语序排除A、B，再根据时间状语thedayaftertomorrow排除C，正确答案为D。例3:Parentscaremoreabout_____pocketmoneytheyshouldgivetheirchildrenand________.A.howmuch;whereitgoes B.howmany;wheredoesitgoC.howmuch;howdoesitgoes D.howmany;howitgoes答案：A批注：根据pocketmoney排除B、D,再根据语序排除C。例4:—Howlongdoesittaketogettotheairport?—Fortyminutes.Butit’sfoggytoday.I’mnotsurethehighwaywillclosessoon.Let’ssetoffearlier.A.whether B.when C.how D.why答案：A批注：本题考查的是关系词，根据soon可知不可能是when,排除B，根据句意可知我不确定的是高速公路是否会关闭，所以应该选A。考点二：定语从句的关系词以及在动词填空题中的运用例1:--ThevolunteersaredoingagreatjobinYushu.(2010扬州)

--Yes.Theyarehelpingthepeople___aresufferingfromtheearthquake.(2010扬州)A.which

B.what

C./

D.who答案：D批注：定语从句在初中阶段一般只考查that,who,which,when,where,why的用法，此处先行词是thepeople,带入从句作主语，用who或that,答案选D。例2:Theywanttodevelopakindadog-friendlyfood____willhelpdogownerscooldowntheirpets.(2010常州)A.who

B.what

C.which

D.whether答案：C批注：此处先行词是food,带入从句作主语，用which或that,答案选C。例3:—IlikethephotoItookonthebeachyesterday.Whatdoyouthinkofit?—Well,reallynice!A.where B.when C.which D.who答案：C批注：此处先行词是photo,带入从句作宾语，用which或that,答案选C。例4:Thecharityshowhedevotedmuchtimeto__________(prove)tobeasuccess.答案：proved批注：分析句子结构可知，hedevotedmuchtimeto是定语从句修饰thecharityshow,prove是谓语动词，根据devoted可知用过去时。此类题目老师要提醒学生做题时要注意分析句子结构再下笔。例5:Theboyhisteacherpaidmuchattentionto___________(improve)alotinthetestatlast.答案：improved批注：histeacherpaidmuchattentionto是定语从句修饰theboy,所以improve是作谓语动词，根据atlast可知用于过去时，答案为improved。一、单项选择1．—________theway,doyouthinkthisjobhasbecomeeasierthanitusedtobe?—Tobehonest,ithasturnedouttobemoredifficult________someways.A．In;on B．By;on C．By;in D．In;by2．MrsYangoftenmakes________cakesandbiscuitsforkidsandkidslikethemverymuch.A．strange B．tasty C．awful D．polluted3．Don’talways________yourdaughter________others.It’snotgoodforhergrowth.A．compare;from B．connect;to C．compare;with D．prevent;from4．—Whatisthe________ofhighschoolstudentsgoingtocollege?—About70%.A．percentage B．number C．population D．temperature5．LiLing’smotherwantedtoknow________.A．howdidshestudyatschool B．whatshehasstudiedatschoolC．whetherdidshestudyhardatschool D．ifshestudiedhardatschool6．—Thisreddresslooksso________!—Itis________designedforafamousactress.A．special;special B．special;specially C．specially;special D．specially;specially7．Idon’tknowwhatshould________tostopthefactories________thelakenearthem.A．todo;polluting B．todo;topollute C．doing;topollute D．bedone;polluting8．WhenIwasyoung,I________inthecountry.A．usedtolive B．wasusedtolive C．usedtoliving D．amusedtoliving9．Perhapswewillliveonthefood________theformofpillsinthefuture.A．on B．in C．at D．by10．Heiswearinghissunglassestohimselffromthestrongsunlight.A．prevent B．stop C．keep D．protect11．Uptonow,almost________ofthestudentsintheclasshavecompleted________oftheirwork.A．two-thirds;60percents B．two-thirds;60percentC．twothird;60percents D．twothird;60percent12．—Wasthebabyreallyamazedwhenseeingsucha________scene?—Yes.The________lookonitsfacetoldusthatitwas.A．surprised;surprising B．surprising;surprisedC．surprising;surprising D．surprised;surprised13．Noonecanbesure________inthousandsofyears,nottosayinamillionyears.A．whatmanlookslike B．whatwillmanlooklikeC．whatdidmanlooklike D．whatmanwilllooklike14．Thegirlseemedtoobusy__________hertest_________hermotherentertheroom.A．preparing,tonotice B．toprepare,tonoticeC．preparing,noticing D．toprepare,noticing15．—Areyouconfidentaboutthisevening’sperformance,Kate?—________.I’mwellprepared.A．Ihopeso B．It’shardtosay C．Sure,Iam D．Iamafraidnot答案：1．C2．B3．C4．A5．D6．B7．D8．A9．B10．D11．B12．B13．D14．A15．C六、用所给单词的正确形式填空51．Thestreetsaremuch________(crowd)atweekends,soweshoulddrivemorecarefully.52．Thedishesintherestaurantarevery________(taste).Allofuslikethemverymuch.53．—Isthereany________(possible)thatyou’llbebackbytheweekend?—Sorry,Idon’tknow.54．Sofar,________(travel)intospaceisstilldifficultanddangerousforhumans.55．Thejourneytothatcitywasvery________(comfort).Theyallwantedtohaveagoodrest.56．Doingtoomuchexercise________(notimprove)ourstudyasgreatlyasthought.57．—TurnofftheTV,please.Thebabyissleeping.—Thereisnoneed.He________(wake)up.58．Iinsistonyourstudyingabroad.I’msureyou________(impress)deeplynotonlybytheteachingstyleintheuniversitybutthewonderfulsights.59．—Haveyoumovedintoyournewhouse?—YouknowmyhusbandandI________(decorate)itallthepastyear,butthereisstillsomethingincomplete.60．It’ssaidthattheresultofthetestallthestudentsarelookingforwardto________(announce)yesterday.61．Thespecialbootscanpreventusfrom________(go)hereandthereintheair.62．MrSmith,togetherwithhistwosons,________(plant)sometreesonthehillwhenitbegantorainheavily.63．Bynextweek,we________(learn)20Englishsongs.WhataboutrecordingaCDthen?64．Thetypeofnewcars________(notproduce)inWuxiuntil2019.65．Themurderers________(arrest)twodaysago.Thenewsisnotthelatest.七、完成句子66．我们被要求在市内开车时的时速不得超过每小时三十千米。Wearerequestedtodrive______________________nomorethanthirtykilometersperhourinthecity.67．这个男孩在某些方面变得比以前好多了。Theboyisbecoming______________________.68．这台电脑与国际网络连接在一起。Thecomputer________________________________aninternationalnetwork.69．人们希望在火星上能够从头再来。It_______________________________________onMars.70．未来的生活可能就是这样的。Suchis_______________________________inthefuture.八、根据汉语提示填空71．Allthe________(乘客)ontheplanewerefrightenedwhentheyheardthatabirdhadflownintotheengine.72．Amotheriswillingtotakethe________(风险)ofherownlifetoprotectherchild.73．MyfatherworksinLenovoasan________(电子的)engineer.74．An________(外星人)wentoutfromaUFOandwalkeddownCentreStreet.75．Therearedifferentdesignsof________(头盔)tochoosefrom.51．morecrowded52．tasty53．possibility54．travelling55．uncomfortable56．doesn’timprove57．haswoken58．willbeimpressed59．weredecorating60．wasannounced61．going62．wasplanting63．willhavelearned64．won’tbeproduced65．werearrested66．ataspeedof##atthespeedof67．muchbetterthanbeforeinsomeways68．isconnectedto69．ishopedthatpeoplecouldstartalloveragain70．whatlifemaybelike71．passengers72．risk73．electronic74．alien75．helmets完形填空MaximeandLiseareayoungFrenchcouple.TheyarereadytotravelacrossChinafromBeijingtoYunnanProvinceonatandembicycle（双人自行车）.Theyhavetwomainpurposesandoneofthemisthattheywanttoencouragegreen_16_throughit.Maxime,26,workshelpingfarmersraisetheircows,_17_hiswifeLise,26,isateacher.ThetwoalsolikesharingtheirtravelstoriesonFacebook.“Wechooseatandembicyclebecauseitmakesit_18_tocommunicatewitheachotheraboutinterestingpeopleandthingswecomeacrossduringthejourney._19_,bicyclingishealthier.Andit’sacheaperandmoreenvironment-friendlywayoftravelingthan_20_cars,motorsandsoon,”thecouplesaid.Asfortheother_21_oftheirjourney,thetwosaidtheywantedtogetpeople’sgoodideasontopicssuchashealth,economy（经济）andpolitics.Whentheywereasked_22_theychosetovisitChina,theysaiditwasbecausetheyoftentalkedaboutitslonghistoryandbeautyandhowmuchofthecountryiscompetitive（有竞争力的）intheworld.“WeknowChinaisacountrywithalargepopulationandwillbethe_23_oftheeconomyaroundtheworldinthefuture.Wewanttogetabetterunderstandingofthecountryanditspeople.We_24_thecountry,”theysaid.ThecouplewillbeontheirjourneytoChinasoon.Wehopetheycanmakemorepeoplefurther__25__Chinabysharingwhattheyseeandhearontheway.Meanwhile,wehopetheyenjoytheirtravelinChina.16．A．food B．farming C．travel17．A．while B．though C．because18．A．busier B．easier C．earlier19．A．Besides B．Instead C．However20．A．buying B．using C．making21．A．order B．result C．purpose22．A．how B．why C．when23．A．leader B．player C．learner24．A．need B．miss C．love25．A．dreamabout B．hearabout C．knowabout三、阅读单选Somepeoplehaveaverypoorsenseofdirection．Unluckily，Iamoneofthem．IhavevisitedaplacemanytimesbutImaystillgetlosttherethenexttime．WhenIwasalittlegirl，Ineverdaredtoaskstrangerstheway．AndsoIusedtowalkroundincircleandhopethatbychanceIwouldgettotheplaceIwasgoingto．Now，Iamnolongertooshytoaskpeoplefordirections，butIoftenreceivehelplessorevenwronginformation．SoItrytoavoidgivingpeoplewrongdirections．Ifanyoneasksmethewaysomewhere，Iwouldsay，"sorry，Iamastrangerhere．"Onceonmywaytowork，Iwasstoppedbyaman．HeaskedmeifIcouldtellhimthewaytotheFriendshipBuilding．Igavehimmyusualreply．ButjustasIwalkedononlyafewsteps，Irealizedthathehadaskedthewaytomyofficebuilding．However，Ihadnotimetoturnbackandlookforhim．IwasrushingtomeetwithsomeoneatmyofficeandIdidn'twanttokeephimwaiting．WhenIjustgottomyoffice，thesecretaryshowedinthemanwhohadaskedmefordirections．ImaginehowembarrassedIwasandhowsurprisedhewaswhenwesaweachotheratthefirstsight!26．Thewriteralwaysrefusestogivepeopledirectionsbecause．A．sheisastrangertothecity B．shedoesn'tknowthepeopleC．shehasnotimetohelpothers D．she'safraidofgivingwrongdirections27．Amanstoppedthewriteronthewayto．A．sellhersomething B．askherthetime C．makefriendswithher D．askforthedirection28．TheFriendshipBuildingistheplacewherethewriter．A．lives B．studies C．works D．teaches29．Theword"embarrassed"inthelastparagraphmeans""．A．尴尬的 B．困惑的 C．激动的 D．拮据的30．WhichofthefollowingisTRUEaccordingtothepassage？A．Thewriteristooshytogiveothersdirections．B．Thewriterhasaverypoorsenseofdirection．C．Thewriternevergotlostwhenshewasyoung．D．Themanwasquitenervouswhenhesawthewriter．四、阅读填表Therearemanythingsyoucandotoimproveyourmemory.Amongthemaremanykindsofusefulwaysaswellastakingspecialcareofyourhealth.Itisimportantthatyoumakeyourselfexcitedtomakeyourmemorymoreactive.Youcandothisbydoingsomenewactivitiesandbychangingyourdailyhabits.Learninganewskillhelpsyourbraintodevelop.Whentryingtoremembersomething,youshouldpayspecialattentiontothemostimportantthingsaboutit.Donotallowotherthoughtstoenteryourmindbecausetheywillreduceyourchancesofmakingrightmemories.Anexcellentwaytohelpimprovememoryistoconnectinformationwithpictures.Trytoseethepicturesinyourmind.Takingnotesandkeepingadiarywillalsobehelpful.Healthyfoodandplentyofvitaminsarenecessaryforyourmemorytoworkwell.Drinkingalotofwateralsohelpskeepyourmemory.Youmustallowyourbraintohaveenoughsleepandrest.Whenyouaresleeping,yourbrainstoresmemories.Notenoughsleepcancauseproblemswithstoringinformation.Andbeingtiredwillalsostopyoufrombeingableto