人教版八年级英语下册1-3单元知识点

同学们，新学期的英语学习又开启了新的篇章。八年级下册的前三个单元，我们将探讨健康、助人以及日常请求与提供帮助等贴近生活的话题。下面，我将和大家一起梳理这三个单元的核心知识点，希望能帮助大家扎实掌握，灵活运用。第一单元What'sthematter?本单元围绕“健康与建议”展开，学习如何描述身体不适以及给出合理的建议。核心词汇与短语*身体部位类：head,nose,throat,stomach,knee,foot(feet),back,neck,eye,ear*疾病与不适类：ache(头痛headache,胃痛stomachache),sore(喉咙痛sorethroat,背痛soreback),fever,cold,cough,toothache,trouble,matter,rest*常用短语：haveacold,haveafever,haveaheadache,haveastomachache,haveasorethroat,liedownandrest,drinkhotteawithhoney,seeadentist,takeone'stemperature,putsomemedicineon...,feelbetter,getanX-ray核心句型1.询问身体状况：*What'sthematter?/What'swrong?/What'sthetrouble?(你怎么了？)*What'sthematterwithyou?/What'swrongwithyou?/What'sthetroublewithyou?*AreyouOK?*Doyouhaveaheadache?2.描述身体不适：*Ihaveacold/fever/headache/stomachache/sorethroat.*Myheadhurts./Mystomachhurts.*Hecuthimself.3.给出建议：*Youshouldliedownandrest.*Youshouldn'teatanythingfortwohours.*Youshoulddrinklotsofhotwater.*Whydon'tyouseeadoctor?*You'dbettertakesomemedicine.*Maybeyoushouldseeadentist.语法焦点*情态动词should/shouldn't表建议：*Should用于提出正面建议，意为“应该”。其否定形式shouldn't表示“不应该”。*例句：Youshouldexerciseeveryday.Youshouldn'tsmoke.*反身代词：*常见反身代词：myself,yourself,himself,herself,itself,ourselves,yourselves,themselves.*用法：常作宾语或同位语，表示动作作用于自身或强调主语本人。*例句：Hehurthimself.(宾语)Imyselfdidit.(同位语，强调“我自己”)*不定代词something,anything,nothing：*Something用于肯定句或希望得到肯定回答的疑问句中。*Anything用于否定句、疑问句或条件句中。*Nothing表示否定意义。语用提示*关心他人时，除了问"What'sthematter?"，还可以说"Areyoufeelingbetternow?"(你现在感觉好点了吗？)*在提建议时，使用"Whydon'tyou...?"或"Howabout...?"比直接用"Youshould..."语气更委婉一些。第二单元I'llhelptocleanupthecityparks.本单元主题是“志愿服务与助人为乐”，学习如何表达意愿、计划以及描述志愿活动。核心词汇与短语核心句型1.表达志愿意愿和计划：*Iwanttohelpcleanupthecityparks.*Shedecidedtotryoutforavolunteerafter-schoolreadingprogram.*HevolunteersatananimalhospitaleverySaturdaymorning.*I'dliketohelphomelesspeople.*Theyplantosetupafoodbank.2.描述志愿活动内容：*We'regoingtocheerupsickkidsinthehospital.*Theyhelpedtogiveoutnewbookstothechildreninthecountryside.*I'mmakingsomesignstoputuparoundtheschool.*Thevolunteersoftenvisittheoldpeople'shometotalktothem.3.谈论影响与感受：*Itmademefeelveryhappy.*Hegetssuchastrongfeelingofsatisfactionwhenheseestheanimalsgetbetter.*YouhelpedtomakeitpossibleformetohaveLucky.语法焦点*动词不定式(Infinitive)：*结构：to+动词原形(有时to可以省略，如在使役动词let,make后，或感官动词see,hear等后作宾补时)。*用法：本单元重点学习不定式作宾语、状语和宾语补足语。*作宾语：decidetodosth.,wanttodosth.,hopetodosth.,plantodosth.,volunteertodosth.,wouldliketodosth.*作状语：表目的、结果或原因。例句：Iwenttheretoseemyfriend.(目的)*作宾语补足语：asksb.todosth.,tellsb.todosth.,wantsb.todosth.,helpsb.(to)dosth.*短语动词(PhrasalVerbs)：*短语动词通常由“动词+介词/副词”构成，其意义往往不是单个词的简单相加，需要整体记忆。有些短语动词是及物的，有些是不及物的；有些接宾语时，宾语可放在中间（若为代词则必须放中间），有些则只能放在后面。*例句：Cleanuptheroom.=Cleantheroomup.Cleanitup.(不能说Cleanupit.)语用提示*表达自己想做某事时，可以用"I'dliketo..."(我想要...)或"Ifeellike..."(我想...)，它们比"Iwantto..."更委婉或口语化一些。*在描述过去的志愿经历时，注意使用一般过去时。第三单元Couldyoupleasecleanyourroom?本单元围绕“家务劳动与日常请求”展开，学习如何礼貌地提出请求、寻求帮助以及拒绝请求。核心词汇与短语*家务劳动类：chore,dochores,clean(one'sroom),sweep(thefloor),takeout(therubbish),makethebed,fold(theclothes),dothedishes,cleanthelivingroom,watertheplants,takecareof,lookafter*常用短语：dothedishes,takeouttherubbish,makethebed,foldtheclothes,sweepthefloor,cleanthebathroom,gooutfordinner,stayoutlate,getaride,helpoutwithsth.,atleast,inorderto,dependon,takecareof,lookafter,asaresult核心句型1.礼貌请求：*Couldyoupleasecleanyourroom?(你能打扫一下你的房间吗？)*CouldIborrowyourdictionary?(我能借一下你的字典吗？)*Couldyoupleasenotplaysoccerhere?(你能不在这儿踢足球吗？)*Wouldyoumindhelpingme?(你介意帮我一下吗？)2.回应请求(同意/拒绝)：3.寻求允许：*CouldIgooutwithmyfriendstonight?(我今晚能和朋友们出去吗？)*Mom,canIwatchTVafterdinner?4.谈论家务分工与责任：*Weshouldsharethehousework.*Doingchoreshelpstodevelopchildren'sindependence.*Parentsshouldteachkidshowtodochores.语法焦点*情态动词could表委婉请求：*Could用于提出请求时，语气比can更加委婉、礼貌，常用于对陌生人、长辈或不太熟悉的人。*例句：Couldyoupleasepassmethesalt?CouldIuseyourphone?*情态动词can/may表允许：*Can/MayI...?用于征求对方允许自己做某事。Can较口语化，May更正式一些。*例句：CanIopenthewindow?MayIleaveearlytoday?*make/let等使役动词的用法：*makesb.dosth.让某人做某事(被动语态：sb.bemadetodosth.)*letsb.dosth.让某人做某事(let一般不用于被动语态)*例句：Mymommakesmecleanmyroomeveryday.Let'sgotothepark.*连词while与until：*while：当……时候(引导时间状语从句，强调主从句动作同时进行，从句常用进行时)；然而(表对比)。*until：直到……为止(引导时间状语从句，主句动词若为延续性动词，用肯定式；若为短暂性动词，用否定式，即not...until...)。*例句：IwasdoingmyhomeworkwhilemybrotherwaswatchingTV.(同时进行)Hedidn'tgotobedunti