Unit 8 现在完成时态 人教版英语八年级下册.pptx

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1、Present Perfect Tense-By Simbahave/has（助动词）+done（过去分词）Teaching Goals：Knowledge：学生掌握现在完成时态的定义、结构、时间标志词及与一般过去时态的区别.Skill:学生能够运用现在完成时态表达已经发生的事情.Teaching key/difficult points：重点掌握现在完成时态的时间标志词already/yet;ever/never;“since+一般过去时”和“for+段时间”Havebeento/havegoneto/havebeenin 的区别 延续性动词和非延续性动词的用法辨析Type of lesso

2、n：NewclassAbout the ClassI havent seen Bob these days.(这几天我一直没见到Bob。)Ive known Bob for 20 years.(我已经认识海绵宝宝2o 年了。)Ive been at this store for over 10 years.(我已经在这家店干了10 多年了。)I have lived here since 1999.(自从1999 年来我就住在这儿了。)现在完成时态用法1：某些动词的现在完成时可表示过去某一时间开始并一直持续到现在（包括现在在内）的动作或状态。可以和表示延续的时间状语连用。表示持续动作或状态的动

3、词多是延续性动词。如此处的seen;known;beenat;livedI havent seen her these days.Ive known Bob for 20 years.Ive been at this store for over 10 years.I have lived here since 1999.Have you had your lunch yet?(你已经吃过午饭了吗？)Yes,I have.Ive just had it.(是的，我已经吃过了。我刚吃了)Have you read Little Women yet?(你看过Little Women 这本书吗？)N

4、o，I havent.(不，我没看过。)现在完成时态用法2：表示过去发生或已经完成的动作对现在造成的影响和结果I havent read the book Little Women yet.I have just had lunch.过去的动作：hadlunch 对现在造成的影响：现在我不饿了过去的动作：readthebook 对现在造成的影响：我对该书并不了解No,I havent.I have never seen UFO UFO.(不，我从没见过UFO。)回忆过去经历Have you ever seen UFO?(你见过UFO 吗。)回忆过去经历现在完成时态用法3：表示动作已经发生，现在

5、回忆过去经历。I have ever seen ET.过去的动作：seen 现在回忆是否有看见过：没见过/看见过1-某些动词的现在完成时可表示过去某一时间开始并一直持续到现在（包括现在在内）的动作或状态。可以和表示延续的时间状语连用。表示持续动作或状态的动词多是延续性动词。如此处的seen;known;beenat;lived2-表示过去发生或已经完成的动作对现在造成的影响和结果3-表示动作已经发生，现在回忆过去经历。I have already taught him some dance.Bob has not opened the gift box yet.现在完成时态时间标志词:对现在的

6、影响：already/yet/justalready:已经;可用于肯定句句中、句尾。Have you had your lunch yet?yet:常用于否定句句末 表示“还”、疑问句句末“已经”。Mom has just cleaned the house.yet:常用于肯定句句中 表示“刚才”Ive known Bob for 20 years.I have lived here since 1999.现在完成时态时间标志词：过去持续到现在：for/sinceE.G:I have taught you English since 3 months ago.Since+时间点“自从.”；Si

7、nce+时间段+ago“自从.以前”；Since+句子for+段时间现在完成时态时间标志词：回忆过去：ever/neverHave you ever read the book called Little Women?I have never read the book named Little Women.ever：曾经；常用于问句中never：从来没有/从不；常用于否定句中already:已经;可用于肯定句句中、句尾。yet:常用于否定句句末 表示“还”、疑问句句末“已经”。Since 后可加表示过去时间的短语或句子 for+段时间ever：曾经；常用于问句中never：从来没有/从不；常

8、用于否定句中拓展：sofar(到目前为止)；before(之前)；inthepast+段时间；recently（最近）。just:刚才;可用于肯定句句中。1.They _ all their money,so they have to walk home.A.spend B.had spent C.have spent2.Tom _ his homework yet,so he wont go out with his classmates.A.finishes B.has finished C.hasnt finished 影响CC yet 现完 否疑练习3.-Will you go sho

9、pping with me now?-Sorry,I cant.I _ my shirts.A.wash B.have washedC.washed D.am washing4.-_ you _ the film Harry Potter 5?-Not yet.I will see it this Sunday.A.Did;see B.Are;seeingC.Have;seen D.Do;seeDC5.I wont forget my teacher because she _ so kind to me since I came to this school.A.has been B.wil

10、l beC.was D.isA重难点突破1：去过/去了/在情景2:BobhasgonetoChongqing.Bob 已经去重庆了。情景3:BobhasbeeninChongqingfor2years.Bob 已经在重庆待了2 年了。（Bob已经不在重庆）（Bob现在不在这里,在重庆或在去重庆的路上）（Bob在重庆）情景1:BobhasbeentoChongqing.Bob 去过重庆。have/has been to+地点：已经去过某地 have/has gone to+地点：已经去某地了或在去某地的路上have/has been in+地点：已经在某地待了多久了“三去”总结have gone

11、 to（去而未归）have been to（去而已归）have been in（已待一段时间）常与never/ever/次数连用常与for/since 连用1.Mr.Brown _ _ _ Shanghai for 3 days.2.Mary _ _ _ _ the Great Wall.(never)3.Where is Tom?He _ _ _ the book shop.4.They _ _ _ that village several times.5.Mike and his parents _ _ _ the north for half a year.have been in ha

12、ve been to have gone tohas been inhas never been tohas gone tohave been tohave been inhave been in 常与for 连用have been in 常与for 连用去而未归与次数连用 have been to练习重难点突破2：现在完成时和一般过去时辨析Ihave seen thefilm.Isawthefilmlastweek.我看过这部电影。（现在我了解这部电影的内容）我上星期去看了这部电影。（只说明上星期看电影这一行为，不涉及现在的情况）Gr.oneGr.twoHehas lived heresin

13、ce1992.Helivedherein1992.1992 年以来他一直住在这里。（他现在还住在这里）1992 年他住在这里。（不涉及他现在是否还住在这里）重难点突破2：现在完成时和一般过去时辨析现在完成时：表示过去发生的某一动作对现在造成的影响和结果。强调的是现在的情况，所以它不能和表示过去的时间状语连用。例如：yesterday,lastnight,threeweeksago 等。一般过去时：只表示过去的动作或状态，和现在不发生联系。它可以和例如：yesterday,lastnight,threeweeksago 等时间状语连用。重难点突破3：现在完成时中的瞬间动词与延续性动词瞬间动词：也

14、叫瞬时动词，或者非延续性动词。这类动词代表的动作十分短暂，一经发生就已结束。如：come,go,start,become,receive,die,marry 等延续性动词：动作的发生会持续一段时间或者该动作表示一定的状态。stay，work,learn,live 等重难点突破3：现在完成时中的瞬间动词与延续性动词用法区别1：延续性动词可以和“for+段时间”或“since+过去某一时间点”表示“动作持续了多长时间”瞬间动词的否定结构表示某动作不发生的状态是可以延续的。Ive known Bob for 20 years.I have not bought anything for 2 mont

15、hs.bought-买，瞬间动词；加上not 后，句子可以与“for+段时间”连用True(T)orFalse(F)()Hehas left for ten minutes.()Hehasbeenawayfortenminutes.()Hehasleft.Practice:翻译下列句子。1-1月份以来我没收到过信。（getletters）2-我们几年没见过面了。（meeteachother）重难点突破3：现在完成时中的瞬间动词与延续性动词关于瞬间动词和延续性动词的两个常用句型句型1：It is+时间段+since+过去时间点（瞬时动词的过去式），表示“状态持续一段时间”他离开这座城市7 年了。

16、他结婚三个月了。Itissevenyearssinceheleft thecity.It is threemonthssince hegot married.句型2：延续性动词+till+过去某一时点（瞬间动词过去式）=did not+瞬间动词+until/till+瞬间动词过去式Theyslepttillnoon.Theydidnt get up untilnoon.Hewaitedtillhismothercameback.Hedidnt leave untilhismothercameback.重难点突破3：现在完成时中的瞬间动词与延续性动词瞬间动词转化为延续性动词的基本规律leave be away borrow keep buy have begin/startbeondie be dead finishbeoverfall ill be ill getupbeupbecome be comebackbebackfall asleep be asleep catchacoldhaveacoldleave be away from getto/arrive/reachbe(in)get to know know put on wear get married-,be married join be in 机构 be a member of