搜索
SectionⅢGrammar—need的用法语法图解探究发现①Ididn'tneedtogetavisa.②ItwasaninformalpartysoIdidn'tneedtowearasuit.③Youneedn'thavespokensoslowly.④Youneedn'thavewateredtheflowers,forit'sgoingtorain.⑤Youneedn'tworryaboutsituationsliketheseifyouhavegoodsocialskills.⑥—NeedIdothehomeworkfirst?—Yes,youmust./No,youneedn't/don'thaveto.⑦IneedtoknowwhatIcantalkaboutwiththeChinesepeoplethatImeet.⑧Youdon'tneedtotakeagift.⑨DoIneedtoleavemytelephonenumberandaddress?⑩Thedoorneedsoiling.＝Thedoorneedstobeoiled.[我的发现](1)句中黑体部分表示“没有必要做某事，而实际上也没做”；句中黑体部分表示“本没有必要做某事，而实际上却做了”。(2)⑤⑥句中need为，而句中need则为实义动词。(3)由⑥句可知，在回答带有情态动词need的提问时，肯定回答用，否定回答用或。(4)由⑩句可知，当主语是表示“物”的名词时，用作实义动词的need后接动名词的主动形式表示被动含义。即needdoing相当于。①②③④情态动词⑦⑧⑨mustneedn'tdon'thavetoneedtobedone一、need的用法1．用作实义动词(1)有人称和数的变化，其第三人称单数形式为needs，变为否定句或疑问句时要用助动词do/does/did。(2)后跟名词、代词、不定式或动名词作宾语，当need的主语与need后面的动词之间是被动关系时，need后面接不定式的被动形式或动名词的主动形式。Youdon'tneedtoworryaboutme.你不必担心我。Theroomneedscleaning/tobecleaned,butIonlyhavetimeonSunday.房间需要打扫，但是我只有星期天有空。2．用作情态动词(1)need表示“需要”或“必须”，通常用于否定句和疑问句。Youneedn’tdoitagain.你不必再做了。Needhedohishomeworkfirst?他需要先做作业吗？(2)由must引起的一般疑问句中，否定答语可用needn’t,意为“没必要”。—MustIdotheworknow?—No,youneedn’t.——我现在必须做这项工作吗？——不，你不必。(3)在need引起的一般疑问句中，肯定回答用must，否定回答用needn’t。—NeedIgotheretoo?—Yes,youmust./No,youneedn’t.——我也需要去那儿吗？——是的，你必须去。/不，你不必去。即时演练1完成句子①Heisonlyametertall,sohe(不需要)aticket.②We(需要确保)thatourplanwillbewellcarriedout.③You(没必要浇花)becauseit'sgoingtorain.④Thereissomethingwrongwithmybike,soit(需要修理)．⑤—Mustwehandinourexercisetoday?—No,you(不必).Youcanhanditintomorrow.doesn'tneedneedtomakesureneedn't/don'tneedtowatertheflowersneedsrepairing/toberepairedneedn't二、didn'tneedtodo与needn'thavedone的区别1．didn'tneedtodo表示“过去没必要做某事，实际上也没做”。Youdidn'tneedtobuythebook;itwascomplextounderstand.你不必买那本书；它太复杂了，很难懂。Mary'sboyfrienddrovetopickherup,soshedidn'tneedtotakeataxi.玛丽的男朋友开车去接她，因此她没必要打出租车了。2．needn’thavedone表示“过去没必要做某事，而实际上做了”。Youneedn’thavewashedthoseclothes;wehaveawashingmachinetodothatsortofthing.你本不必洗那些衣服的，我们有台洗衣机可以洗衣服。Ineedn’thavecookedsomuchfood,butIdidn’tknownobodywashungry.我本没必要弄那么多吃的，但我当时不知道谁也不饿。[名师点津]didn’tneedtodosth.仅仅陈述过去的情形；needn’thavedonesth.含有惋惜、遗憾、后悔等含义。即时演练2完成句子①You(本不必这么匆忙).Thereisplentyoftime.②He(没必要早起),sohestayedinbeduntil10o’clock.③Myfriendsentmethebook,soI(没必要给他写信)toaskforit.④Idressedverywarmlyforthetrip,butI(本没必要这么做)becauseitwasveryhot.needn’thavehurrieddidn’tneedtogetupearlydidn’tneedtowritetohimneedn’thavedoneso[链接高考]完成句子1．(2019·天津高考改编)学会批判性地思考是当今孩子为了未来(的发展)将需要的一项重要技能。Learningtothinkcriticallyisanimportantskilltoday'schildren.2．(2019·江苏高考改编)医生把他的电话号码告诉给病人，以防他们需要医疗援助。Thedoctorshareshisphonenumberwiththepatientsmedicalassistance.willneedforhefutureincasetheyneed3．(2017·天津高考改编)我的房间里乱糟糟的，不过我今天晚上出门之前没必要打扫，我可以(明天)上午再打扫。Myroomisamess,butIitbeforeIgoouttonight.Icandoitinthemorning.4．(2016·北京高考改编)我喜欢周末，因为周六周日我不必早起。Ilovetheweekend,becauseIonSaturdaysandSundays.needn't/don'tneedtocleanneedn't/don'tneedtogetupearly5．(2015·天津高考改编)来新学校前我本没有必要担心的，因为这里的同学都对我很友好。IbeforeIcametothenewschool,formyclassmateshereareveryfriendlytome.6．(2014·重庆高考改编)我已经订了一些比萨饼，所以当我们到家疲惫时就不必担心做饭的事了。I'veorderedsomepizza,sowecookingwhenwegethometired.needn'thaveworriedneedn't/don'tneedtoworryabout[演练提能]Ⅰ.单句语法填空1．ItwasSunday,somyeightyearoldsondidn’tneed(go)toschool.2．Shehasbeenwaitingherefornearlyanhour.Sheneedn’t(arrive)soearly.3．Ididn’tneed(clean)thewindow,becausemysisterhadalreadycleanedit.4．Theclasseswerecanceledduetotheterribletyphoon,sothestudentsdidn’tneed(go)toschool.togohavearrivedtocleantogo5．Youneedn’t(write)suchalongarticle.Threehundredwordsareenough.6．Thankyouverymuchforcleaningthehouse,butyouneedn’t(do)it,becauseIcanmanageitbymyself.7．Youdon’tneed(tell)uswhatyou’rethinkingateachstep.8．Mark(need)tolearnChinesebecausehiscompanyisopeningabranchinBeijing.9．Tobeawinner,youneed(give)allyouhaveandtryyourbest.10．Thegrasshasgrownsotallthatitneeds(cut)．havewrittenhavedonetotellneedstogivecutting/tobecutⅡ.完成句子1．你本来没必要那么匆忙地赶到公司，因为会议已经取消了。Youtothecompanyinahurry,becausethemeetinghasbeencalledoff.2．父亲把文件寄来了，所以我不必为此给他写信了。Fathersentmethedocument,soItohimforit.3．不需要用闹钟来叫醒我，因为每天早晨六点钟，火车就从我家附近经过。Iaclocktowakemeupbecauseatsixo’clockeachmorningthetraincomesbymyhouse.needn’thavegonedon’tneedtowriteneedn’t/don’tneedtouse4．如果你不想告诉我，可以什么也不说。Youmeanythingifyoudon’twantto.5．我不必担心我的周末，我总是在周末来临前就计划好了。Imyweekend—Ialwayshavemyplansreadybeforeitcomes.needn’t/don’tneedtotellneedn’t/don’tneedtoworryabout