学年高中英语Unit1TalesoftheunexplainedSectionⅣGrammar.docx

1、学年高中英语Unit1TalesoftheunexplainedSectionGrammarSection Grammar & Writing语法图解探究发现I havent seen Justin since .Detective Sam Peterson, who has taken charge of the case, told journalists, Sometimes people make up such amazing stories .From our recent survey of students, we have foundthat 53 percent of th

2、e students often play sports.For centuries, people have reported seeing a wild creature in the Himalayas called Yeti.Large trackshavealsobeen discovered which some people say belong to the Wild Man.This incident has received great interest due to reports of strange lights in the sky and of alien vis

3、its around the time the boy disappeared.Ive been writingthe composition for two hours, but I havent finished it yet.Ihave been wanting to meet you for a long time.我的发现(1)句中均运用了现在完成时，其谓语动词的构成形式为：have/has过去分词。(2)句运用了现在完成进行时，其谓语动词的构成形式为：have/hasbeen现在分词，表示过去发生的动作一直持续到现在。(3)现在完成时有两个基本用法：一是表示过去发生的动作对现在的影

4、响或结果，如句；二是表示过去开始的动作一直持续到现在，并且有可能继续下去，如句。一、现在完成时1现在完成时的构成have/has过去分词2现在完成时的用法(1)表示过去发生的动作产生的结果或对现在造成的影响。动作虽然发生在过去，但落脚点在现在。Iveforgottenhis telephone number.我忘记了他的电话号码。(没法联系他了)Ihavent finished reading this book yet, so I cant return it to the library.这本书我还没有看完，所以不能把它还给图书馆。即时演练1用所给动词的适当形式填空The price ha

5、s_gone (go) down, but Im not sure whether it will remain so.All the windows have_been_painted (paint), and they look new.I have_read (read) many reports about the UFO recently.(浙江高考改编)Alvin, are you coming with us?Id love to, but something unexpected has_come (come) up.(2)表示动作或状态从过去某时开始一直延续到现在，并可能延续

6、下去。常与so far, by now, up to now, since, for a long time, up till now, in the past/last few years 等表示一段时间的状语连用。He has worked here fortwenty years by now.到现在为止，他已经在这儿工作20年了。Up to now, we have receivedno letters from her.到现在为止，我们没有收到她一封信。名师点津(1)该用法中的动词多是延续性动词，不能是非延续性动词或趋向动词。(2)非延续性动词用于否定句可以表示否定的状态，故可以用来

7、表示状态的持续。(3)由since 引导的时间状语中， since 后面的时间名词必须是“时间点”，而不能是“时间段”；而for 短语中的时间名词必须是“时间段”(有时for 可省去)。Ive known him since 1980.我从1980年就认识他了。He hasnt writtento me for two years.他已经两年没给我写信了。I have learnt English (for) many years.我学英语已很多年了。即时演练2(1)单句改错The price of petrol had risen sharply since last month.hadha

8、sThe astronomer researched the UFOs for many years.researched前加hasI heard nothing from him up to now.heard前加haveI have bought the car for 3 years.boughthad/kept(2)单句语法填空(2015北京高考改编)In the last few years, China has_made (make) great achievements in environmental protection.(陕西高考改编)His first novel has

9、_received (receive) good reviews since it came out last month.(湖南高考改编)I remember you were a talented pianist at college. Can you play the piano for me?Sorry, I havent_played (not play) the piano for years.3现在完成时的常用句型(1)It/This is the first/second/.time that 主语谓语部分(常用现在完成时)(2)It has been 一段时间 since .

10、(3)It/This/That is the最高级名词定语从句(定语从句常用现在完成时)It is the first time that Ive heard of the story about Crop Circles.这是我第一次听说麦田怪圈的故事。Ithas been two years since we saw each other. 自上次一别，我们有两年没见了。This is the best film (that) Ive ever seen.这是我所看过的最好的一部电影。即时演练3翻译句子/完成句子这是我第一次来上海。This/It_is_the_first_time_tha

11、t_Ive_come_to_Shanghai.这是我见过的最漂亮的画。This_is_the_most_beautiful_picture_Ive_seen.这是自从我来到这所学校以来所参加的最有教育意义的讲座。(湖南高考改编)It is the most instructive lecture that_I_have_attended since I came to this school.4在时间或条件状语从句中，现在完成时可以代替将来完成时If you have done the experiment, you will realize the theory better.如果你做过这个

12、实验，你会更好地理解这个理论的。即时演练4用所给动词的适当形式填空If you have_finished (finish) the book, please return it to me.Dont get off the bus until it has_stopped (stop)I shall post the letter as soon as I have_written (write) it.(天津高考改编)We wont start the work until all the preparations have_been_made (make)5现在完成时和一般过去时的区别时

13、态区别例句现在完成时重在强调过去的动作或状态对现在的影响，重点在现在。Ihave lost my new book. 我把新书弄丢了。(现在还未找到)一般过去时重在强调某个过去的动作或状态，与现在并无联系。I lost my new book yesterday. 我昨天把新书弄丢了。(昨天丢的，现在找到与否没有说明)即时演练5用所给动词的适当形式填空cleanWe cleaned the classroom just now.We have already cleaned the classroom.workI worked in the factory for 3 years, now I

14、 run a restaurant.I have_worked in the factory for 3 years.(重庆高考改编)Kevin, you look worried. Anything wrong?Well, I took (take) a test and Im waiting for the result.二、现在完成进行时1现在完成进行时的构成have/hasbeen现在分词2现在完成进行时的用法(1)表示动作从过去某一时刻开始一直持续到现在并有可能延续下去，更强调动作的延续性，常与for, since 等引出的时间状语连用。Ihave been teachingEngl

15、ish for almost twenty years.我教英语已经将近20年了。They have been living here for 10 years.他们住在这里10年了。Ihave been waitingfor you about half an hour.我等你大概半个小时了。(2)表示动作的反复性。They have been discussingthe matter several times this year.他们今年已经数次讨论那件事了。(3)表示某种感情色彩。Ihave been waiting to see you for a long time. 长久以来，我一直等着见你。名师点津表示状态的动词不能用于现在完成进行时。我认识他已经好几年了。I have known him for years. ()I have been knowing him for years. (