《情态动词-基本用法课件 高考英语一轮复习.pptx》由会员分享，可在线阅读，更多相关《情态动词-基本用法课件 高考英语一轮复习.pptx（16页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、情态动词情态动词情态动词属于助动词，表示说话人的情态动词属于助动词，表示说话人的情绪情绪、态度态度、语气语气。五大属性五大属性I can play basketball.I can play basketball.She can play baskestball.Can you play basketball?Yes,I can./No,I cant.1.不能单独作谓语不能单独作谓语 2.接动词原形接动词原形3.无人称和数的变化无人称和数的变化4.本身有含义本身有含义5.否定在后否定在后情态动词分类情态动词分类cancould能能（能力）（能力）也许也许可能可能必须必须不得不不得不需要需要敢于
2、敢于have toneeddaremustmaymightbe able toshouldought to应该应该can1.能力I can swim。我会游泳。2.可能性We can finish the project within this week.我们能在本周内完成这个项目。3.征求许可Can I hand in my homework tomorrow?我可以明天交作业吗？4.请求Can you help me?你能帮我吗？5.cant没有能力Sorry,sir,we cant fix your car.抱歉先生，我们修不了您的车。不可能That woman cant be Mias
3、s Wang.Miss Wang is in Shanghai today.那个女人不可能是王小姐，王小姐今天在伤害。不允许Sir,you cant smoke here.先生，您不能在这里吸烟。could1.能力（过去时）He closed his shop so he could move to Shanghai with his family.他关掉了他的商店，这样他就能和家人搬去上海了。2.可能性（一般指将来）I think there could be a fire in that tall building.我认为在那栋高楼里可能会发生火灾。3.征求许可Could I borrow
4、 your car?我能借你的汽车吗？4.请求Could you say it again?你能再说一次吗？5.建议We could try the new machine.我们可以试试新机器。be able to表示能力时，be able to 和can 可以互换be able to有人称、时态和数的变化Some people are able to/can master a foreign language in a very short of time.有些人可以短期内掌握一门外语。I am unable to/cant understand what she wants.我理解不了她想
5、要什么。may1.征求许可May I have a glass of water?我能要一杯水吗？2.可能性（一般指将来）Mr.Wang may be right in the case.在这个案例上，王先生可能是正确的。might可能性（可指现在和将来）They might be having lunch now.他们现在可能在吃午饭。They might go out for a walk in the afternoon.他们下午可能去散步。2.肯定He must be Mr.Wang,our new Chinese teacher.他肯定是我们的新语文老师王老师。must1.必须We
6、must leave now.Its getting late.我们必须离开了，天太晚了。3.mustnt（禁止）You mustnt smoke in the classroom.禁止在教室吸烟。have tohave to 和must 都可表示“必须，不得不”1.have to 强调客观需要，表示客观环境使其不得不做某事We have to show our passes to enter the building.我们必须出示通行证才能进入大楼。2.must 强调主观性，表示说话人主观上认为必须做某事We must clean the house today.我们今天必须打扫房子。sho
7、uld 和 ought to都可表示“应当，应该”You should take along your medicine.你应该带着药。We ought to run faster.我们应该跑得更快一些。need 和和dare的双重用法的双重用法need+doto do情态实义need not dodont/doesnt/didnt need to dodare not dodont/doesnt/didnt dare to dodare+doto do情态实义判断dare/need 的用法1.If you dare say that to our teacher,I would vote for you.()2.She doesnt dare to swim in the river.()3.You neednt go if you dont want to go.()4.He needs to finish it in the evening.()情态实义情态实义