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1、Section Grammar 现在完成时 语 境 自 主 领 悟先观察原句后自主感悟1.Its beensix years since we last saw each other, you know.2.And this is the first time I ve visited your hometown.3.You know, Ive seenquite a lot of China and Ive visitedsome beautiful cities, but this is one of the most attractive places Ive beento.4.They
2、ve put up a lot of high-risebuildings recently.5.Up to now, Ive understoodeverything the teachers said.1.由例句可知，现在完成时的构成： has/have过去分词2.由例句可知，现在完成时可与since 引导时间状语从句连用。3.由例句可知，现在完成时可与时间状语 recently, up to now等连用。4.由例句可知， have/has been to表示“曾经去过”； have/has gone to 表示“已经去了某地，去而未归”。 语 法 精 要 点 拨一、现在完成时的用法1表
3、示过去发生的动作对现在造成的影响或结果。 常与 recently, before, lately, just, already, yet, so far, up to now, till now, in the past/last years, these days等时间状语连用。The Browns have visiteda lot of places in China so far迄.今为止， 布朗一家已经参观了中国的许多地方。He has been therethree times in the last few years近.几年他去过那里三次了。2表示动作或状态过去已经开始，持续到
4、现在 (可能还会继续进行下去 )。常与表示一段时间的时间状语连用如：for 一段时间，since过去时间点，since then, ever since, up to now, so far等。Mr. Wang has worked in this factory since he came to this city.自从来到这个城市，王先生一直在这家工厂工作。Prices have fallen sharply over the past six months. 在过去的六个月里，价格急剧下降。第 1页3在 、条件状 从句中可用 在完成 表将来。Dont get off the bus un
5、til it has stopped.直到公交 停下才能下 。As long as you have cleanedall the windows, you are allowed to play.只要你把所有的窗 擦完，你就可以玩了。 名 点津 在肯定句中 ，非延 性 如come, go, leave, borrow, buy, die, join等的完成 不能与 段 用 ，若要接 段状 ， 成相 的延 性 或状 。但在否定句中 ，非延 性 的完成 可与 段 用。I have boughta new car for two weeks.( ) I have had a new car for
6、 two weeks.()我 了 新 已 两周了。即 演 1The famous writer has written(write) a new book in the past two years.【 学号 ：33882037】Up to now many businesses started up by college students have taken(take) off thanks to the comfortable climate for business creation.Much useful information about these planets has bee
7、n collected(collect) since2019.二、 在完成 的常用句型1It is/has been一段 since一般 去 ，表示“自从以来多久了”It is/has been3 years since I published my first book.自从我出版第一本 以来已 三年了。It is/has beenthree years since he smoked.他戒烟已有三年了。2This/It is the first/second.time (that) 在完成 ，表示“ 是某人第一/二次做某事”It is the first time that Tom has
8、 visitedChina.第 2页这是汤姆第一次访问中国。3在“ This is the形容词最高级名词that 从句”结构中，that 从句要用现在完成时态。This is the best film that I have ever seen.这是我看过的最好的电影。 名师点津 现在完成时与一般过去时的区别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， 落脚点是现在，不与表示过去某一具体的时间状语连用， 如 yesterday, last时间名词 ， 时间名词 ago 等。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 yeste
9、rday, last year, in the past, ago等。He has livedin Beijing for four years.他在北京住了四年了。 (可能刚搬走 ， 也可能继续住下去 )He lived in Beijing for four years.他在北京住过四年。 (现在已经不在那里住了 )即时演练 2 It has been a long time since I heard(hear) from him last time. It is the second time that he has joined(join) in the discussion abo
10、ut how to deal with the problem.【导学号 ：33882038】 This is the most interesting party that I have enjoyed(enjoy) 随 堂 效 果 落 实.单句语法填空1 In the last few years, China has made(make) great achievements in environmental protection.2The reports went missing in 2019 and nobody has seen(see)them since.第 3页3Ann i
11、s in hospital.Oh, really？ I didnt know(not know) I will go and visit her.4My parents have promised(promise) to come to see me before I leave forAfrica.5Her grandfather has been dead(dead)for over five years.单句改错1This is the first time I come to Shanghai. come前加 have2I have known her since we are chi
12、ldren. arewere3It had been six years since I came here. hadhas4This is one of the most attractive places that I travelled to.travelled前加 have5Whatever the result is, we should accept it with a smile, because we had tried our best. hadhave6Up to now Jack helped some children from poor countries all over the world. helped 前加 has7When their children lived far away from them, these old people have felt cut off from the world. 去掉 have8Although I have gone to Nanjing twice, I still want to go there a third time. gonebeen【导学号 ：33882039】第 4页