新概念英语第二册课件Lesson28现在完成时上课课件(共19张PPT)

1、Cacad bccba bb1. First listen and then answer the question.What is Jasper Whites problem?People often park their cars outside his gate so that he cant get his car into his garage.Are there many people who believe in ancient myths?Why cant he get his own car into his garage?How many ways has he come

2、up with to solve this problem? What are they?ReadingAre there many peopoe who believe in ancient myths?No, there arent.2. Why cant he get his own car into his garage?Because someone has parked a car outside his gate when he comes home in the evening.3. How many ways has he come up with to solve this

3、 problem? What are they?Two.The first is to put up “No Parking” signs outside his gate.The second is to put an ugly stone head over the gate.现在完成时 (Present Perfect) 现在完成时用来表示之前已发生或完成的动作或状态，其结果的确和现在有联系。动作或状态发生在过去但它的影响现在还存在；也可表示持续到现在的动作或状态。其构成： have (has) +过去分词比较过去时与现在完成时 1）过去时表示过去某时发生的动作或单纯叙述过去的事情，强调

4、动作； 现在完成时为过去发生的，强调过去的事情对现在的影响，强调的是影响。 I saw this film yesterday.（强调看的动作发生过了。）I have seen this film. （强调对现在的影响，电影的内容已经知道了。）构成形式： 助动词 have / has+ 过去分词肯定式：主语+have / has+ 过去分词+其他 I have read the book twice.否定式：主语+havent / hasnt+ 过去分词+其他 I havent been there before. 疑问式：Have / Has+主语+ 过去分词+其他？ Have you fi

5、nished your homework?现在完成时的构成及基本句型 现在完成时的基本用法表示过去发生或已完成的某一个动作对现在造成的影响或结果。 - Have you had lunch? - Yes, I have. Ive just had it. 你吃过午饭没？有，吃过了，我刚刚吃的。（影响及结果：我现在饱了，不需要了） He has gone to Beijing. 他已经去北京了。（影响及结果：他人现在不在这里了）(2) 表示过去已经开始，持续到现在的动 作或状态。该用法常和表示过去某一 时刻延续到现在的一段时间的状语连 用，如for 、since等引导的一段时间。 I have

6、been here for three days. 我在这里已经3天了。 His father has worked in that factory since 1991. 他爸爸自1991年以来都在这家工厂工作。 1. -He _to the party. -What _to him? He said he would be here by eight oclock. A. hasnt come ;happened B. didnt come; has happened C. isnt coming; had occurred D. hasnt come; has happened 解析:

7、从上下文看，说话人还在等待他的到来因此第一空用现在完成时，第二空是对他迄今情况的推测，也要用现在完成时。 D考点例析2. I _ a letter from him since he left. A. didnt receive B. havent got C. didnt have D. havent heard解析：据since可知，应排除A、C，hear from sb.=receive/get/have a letter from sb.意为“收到某人的来信”，故选B。 BHas bought Has had Has parked Has not been Has putHave not hadHas putHave seenHas turnedHas closed the doorHave gone to bedHas stopped rainingHas had a bathThe picture has fallen down