重大版选修6 Unit 2 Troublesome Travelers grammar（共30张PPT）

课件30张PPT。Present Perfect Continuous TenseobjectiveTo use Present Perfect Continuous Tense correctly语法讲解建议采用归纳法，如尽可能多的呈现一些相关例句，或可让学生从已学课文中找相应例句，引导学生试着从所观察到的语言现象中总结出语言规则和语法规律。Have A L kSentences from this unit:The coqui frog population has been increasing in Hawaii since 1988, but just recently exploded. She has been working at the factory since she left school. We have been living in this flat since 1990. It has been raining for 3 days.to test your sense of observation to test your ability of short-term memory to test your ability to highlight the language pointsGuessing Game The coqui frog population _____(increase) in Hawaii since 1988, but just recently exploded. She _____(work) at the factory since she left school. We _____(live) in this flat since 1990. It _____(rain) for 3 days.Fill in the blanks.has been increasinghas been workinghave been livinghas been rainingPractise1. Although he has lived with us for years, he _____ us much impression. A. hadn’t left B. didn’t leave C. doesn’t leave D. hasn’t left 2. How can you possibly miss the news? It _____ on TV all day long. A. has been B. had been C. was D. will be 3. _____ Tom and Vicky _____ married? A. How long were, being B. How long, have C. How long have, been D. How long did, get4. — I’m sure Andrew will win the first prize in the final. — I think so. He ____ for it for months. A. is preparing B. was preparing C. had been preparing D. has been preparing以上我们已经通过归纳总结和练习对本课的语法内容有了一定的了解，下面就让我们根据 之前练习的考察情 况进一步选择讲解 该语法项的重难点。 现在完成进行时: 基本用法 1) 强调动作的持续性。 The telephone has been ringing for almost a minute. Why hasn’t anyone answered it? 电话响了差不多一分钟, 为什么没人接?Present Perfect Continuous Tense 2) 表重复。叙述从过去某时到现在或最近一直重复的动作。 The weather has been changeable lately; I’ve been having a lot of colds. 最近天气变化无常, 我时常感冒。 3) 有感彩。 Too much has been happening today. 今天真是一个多事之日。现在完成进行时和现在完成时的比较: A. 未完结性 I’ve cleaned the windows. 我把窗户擦干净了。 I’ve been cleaning the windows. 我擦窗户来着。(可能窗户尚未擦完) B. 短暂性 现在完成时与现在完成进行时都可以表示延续至今的状态, 但完成进行时常表示短暂性。 A. They have lived in New York. B. They have been living in New York. 句A具有长期性, 而句B具有短暂性。 C. 刚完结性 与现在完成时相比, 现在完成进行时有时可以表示刚刚完结的动作。有时它是现在事件的直接原因, 或者是得出结论的证据。 My hands are dirty. I’ve been painting the car. 我的手很脏, 我在油汽车来着。 Your eyes are red and puffy. Have you been crying? 你的眼睛又红又肿, 你是不是哭来着？ D. 连续性或重复性 现在完成进行时常常用于表示延续至今的连续性或重复性动作。 She has been playing tennis since she was eight. All these days he has been writing articles to our magazine. 结论: 现在完成进行时主要用于表示 A. 过去开始而且现在仍在进行的动作; B. 过去开始, 现在刚刚停止的动作; ... ...