(共25张PPT)
完成时态
标志词
①表示过去发生并"已完成"的某个动作对现在造成的影响或产生的结果,强调的是这个影响或结果,常与yet, already, just, before, recently, lately, ever等时间状语连用。
I have just turned off the light.我刚刚把灯关上了。
I have already read the book.我已经读过这本书了。
标志词
②表示开始于过去、持续到现在并可能持续下去的动作或状态,常与these days, up to now, so far,"for+时间段"和"since+时间点"等连用。
It has rained a lot these days.这些天多雨。
She has worked in the school for ten years.她已经在这所学校工作10年了。
The factory has been here since the 1990s.这家工厂自20世纪90年代以来一直在这里。
drill
Alibaba’s Freshippo, where customers can shop via Alipay (支付宝)on their smart phones, ( ) (come) under the spotlight these days.
tip
非延续性动词(短语)leave, arrive, come, go, return, join, die, buy, borrow, get married等,在现在完成时的肯定句中不能与表示一段时间的状语连用,要进行相应的转换才能与表示一段时间的状语连用,比如:
leave→be away,arrive→be here,come→be here,go→be there,return→be back,join→be in,die→be dead,buy→have,borrow→keep,get married→be married
The old man died 4 years ago.=The old man has been dead for 4 years.这个老人去世4年了。
tip
但在否定句中,一些非延续性动词可与表示一段时间的状语连用,表示过程或结果。
I haven’t bought anything for a year.我一年没买任何东西。
Sentence patterns
①在"This/It is the first (second, third…)time+ (that)从句"句型中,从句要用现在完成时。
②在"This/It is the+形容词最高级+名词+(that)从句"句型中,从句要用现在完成时。
③在"It+is/has been+一段时间+since+从句"句型中,主句常用现在完成时或一般现在时,从句用一般过去时。
过去完成时
The news came as no surprise to me. I ( ) (know)for some time that the factory was going to shut down.
By then he ( ) learnt English for three years.
When I woke up, it ( ) already stopped raining.
In Beijing, more than 21,100 people ( ) (apply) to donate their bodies by the end of 2017, since the city started to promote a body donation campaign in 1999.
tip
want, hope, mean, plan, intend等动词用于过去完成时时,可用来表示"本来打算做某事而实际上没有做"。
We had intended to come and see you.我们本打算来看你。
句型
①主语+had hardly/scarcely(no sooner)+过去分词+when(than)从句。从句用一般过去时;hardly,scarcely,no sooner位于句首时,主句要倒装。
He had hardly begun to speak when the audience interrupted him.
Hardly 提前,怎样倒装?
Hardly had he begun to speak when the audience interrupted him.
句型
It was+一段时间+since从句。since从句用过去完成时。
It was at least three months since I had left Beijing.
句型
③It was the first/second/…time+(that)从句。从句用过去完成时。
It was the first time that I had chatted online in English.
Drills:
Despite the previous rounds of talks, no agreement______ so far by the two sides.
A. has been reached B. was reached
C. will reach D. will have reached
【答案】A
Oh,my God! The ceiling _________ in and the kitchen is e quickly,Jack!
A.fell B.had fallen C.has fallen D.was falling
【答案】C
7._______ by many potential customers, the salesman had to gather his courage and sell the product in different ways.
A. Having denied B. Denying
C. Being denied D. Having been denied
【答案】D
8.A large number of excellent films ______ all over the world over the past decades.
A.have produced B.have been produced
C.were produced D.produced
【答案】B
---When shall we start the reconstruction of the historic building
--- Not until our program ______ by the authority.
A. will approve B. will be approved
C. has approved D. has been approved
【答案】D
We first met in1998, and from then on we ____ good friends .
A are B . will be C . have been D . had been
【答案】C
It is the first time he ____ here and now it is high time that he _____ around.
A. comes; should be showed B has come ;is showed
C has come ; should be showed D came ;showed
【答案】C
--Why do you look very upset
---The electricity was cut off suddenly and my essay _____ unfinished since.
A. was left B. has left
C. had been left D. has been left
【答案】D
Ten astronauts ______ into space since China’s first astronaut Yang Liwei succeeded in his space trip in 2003.
A have been sent B have sent C had sent D had been sent
【答案】A
The rate of racial progress varies in different areas of the country, but in the past ten years ________ more improvement.
A. there is B. it is C. there have been D. there has been
【答案】:D
——When did he go to America
——Oh, he________ there since last summer.
A. was B. has been C. went D. has gone
【答案】:b
This was the second time that I________Mount Tai as a college student.
A.climb B.had climbed
C.climbed D.have climbed
【答案】B
--You seem to be familiar with this city.
——I _____ here for three years. It’s great to be back for a visit.
A. lived B. have lived C. had lived D. live
【答案】A
【解析】根据最后一句话可知现在不住在这个城市了,所以要过去时。