必修三unit2 语法和写作.ppt

Writing,写作专题突破,Unit1,语法专题突破,Section,语法专题突破,情态动词七、need1need表示“需要”、“必需”。通常用在否定句或疑问句中，且只有现在时。Heneedntpayforit.这东西他不必付钱。Needyougonow?你需要现在走吗？Yes，Imust.是的，我必须走。(No，Ineednt.),2neednthavedone表示没有必要做而做了。Itwassonear.Weneednthavetakenataxi.这么近呀，我们本没必要坐出租车的。3若用作实义动词时，其变化与一般动词相同。Youneedtobecareful.你得小心些。Youdontneedtobesoworried.(Youneedntbesoworried.)你不必这么担心。,Doesntheneedtocomeagain？(Neednthecomeagain？)他不必再来了吗？八、dare1dare表示“敢”。通常用于否定句、疑问句和条件从句中。Shedarenotdoso.她不敢这么做。Darehetellthemwhatheknows?他敢告诉他们他知道的事吗？,Youwillbepunishedifyoudarebreaktherules.如果你敢违反规定的话你将受到惩罚。2用作实义动词时，其变化形式与一般动词相同，肯定句中要跟带to的不定式，而在否定句和疑问句中不定式to可要可不要。Thisstudentdoesntdare(to)raiseanyquestioninclass.课上这个学生不敢提任何问题。Isupposehedarestotellthemanagerthetruth.我想他敢告诉经理真相。,Doyoudare(to)driveacaronsuchacrowdedroad?你敢在这么拥挤的街道上开车吗？注意：dare作情态动词和实义动词的过去式都是dared。Hedarednottellusthetruth.他不敢告诉我们真相。Hedaredtochallengeallkindsofdifficulties.他敢于挑战各种困难。,九、“情态动词havedone”的用法,.完成句子1(2010年高考湖南卷改编)You_(没有必要买)agift，butyoucanifyouwantto.答案：donthavetobuy2(2010年高考陕西卷改编)MayItakethisbookoutofthereadingroom?No，you_(不可以)Youreadithere.答案：mustnt,3(2010年高考天津卷改编)Mark_(本来没必要那么慌的)Afterdrivingattopspeed，hearrivedhalfanhourearly.答案：neednthavehurried4(2011年高考课标全国卷改编)They_(本应该到达的)atlunchtimebuttheirflightwasdelayed.答案：shouldhavearrived,5(2011年高考江苏卷改编)Ileftmyhandbagonthetrain，butluckilysomeonegaveittoarailwayofficial.Howunbelievabletogetitback!Imean，someone_(原本可能把它偷走的)it.答案：mighthavestolen6Itoldyourfriendhowtogettothehotel，butperhapsI_(本应该用车把她带到这里)答案：shouldhavedrivenherthere,7Thebosshasgiveneveryoneaspecialholiday，sowe_(没必要)gotoworktomorrow.答案：neednt8IlltellMaryabouthernewjobtomorrow.You_(你本应该上周就告诉她的)herlastweek.答案：shouldhavetold9Beingafraidofmakingmistakes，thelittleboy_(不敢回答)answerhisteachersquestion.答案：doesntdare,10He_(一定是解决了)allhisproblems；otherwise，hewouldntbesorelaxed.答案：musthavesolved11Therewasalotoffunatlastnightsparty.You_(本应该来的)，butwhydidntyou?答案：shouldhavecome12Sir，you_(不应该坐)inthiswaitingroom.Itisforwomenandchildrenonly.答案：oughtnttobesitting,13Oh，Imnotfeelingwellinthestomach.I_(本不应该吃这么多)friedchickenjustnow.答案：shouldnthaveeatensomuch14Tomisneverlateforwork.Whyisheabsenttoday?Something_(一定出事了)tohim.答案：musthavehappened,15(2011年郑州高一检测改编)IhaventseenMr.Whiteforweeks.What_(可能发生了)him?答案：canhavehappenedto.用适当的情态动词填空1Ihavenotaraincoatwithme.ThatswhyI_waituntiltherainstops.2Thelastbushasleft.We_walkhome.,3Theweatherwasbad.We_waitfortwohoursattheairportbeforewetookoff.4Mustwefinishthecompositioninclass?No，you_.5You_readthatbookifyoudontwantto.6_IwaterthetreesonTuesday?No，youneednt.7HeissostrongthatI_fightagainsthim.,8We_(receive)theletteryesterday，butitdidntarrive.9Whenwegottothecinema，thefilmhasntstartedyet，sowe_(hurry)10WhenIgottothecinema，thefilmhadalreadystarted；I_(get)thereearlier.,答案：1.haveto2.haveto/willhaveto3.hadto4neednt/donthaveto5.neednt6.Must7darenot8.oughttohavereceived9.neednthavehurried10.oughttohavegot/shouldhavegot,Alice，onceafamoushostess，sufferedfromobesityoneyearago.Sheistoofattocontinueherwork.Tobecomeslimandearnherliving，shedecidedtoloseweight.Atfirst，shetookslimmingpills.Theshopassistantsaidthatthepillswouldhelpherloseweightbeforelong.Hesaidmanystrengthsofthepillsanddiscounteditby20%.Whenaskedwhatitsweaknesswas，hesaidtherewasnone.,Butunfortunately，Alicecontinuedtoputonweight.Shebroughtasuitagaisttheshopandwouldnthavethemgettingawaywithtellingcustomerslies.Thensheconsultedthehealthexpertabouthowtoloseweight.Theexperttoldherthatsheoughttolimitherdiet，haveahealthyandbalanceddiet，cutdownonfatandsugarandeatmorerawfruitandvegetables，suchascucumberandpeach.,艾丽斯曾经是一位著名的女主持人，一年以前她得了肥胖症。她太胖了，以至于不能继续工作了。为了使自己变得苗条，也为了谋生，她决定减肥。一开始，她吃减肥药。店员说这些药能帮助她不久以后减轻体重。他说了这种药的很多优点，而且还给她打了8折。当问及这种药的缺点时，他说没有。但不幸的是，艾丽斯继续增重。她起诉了药店，绝不允许他们向顾客撒谎而逃脱惩罚。,然后，她就如何减肥咨询了一位健康专家。这位专家告诉她应该限制自己的饮食，吃健康而平衡