1、,PART 1,语法导学,PART 2,达标检测,Period Four GrammarPresent perfect tense,PART1,语法导学,感悟规律 重点难点剖析,现在完成时的构成为： 。,感知以下课文原句，完成方框下的小题,语法感知,1.It has been six years since we last saw each other. 2.You know，I have seen quite a lot of China and I have visited some beautiful cities. 3.Yes，they have just completed it!
2、4.They have put up a lot of high-rise buildings recently. 5.Our earth has been polluted heavily so far.,查看答案,have/has过去分词,现在完成时表示到目前为止已经完成的动作或存在的状态，它强调的是结果，而不是动作。 现在完成时的构成为：have/has过去分词。 一、现在完成时的用法 1.表示过去发生或已经完成的某一动作对现在造成的影响或结果。可以表示最近完成的动作，也可以表示经历或经验。常与already，just，recently，so far，up to now，till now
3、，ever，never等连用。 I have already finished all the work. 我已经完成了所有的工作。,语法精析,Mr Smith has just left. 史密斯先生刚离开。 注意：现在完成时与一般过去时的用法区别： (1)现在完成时强调的是过去的动作对现在造成的影响或结果。连用的时间状语与现在的时间有关，不与表示过去的时间状语连用。 (2)一般过去时表示过去发生的动作或存在的状态，与现在的情况没有关系。与表示过去的时间状语连用，如yesterday，last year，in the past，ago等。 I lived in London for two
4、years. 我在伦敦住过两年。(现在不在伦敦) I have lived in London for two years. 我在伦敦已住了两年了。(现在还在伦敦),2.表示过去已经开始、持续到现在(可能还会继续进行下去)的动作或状态，常和表示一段时间的状语连用，如：for，since，these days，this year，now等。 We have been good friends since we were very young.我们从小就是好朋友。 Mary went to Japan last year.And I have not heard from her ever sin
5、ce.玛丽去年去了日本，从那以后我就再也没有收到过她的来信了。 注意：表示短暂意义的动词(动作不能持续)如arrive，begin，borrow，buy，come，die，join，leave等，其现在完成时的肯定式不能和表示一段时间的状语连用，需要时要用相应的表示延续状态的动词替换。,3.在时间、条件等状语从句中，代替将来完成时。 Once you have promised，you should keep it. 你一旦许下诺言，就务必遵守。 As long as you have cleaned all the windows，you are allowed to play. 只要你把所
6、有的窗户擦完，你就可以玩了。,二、几种常见句型 1.It is/has been一段时间since. It is/has been two weeks since we arrived here. 自从我们到这里已经有两个星期了。 It is/has been quite some time since I was last in London.我不在伦敦已经很长时间了。 2.This/It is the first/second/.time (that).这是某人第一/二/次做某事。 This is the first time I have been here. 这是我第一次到这里来。 I
7、t was the fifth time you had visited the Summer Palace.那是你第五次参观颐和园了。,单句语法填空 1.Since 2011，the country (grow) more corn than rice.(2018全国) 2.While regularly eating out seems to (become) common for many young people in recent years，its not without a cost.(2018浙江) 3.Chinas high-speed railways (grow) fro
8、m 9,000 to 25,000 kilometers in the past few years.(2018北京) 4.I (read) half of the English novel，and Ill try to finish it at the weekend.(2016北京),高考链接,has grown,have become,have grown,查看答案,have read,5.Despite the previous rounds of talks，no agreement (reach) so far by the two sides.(2015天津) 6.How mu
9、ch do you know about the Youth Olympic Games to be held in Nanjing? Well，the media (cover) it in a variety of forms.(2014江苏) 7.When I first met Bryan I didnt like him，but I (change) my mind.(2013新课标全国),has been reached,have covered,have changed,查看答案,PART2,达标检测,当堂检测 基础达标演练,1.Mr Yang is not at home.He
10、 (go) to Shanghai on business. 2.A lecture on the computer (give) three times by Mr Zhang already. 3.This is the most interesting party that I (enjoy). 4.Cathy (not，phone) her mother since she went to Berlin. 5.It is the first time that he (leave) his country. 6.My parents (promise) to come to see m
11、e before I leave for Africa.,单句语法填空,has gone,has been given,have enjoyed,hasnt phoned,查看答案,has left,have promised,7.I was out of town at that time，so I dont know exactly how it (happen). 8.Oh no！Were too late.The train (leave). Thats OK.Well catch the next train to London. 9.You shouldnt leave schoo
12、l before you (finish) your homework. 10.I havent heard from Henry for a long time. What do you suppose (happen) to him?,happened,has left,have finished,查看答案,has happened,11.You dont need to describe her.I (meet) her several times. 12.So far this year we (see) a fall in house prices by between 5 and 10 percent. 13.By the time you (finish) your homework，it will be too late to go there. 14.In the past five years，I (travel) to Jiangsu twice. 15.He (come) in 2001.He (be) a teacher for over 18 years.,have met,have finished,have travelled,came,has been,have seen,查看答案,