北师大版高中英语必修二第3讲：Unit4 Cyberspace-语法篇（教师版）.docxVIP

Unit 4 Cyberspace语法篇____________________________________________________________________________________________________________________________________________________________________1、掌握will和be going to的用法区别。2、掌握虚拟语气的基本用法。will和be going to用法区别：will的用法（will是情态动词，后接动词原形。常表示依据直觉、知识、经验等做出的揣测）①will表将来存在的状态、将要发生的动作或将来的经常性、习惯性动作，常与时间状语next week, tomorrow等连用。例：They will be doctors 5 years later. 五年后，他们将成为医生。Each time he comes to the city on business, he will visit his English teacher. 每次来这个城市出差，他都会拜访他的英语老师。I will go to Britain next week. 下星期我要去英国。②事物固有的属性、特征或发展的必然趋势。例：It will become warm when spring comes. 当春天来临时，天气将变暖。Fish will die without water. 鱼儿离开水会死。③说话时临时做出的决定。—I hear Jim was injured in a car accident. He is in hospital now. 听说吉姆在一场交通事故中受伤了，现在在医院。—Then I will go to see him. 那我这就去看他。④表示请求和邀请，常用于第二人称。Will you come in and have a drink? 你愿意进来喝一杯吗？⑤说话者对未来作出语言和揣测。You will be all right after taking this medicine. 吃过这药你就会好了。⑥可以表意愿、意图、自愿或坚持做某事。He’ll take you home. You only have to ask. 他愿意送你回家，你只要跟他说一声就行。be going to的用法（打算，将要…）①事先经过考虑或准备，打算最近或将来要做的事。What are you going to be when you grow up? 等你长大，你想要成为什么？②根据现在的迹象，预计要发生的事。The old man is so weak, he is going to die. 老人如此虚弱，他活不长了。will与be going to表将来时的区别①be going to可用于表将来时的条件状语从句中，而will不行。错误：If you will play basketball, you have to finish your homework first. 正确：If you are going to play basket, you have to finish your homework first. ②will可以用在带有条件状语从句的主句中表将来，而be going to不行。错误：If it is fine, we are going to go camping.正确：If it is fine, we will go camping.③be going to表示近期、眼下就要发生的事情，will表示的将来时间则更远一些。He is going to writhe a letter tonight. 他打算今晚写封信。He will write a book one day. 他打算将来写本书。④will临时决定要做的事，be going to事先考虑要做的事。—Why are you taking it out? 干嘛要把它拿出来？—I’m going to wash it. 我想把它洗一洗。—Where is the telephone book? 电话簿在哪里？—I’ll get it for you. 我去给你拿。虚拟语气if条件句中的虚拟语气①与现在事实相反的虚拟语气：条件句谓语用“过去时（be动词一般用were）”，主句谓语用“would/should/could/might+动词原形”。If I saw him now, I would be very happy. 如果我现在见到他，我会很高兴的。②与过去事实相反的虚拟语气：条件句谓语用“过去完成时”，主句谓语用“woul