2015-2016学年人教版选修6unit1grammar.pptVIP

高二英语Book6 Unit1;Step one Leading-in 虚拟语气用来表示说话人的主观愿望或假想，它所表示的是一个条件，且不一定是事实，也可能与事实相反，主要运用与条件句中。虚拟语气的应用较为灵活，因此在学习时应注意语境、时态、特殊结构等。主要从以下几个方面着手： 1. 对现在、过去、将来等情况虚拟的表达法。 2. “错综时间条件句”的特殊语境。 3. 没有明确的状语从句的含蓄条件句。 4. 虚拟语气在各种从句中的具体用法。;Step two Presentation 语气 语气和时态、语态一样，是动词的一种形式，表明说话者的目的和意图。英语中有四种语气：陈述语气、疑问语气、祈使语气和虚拟语气。 1. 陈述语气 陈述一个事实或提出一种想法的语气。 The weather is looking up. 天气渐渐转好。 Our city has experienced great changes. I don’t know anything about the accident. 2. 疑问语气 用来提出问题或询问情况的语气。 Do you have a camera? How long have you been living here? Which do you prefer, tea or coffee? You are from Italy, aren’t you? ;;Step three Discovering structure 虚拟语气在条件句中的用法 条件句分为真实条件句和虚拟条件句。真实条件句所表示的假设是有可能实现的，而虚拟条件句所表示的假设是不可能或不大可能发生的。 真实条件句 这种条件句实现的可能性非常大，常用if, unless, once, as / so long as, on condition that等引导。 If I have time, I’ll come over to see you. If we leave now, we can still catch the train. I won’t go to party unless they invite me. As long as you love it, you can keep it to yourself. 2. 虚拟条件句 虚拟条件句往往指不能实现的或纯属假想的情况，可以对现在、过去或将来进行假想，分别用不同的动词形式表示，主句谓语动词也相应采用不同形式。;(1) 对现在情况的虚拟 If I were you, I would choose to work in a small town. 如果我是你，我会选择在小城镇工作。 If the weather were fine now, we would have a picnic. 如果现在天气好，我们就去野餐。 If I had a map now, we could easily get out of the forest. 如果我现在有张地图，我们就能很容易走出森林了。 If you tried again, you might succeed. 如果你再试一次，或许就会成功。 总结：对现在情况的虚拟，条件句中用_______________ _________________, 主句用________________________。 ;(2) 对过去情况的虚拟 If you had come yesterday, you would have met Georgia. 如果你昨天来，你就会见到Georgia. If it had not been for your help yesterday, I couldn’t have caught the train. 如果昨天你没有帮我，我就赶不上火车。 If you had worked hard, you would have passed the exam. 如果当时你努力了，你就能通过考试了。 总结：对过去情况的虚拟，条件句中用_______，主句用_____________________________________;(3) 对将来情况的虚拟 If were to do the job, I would do it in a different way. 如果我来做这项工作，我会用另一种方法。 If you should come tomorrow,