新版八年级英语下册第三单元知识点归纳

新版八年级英语下册第三单元知识点归纳Unit3couldyoupleasecleanyourroom?Peter,couldyoupleasetakeoutthetrash?彼得，你能把垃圾倒了吗？couldyoupleasedosth?请你（做）......好吗？用于提出请求，希望得到对方的肯定回答，说话的语气比较客气委婉。could不是can的过去式，是委婉、礼貌的说法。回答用can.【常用答语】肯定回答：Sure./ofcourse./certainly./Noproblem.否定回答：Sorry,Ican’t2、takeout取出（v+adv）【注】:跟代词做宾语，代词放中间；跟名词做宾语，可放在中间，也可放在后边Histeethhurtbadly.Thedentisttakethemout.【短语】takeoutthetrash倒垃圾takeawalk散步takeaway拿走，取走takeback收回takeplace发生takeoff脱下；起飞3.canyoudothedishes.？那你可以洗盘子吗？dothedishes洗碗【结构1】dothe+名词：dothedishes/laundry洗餐具/衣服【结构2】dothe+动词-ingdothecleaning打扫卫生【结构3】doone’s+名词doone’shousework/homework做家务/家庭作业【结构4】dosome+动词-ingdosomereading/shopping读写书/购物couldIatleastfinishwatchingthisshow?至少让我看完这个节目可以吗？】couldIdoasth?我可以做......吗？用于表达请求，语气比较委婉。couldIgooutwithmyclassmatethisweekend?2】atleast至少，多指数量或程度上的最低限度。atmost至少，不超过Nowallofusexerciseatleastanhouradayandoutsideschool.3】finishv结束；完成finishdoingsth做完某事—canyoufinish__reading__thesebooksbefore10o'clock?—yes,Ican.5、IthinktwohoursofTVisenoughforyou!我觉得你看两个小时的电视已经足够了。】twohoursofTV表示时间、距离、金额、度量等词语作主语时，通常被视作整体，谓语动词用单数形式。Howtimeisflies!Threeyears__is_____reallyashorttime.足够的，充分的（在句中作定语或表语）【解析2】enoughIdon’thaveenoughmoneywithme.足够；充分（放在形容词；副词后）Theriverisdeepenoughforswimming.【记】mr.Smithhasenoughmoney,butheisn’tkindenoughtohelpothers.【注意】enough修饰名词时，置于名词前；修饰形容词时，置于形容词之后。6、couldyoutakeouttherubbish,foldtheclothesanddothedishes?你能把垃圾倒了。把衣服叠好，再把碗洗了吗？【解析】takeout拿出；取出take的用法：Pleasetakesomebookstotheclassroom.Takethismedicinethreetimesaday.takeTheyusuallytakethebustowork.Ittakesmetwohourstodomyhomeworkeveryday.【拓展】take构成的短语：takeawalk去散步takearest休息takecareof照顾takeoff脱下；起飞takeup占据takedown拿下takeone’stime不急；慢慢来takeone’stemperature量体温7.TheminuteIsatdowninfrontoftheTV,mymomcameover.我刚坐在电视机前面，我妈妈就过来了。【解析1】theminute=assoonas“一......就......”Pleasewritetometheminuteyougetthere.【解析2】infrontof指在物体外部的前面Thereisabikeinfrontoftheclassroom.【辨析】指在物体内部的前面ourteacherisstandinginthefrontoftheclassroom【记】Thedriversat_____inthefrontof___________thecar.Thepolicemanstood___infrontof________thecar.【注意】有the无the区别大：attable吃饭；进餐inhospital住院atthetabel在桌边inthehospital在医院（不一定看病）【解析3】comeover过来【拓展】come短语：comeacross（偶然）发现comeback回来comeupwith想出cometrue实现comedown下来comefrom=befrom来自,出生于comein/into进入,进来comeon赶快,加油comealong走吧,过来,快点comeandgo来来去去comeup上来comeout出来，开，冲洗出来7.youwatchTVallthetimeandneverhelpoutaroundthehouse!你总是看电视，从不帮忙做家务！allthetime=always一直；总是8.I’mjustastiredasyouare!我和你一样累！【解析】as...as...和......一样......9.Foroneweek,shedidnotdoanyhouseworkandneitherdidI.一周的时间，她不做任何家务，我也不做。【解析】neither+助动词/系动词/情态动词+主语“某人（主语）也不”⑴neither两者都不neither…nor…既不…也不…,连接两个词做主语，谓语动词由后一个主语确定NeitherTomnorjimisastudent⑵表达“…也不……”则用“Neither/Nor+be/V助/V情+主”—Thefirstonewasn’tbad.—Neitherwasthesecond.0.Thenextday,mymomcamehomefromworktofindthehousecleanandtidy.第二天，妈妈下班回到家后发现房间很干净、整洁。【解析】find+宾语+宾语补足语【注】find→found→foundv寻找findsb.doingsth发现某人做某事findit+adj.+todosth发现做某事很……◆finditdifficult/hardtodosth发现做某事很困难Shefound_it__hardtofinishtheworkbyherself.1.Sheaskedinsurprise.她吃惊地问道。【解析】insurprise惊奇地；吃惊地surprisev使吃惊→surprisingadj.令人吃惊的→surprisedadj.吃惊的toone’ssurprise使某人吃惊的是insurprise吃惊地besurprisedat对……感到吃惊Tomysurprise_人做主语，sb.needtodosth某人需要做某事物做主语，sthneeddoingsth=sthneedtobedone①Studentsneed___tohave_______agoodrestinstudying.②Thewatchneeds__mending___.用于否定句或疑问句，是情态动词needn’t=don’thaveto没有必要need,must引导的一般疑问句，肯定会的用must,否定回答用needn’t—mustIgotherenow?—yes，youmust/No,youneedn’t【解析2】share分享；共用sharesth分享或共用某物sharesthwithsb.与某人分享某物borrow借入,与from连用，尤指主语“【借进来”】borrowsthfromsb.从某人那里借某物youcanborrowthebookfromthelibrary.lend借出,与to搭配【指借出去】lendsbsth=lendsthtosb把某物借给某人Hedoesn’twanttolendhisbooktoothers.keep保留，保存（延续动词，可以与表示一段时间的状语连用）【指借一段时间】【记】Iwantto__borrow__abikefrommyfriendbuthedidn’t_lend___ittome,becauseTomhad_kept____itfortwodays.6.IcutmyfingerandI’mtryingnottogetitwet.我的手指割伤了，伤口不能弄湿。【解析】trytodosth努力（不）做某事。tryv试图，设法，努力【拓展】tryon试穿trytodosth努力做某事【侧重尽力做】trydoingsth试图做某事【侧重尝试做】tryone’sbesttodosth=doone’sbesttodosth尽某人最大努力做某事7.Ihatetodochores.我讨厌做家务。hatetodosth讨厌做某事,表示某次具体行为或动作。Ihatetotroublehim.hatedoingsth不愿意做某事表示经常或习惯性行为或动作。Shehatessmokinginherroom.8.couldIaskyoutohelpmewithsomechoresthen?那我能请求你帮我做些杂活吗？【解析】asksb.todosth要求某人做某事。askfor请求，要某物asksb.aboutsth向某人询问关于某事asksb.forhelp向某人请求帮助asksb.todosth请求某人做某事ask构成的短语：短语含义asksb.todosth请某人做某事asksb.nottodosth不让某人做某事asksbforsth向某人要某物askforhelp寻求帮助9.I’llfinishmyhomeworkwhileyouhelpmewiththedishes.当你帮我洗盘子的时候，我将完成我的家庭作业。【解析1】finishdoingsth完成某事—canyoufinish_reading__thesebooksbefore10o’clock?—yes,Ican.【解析2】whileconj.“在……期间；当……的时候”while引导的时间状语从句的谓语动词只能是延续动词。_while__thechildrenhavefun,parentscantakedancelessonsonthebeach.【解析3】helpsb.withsth.在某事上帮助某人。【注】helpv帮助→helpfuladj.有帮助的helpsb.dosth.=helpsb.withsth.帮助某人做某事withthehelpofsb.=withone’shelp在某人的帮助之下withoutthehelpof没有在…的帮助之下①Ithinkreadingisvery__helpful____.②__without____yourhelp,wecouldn’tcatchthethief.20.couldIinvitemyfriendstoaparty?我能邀请我的朋友们来聚会吗？【解析】invitesb.toSp.邀请某人去某地【解析】invitev→invitationn邀请invitesb.todosth邀请某人做某事invitesb.to+地点邀请某人去某地21.Idon’tunderstandwhysomeparentsmaketheirkidshelpwithhousew