Modalverbs一.Weusemodalverbstotalkabout:二.Wealsousemodalverbsto:1.Ability(能力):can/could:can/could:can/could:can/could:Attention:Attention:I’msotired!Ihavetodothetrainingforatleast10hoursaday!Attention:ShiDongpengmightwinamedalattheOlympicGames.Attention:must表示肯定的猜测，译为“一定”，不能用于否定句或疑问句。Thismustbeyourpen.Hemustbedoinghishomeworknow.Hemusthavearrivedalready.mustAttention:may/might:may/might:5.Makingrequests(提出要求):shall:shall:7.Makingoffers(提供帮助):will/would:will/would:will/would:2).门就是打不开!will/would:8.Givingadvice(提出意见):should:should:3.should表示意外或惊讶常译为“居然，竟然”。Ican’tbelievesuchagentlemanshouldbesorudetotheold.我不敢相信这样一个绅士居然对老人如此无礼。4.should表示猜测时，一般指按经验或逻辑判断，翻译成“照说应该，估计，想必”三.“情态动词+havedone”的用法他现在一定在看小说.Hemustbereadingnovelsnow.他们买了一辆新车。他们一定很有钱.Theyhaveboughtanewcar.Theymusthavealotofmoney.他们在玩篮球，他们一定完成了作业。Theyareplayingbasketball,theymusthavefinishedtheirhomework.刚才我还看见他了，所以他不可能出国的.Isawhimjustnowsohecouldn’thavegoneabroad.你本来可以考的更好。Youcouldhavehadabettermark.他可能已经从报纸上知道这个消息了。Hemighthavereadthenewsfromthenewspaper.表猜测语气的反意疑问句的构成:句子中含有表示猜测的情态动词时，其反意疑问句的构成不能再用原句中的情态动词，而应根据原句在去掉情态动词的情况下的主谓关系来确定其反问形式。Let'shaveatry!PracticePractice四.可兼做行为动词的情态动词：need、dare五.表示否定的情态动词的用法:部分情态动词的否定式是情态动词中的考点之一。情态动词考题:3.Wedidn'tseeTomatthemeetingyesterday.Heit.A.mustn'thaveattendedB.cannothaveattendedC.needn'thaveattendedD.wouldhavenotattended4.Weplaychessthanbridge.Someofusdon'tknowhowtoplaybridge.A.hadbetterB.wouldbetterC.wouldratherD.hadrather5.Thereissomeoneknockingatthedoor.itbeTom?A.canB.mustC.shouldD.oughtto6.Twoyearago,myhusbandboughtmeabicycle.Ifyouliveintown,itisoftenfasterthanacarandyouworryaboutparking.A.mustnotB.maynotC.shouldnotD.don'thavetoThankyou!