高一英语现在完成时解题技巧及经典题型及练习题(含答案)
一、单项选择现在完成时
1．—Hello, I have heard you are on holiday.
—That’s not the case. Actually I ______ from my holiday in Athens, where I ______ for a fortnight. A．returned; stayed B．have returned; stayed
C．will return; stay D．am to return; stay
【答案】B
【解析】
【详解】
考查时态。句意：—你好，我听说你在度假。—不是这样的，我已经从雅典度假回来了，我在那里待了两个星期。根据句意可知，我已经回来，所以用现在完成时have returned。根据语境，stay这个动作已经结束，表示过去发生的动作，所以第二空用一般过去时。故B选项正确。
2．By now 516 Confucius Institutes ______in 142 countries and regions, according to the Confucius Institute Headquarters.
A．founded B．would found
C．have been founded D．had been founded
【答案】C
【解析】
考查时态和语态。句意：根据孔子学院总部的统计，到现在为止，全世界142个国家和地区已经建立了516个孔子学院。主语516 Confucius Institutes和found之间是被动关系，该句应用被动语态。且by now做时间状语，谓语动词应用现在完成时态。综上，该空应填have been founded。C选项正确。
3．With the development of the intelligent robot technology, people _______ the importance of cooperating among robots, and the challenge in practice.
A．have been noticed B．are noticing
C．will notice D．have noticed
【答案】D
【解析】
【详解】
考查现在完成时态。句意：随着智能机器人技术的发展，人们已经注意到机器人之间合作的重要性，以及在实践中的挑战。结合句意可知句子用现在完成时态，people是句子主语，故答案为D。
4．The recent 40 years great changes taking place all over China.
A．witnessed B．has witnessed
C．had witnessed D．witnesses
【答案】B
【解析】
【详解】
考查时态。句意：近40年来，中国发生了巨大的变化。表示动作开始于过去某一时刻，一直延续到现在，或可能还要继续下去，用现在完成时，故选B。
5．They____for ten years.
A．has been married B．have been married
C．got married D．married
【答案】B
【解析】
【详解】
考查marry的用法。句意：他们结婚有十年的时间了。marry作不及物动词时有两种用法：get married to sb.（表动作）/be married to sb.（表状态）；作及物动词时有marry sb.，根据for ten years可知，此处应当用be married to sb.强调状态，用现在完成时。故B 选项正确。
6．I am a better reader this year than I was last year because I ________ to hundreds of new concepts and ideas.
A．have exposed B．had been exposed C．have been exposed D．was exposed
【答案】C
【解析】
【分析】
考查时态。
【详解】
句意：今年我比去年更擅长阅读，因为我接触了数百种新的概念和想法。由上文可知“阅读”的动作发生在去年，延续到今年，并对现在产生了影响，故应为现在完成时。Expose“暴露；揭发”为瞬间性动词，此处现在完成时需改为延续性动词表示“接触”的状态，故用be exposed。综上本题最终选C。
7．--- When will the bike-sharing schemes be introduced to the public?
--- Not until a better understanding of them.
A．will we have had B．have we had
C．we will have had D．we have had
【答案】D
【解析】
【详解】
考查not until 位于句首时，句子使用部分倒装句的用法。句意： ---什么时候共享单车计划才会向公众开放呀？---直到我们对他们有一个更好的了解的时候，就会开放了。not until
位于句首时主句部分倒装，而until引导的时间状语从句不用倒装。再联系本句时态，说的是以后的事，所以主句用将来时态，从句用现在时态，故选D。
8．Never _______ a greater, or more beautiful, or a calmer or nobler thing than you.
A．did I see B．have I seen
C．I saw D．I have seen
【答案】B
【解析】
【详解】
考查时态和倒装。句意：我从未见过比你更伟大、更美丽、更冷静、更高贵的东西。Never 位于句首时，要进行部分倒装，强调过去的动作对现在的影响要用现在完成时，故B项正确。
【点睛】
倒装是高中英语的常见考点，注意当含有否定意义的词，如never，hardly，seldom，little，few，not until及not only等位于句首时，其后需要用部分倒装。
9．She is a strong-willed woman and not once _______ in to any difficulty in her life.
A．she has given B．did she give C．she gave D．has she given
【答案】D
【解析】
试题分析:考查动词时态和倒装句。句意：她是个意志坚强的女人，一生中一次也没有向任何困难屈服过。And 连接的两个并列句中，否定副词 not once放在了第二个句子的句首，所以后面部分用部分倒装语序，此外第一句的时态是一般现在时，后句又出现了in her life，所以句子应该用现在完成时，表示到现在为止，故正确答案为D选项。
考点：考查动词时态和倒装句
10．We two thirds of the project so far and we’re sur e to complete it on time.
A．finish B．will finish
C．have finished D．finished
【答案】C
【解析】
【详解】
考查时态。句意：到目前为止，我们已经完成了三分之二的项目，我们一定会按时完成。根据句中时间状语so far可知用现在完成时。故选C。
【点睛】
本题考查现在完成时，现在完成时是“过去的动作或状态持续到现在并且已经完成”。判断现在完成时的标志词有already , ever , never , yet , just , before, still , lately ,since , for a long time ,up to now, until, so far, in the last few years/weeks/mouths , till now, recently等，考生在平时学习英语过程中要多注意积累。本题只要抓住句中时间状语so far（到目前为止）就可
以判断出用现在完成时。
11．The Greens moved back to the countryside in 2008 and ________ a happy and peaceful life there ever since.
A．are leading B．lead C．led D．have led
【答案】D
【解析】
【详解】
考查时态。句意：格林一家2008年搬回农村，从此过上了幸福安宁的生活。根据句中时间状语，ever since自从那时候起，可知，指从2008年一直持续到现在，故用现在完成时。故选D。
12．— What do you mean when saying every minute counts?
— A man who dares to waste one hour of time _________ the value of life.
A．hadn’t discovered B．hasn’t discovered
C．didn’t discover D．isn’t discovering
【答案】B
【解析】
【详解】
考查时态。句意：—当你说每分钟都很重要的时候，你什么意思？—敢于浪费一小时时间的人还没有意识到生活的价值。根据句意可知正是他们没有意识到生活的价值，才敢于浪费时间。表示过去发生的事情对现在的影响，要用现在完成时。故B项正确。
13．Jim ____________ the size of this board and has found that it ____________.
A．has measured; measures five metres in width
B．measured; is measured five metres wide
C．has measured; is measured five metres wide
D．measures; has a measure of five metres wide
【答案】A
【解析】
【详解】
考查时态和语态。句意：吉姆量过这块板的尺寸，发现它有五米宽。根据and has found that it ____________.可知用现在完成时，排除B和D，measure 当“测量”讲时，后面加数值，用主动语态，故选A。
14．I’m afraid I you with a great many questions. Thank you a lot, sir.
A．have bothered B．appreciated
C．have contacted D．impressed
【答案】A
【解析】
考查动词时态。A. have bothered麻烦；B. appreciated欣赏，感激；C. have contacted交
往，接触；D. impressed铭记。句意：恐怕我已经麻烦了你许多问题，非常感谢您。此处指已经问了许多问题，动作已经完成用现在完成时，故选A.
15．In order to find the missing child, villagers _________ all they can over the past five hours. A．did B．do
C．had done D．have done
【答案】D
【解析】
【分析】
考查时态。
【详解】
句意：为了找到那个失踪的孩子，在过去的5个小时中，村民们已经做了所有他们能做的。句中they can是定语从句，修饰先行词all，在从句中省略了can后面的do（因为主句谓语动词是实意动词do），根据句中时间状语over the past five hours可知用现在完成时。故选D。
【点睛】
现在完成时表示过去完成的动作对现在仍有影响。现在完成时的标志性时间状语有：already , ever , never , yet , just , before, still , lately ,since , for a long time ,up to now, until, so far, in the last few years/weeks/mouths , till now, recently等等。
16．Tom ____on the essay for two hours but he _____only a hundred words by now.
A．has been working;has written B．has been working;writes
C．worked ;written D．worded;writes
【答案】A
【解析】
【分析】
【详解】
考查时态。句意为：Tom一直忙着写论文两个小时了，但是到现在为止他只写了100多个词。由后半句可知Tom现在还在写文章，故第一个空用现在完成进行时，第二个空强调到现在为止已经写完100个词了，所以用现在完成时，故A正确。
【点睛】
此题的简体关键是根据时间状语判断句子的时态。第一空根据时间状语for two hours，可
知应该用能延续的动词的现在完成时态，再根据后半句到目前已经写了100个词了，由此可知现在仍在写，因此第一空应该用现在完成进行时。而第二空的时间状语为by now，因此用现在完成时即可，所以用has written。
17．She _______Mr White for two years.
A．married B．has been married to
C．married with D．has bee marrying
【答案】B
【解析】
【详解】
考查谓语动词的时态和语态。句意：她已经嫁给怀特先生两年了。和某人结婚或嫁给了某人，用be married to sb。for+时间段，要用完成时。故此空填has been married to，综上所述，故选B。
18．After he left college, he was employed in an international company and there ever since . A．worked B．had worked
C．has worked D．was working
【答案】C
【解析】
【详解】
考查时态。句意：他大学毕业以后，被一家跨国公司雇佣了，从那以后就一直在那里工作。句中时间状语ever since意为“从那以后”，表示从过去时间开始到现在，通常与现在完成时连用，故C项正确。
19．The disease is a huge blow for the farmers. Hundreds of them ______ their animals, livelihood and hopes destroyed and many others fear they _____ the same fate.
A．have seen; will suffer B．saw; suffered
C．had seen; was to suffer D．see; suffer
【答案】A
【解析】
【详解】
考查时态。句意：这种疾病对农民来说是一个巨大的打击。数以百计的人目睹了他们的动物、生计和希望被摧毁，还有许多人担心他们会遭受同样的命运。结合句意可知第一空用现在完成时态；第二空用一般将来时态。故选A。
20．All of her time _______ to carrying out a further study on the cause of Alzheimer’s disease since she left school.
A．has been devoted B．devoted
C．has devoted D．was devoted
【答案】A
【解析】
【详解】
考查时态。句意：自从她离开学校，她一直致力于对Alzheimer病因的进一步研究。此处since“自从---以来”，引导时间状语从句，从句用一般过去时态，主句用现在完成时态，且
be devoted to“致力于---”，故选A。
【点睛】
1.since自从---以来（可做介词和连词），和现在完成时态连用。
He has lived here since he came. 自从他来到这里，就一直在这里住着。
2.It is /has been+一段时间+since 主语+一般过去时态+其他。自从做某事有多长时间了。
在这个句型中如果从句的动作是终止性动词，则表示从动作开始到现在多长时间了；如果从句的动作是持续性动词，则表示从动作结束到现在多长时间了。It is three years since he joined (终止性动词)the army.他参军有三年了；It is five years since he lived（持续性动词）here.他离开这有五年了。
21．—Let’s go for a nice walk into the country this afternoon.
—I’d like to, but I ________ to go with Alice to buy some c lothes.
A．agreed B．will agree C．have agreed D．had agreed
【答案】C
【解析】
【详解】
考查现在完成时。句意：---今天下午我们去乡村散散步吧。---我很想去，但是我已经答应和爱丽丝一起去买衣服了。现在完成时表示过去动作对现在造成的影响。由“but ”可知，作者已经答应和爱丽丝一起去买衣服了，所以不能去乡村散步了。故可知选C项。
22．Not until______ a chance to discuss it thoroughly, ______set out to handle the problem we came across last week.
A．we have had, shall we B．have we had,we shall
C．do we have, we D．we shall have had, shall we
【答案】A
【解析】
【详解】
考查倒装。句意：直到我们有机会彻底讨论这件事，我们才着手处理上周遇到的问题。Not until位于句首，主句用部分倒装，从句不倒装，本句中从句强调过去的动作对现在造成的影响，用现在完成时，故A项正确。
23．I ________ Mr. Bert of the change of the meeting. You don’t have to phone him again. A．have informed B．will have informed
C．would inform D．had informed
【答案】A
【解析】考查动词时态。句意：我已告知Mr. Bert会议的改变。你没必要再给他打电话。根据语境可知，句子应用现在完成时态表示过去的动作对现在的影响，故答案为A。
24．Great changes ________ in our school since 2016. A lot of progress ________.
A．have taken the place; have been made B．had taken place; have been made C．were taken place; has made D．have taken place; has been made
【答案】D
【解析】
【详解】
考查时态。句意：自2016年以来，我们学校发生了巨大的变化。已经取得了许多进展。since+一段时间，是现在完成时的标志，因此应用现在完成时；take place意为“发生”，无被动语态，且主语是great changes，故谓语动词用复数，故用have taken place；progress
意为“进步，进展”，为不可数名词，故谓语动词应用单数，且progress与make之间是被动关系，故应用has been made。结合选项，故选D。
25．—Ouch! I_______ this really bad toothache for about three days.
—You really need to take a day off and see a dentist.
A．have B．am having C．have had D．had
【答案】C
【解析】
【详解】
考查动词时态。句意：——啊！我已经牙疼整整三天了。——你真的需要请一天假，去看牙医。现在完成时表示已经发生，持续到现在并且仍在进行的动作，根据时间状语for three days和“你真的需要请假去看牙医”可知，此处应使用现在完成时。故选C。
26．—Alice, you are supposed ______ part in the party in time.
—Sorry, but I had an unexpected visitor.
A．to take B．to have taken C．to be taking D．taking
【答案】B
【解析】
【详解】
考查固定用法。句意：--你本来应该及时参加这个聚会的。--对不起，我有不速之客来访。结合语境，此处指“你本来应该及时参加这个聚会的”，be supposed to do“应该做，理应做…”，由句意可知，“参加”这动作到现在已经完成了，强调“本来应该＂，应用现在完成时。故正确答案为B。
27．John and I＿＿＿friends for eight years.We first got to know each other at a Christmas party.But we＿＿＿＿＿ each other a couple of times before that.
A．had been； have met B．have been； have met
C．had been； had met D．have been； had met
【答案】D
【解析】
【详解】
考查动词时态。句意：我和约翰做朋友已经8年了，我们开始了解彼此是在一次圣诞晚会上，但在那之前我们见过两次面。第一空是表示过去到现在做8年时间的朋友，用现在完成时；第二空是指在圣诞节见面got to know each other用的过去时，在此以前见过，表示的是"过去的过去"用过去完成时；故选D。
28．Quite a few tall buildings _______in the last two years.
A．have been put up B．were put up C．had put up D．put up
【答案】A
【解析】
【详解】
考查现在完成时的被动语态。句意：过去两年里建了不少高楼。由“in the last two years”可知，本句为现在完成时，主语Quite a few tall buildings与谓语put up 为被动关系。故选A 项。
29．During the last three decades, the number of people participating in physical fitness programs sharply..
A．was increasing B．has increased
C．had increased D．will be increasing
【答案】B
【解析】
试题分析：考查动词的时态语态。从句意“在过去的三十年中，参加健身锻炼的人数已经增加很多了”知，increase的动作虽然发生在过去，但一直持续到现在，同时由题眼“during the last three decades”可知，该空中应该用现在完成时态，所以只有B项符合语境。
【名师点睛】时态题的考查关键是抓住句子的上下文含义和句中的时间状语。要根据时间状语来选择合适的时态，在平时的学习中要注意积累有关时态的用法和各种时态的特殊之处。这句话的时间状语是During the last three decades是典型的现在完成时的时间状语。
30．The number of the students who want to take the test on the mainland_________ steadily in recent years, with the average staying about 70,000 a year.
A．grew B．has grown C．have grown D．had grown
【答案】B
【解析】
【详解】
考查主谓一致和时态。句意：近年来，希望到内地参加考试的学生人数稳步增长，平均每年在7万人左右。A. grew一般过去时；B. has grown现在完成时（主语为单数意义）C. have grown现在完成时（主语为复数意义）；D. had grown过去完成时。分析句子可知，主语结构为the number of … 结构，意为“…的数量”，应看作为三单形式，且由 in recent years 时间状语可知时态为现在完成时。故选B项。
【点睛】
a number of…意思是“一些，若干”（= some），后接可数名词复数或代词，谓语动词用复数形式。a number of…词组中还可以加入形容词表示数量大或小等（例如：a large/small number of…许多/少数……）。
the number of…意思是“……的数字/数目”，介词of同其后名词构成介词短语，修饰the number.当它作主语时，谓语动词用单数。
本题考查在主谓一致方面，需要分清主语为the number of students，学生的数量。因此可知谓语动词应用单数形式。结合时态提示词in recent years，应用现在完成时。因此选择B 项。
31．The Mp3 ________ young people ________ a bit of decline recently with the appearance of the Mp4.
A．intending to; has entered into B．intended for; has gone into
C．meant to; takes on D．meant for; opens up
【答案】B
【解析】
【详解】
考查动词短语辨析和时态。句意：随着MP4的出现，为年轻人设计的这款MP3的销量已经下滑了。短语be intended for为…设计，be meant for本应为，be meant to do sth.打算做某事，enter into参与，go into进入（某种状态），take on呈现，open up开发，本句最后使用短语intended for…做定语修饰the MP3；副词recently意为“近来”，通常和现在完成时连用。结合句意，故B项正确。
32．Either the beautiful sights of this modern city or its local custom____ thousands of visitors during the past years.
A．have attracted B．were attracting C．has attracted D．was attracting
【答案】C
【解析】
【详解】
考查现在完成时与主谓一致。句意：无论是这座现代化城市的美丽景色还是当地的风俗习惯在过去的这些年都已经吸引了成千上万的游客。由“during the past years”可知，这句话使用现在完成时。“either…or…”作主语时，谓语动词形式与or后主语保持一致，its local custom是第三人称单数，所以谓语动词也应使用第三人称单数形式。故选C。
【点睛】
during the past+时间段， in the the past +时间段，in the recent +时间段都表示到现在为止的前一段时间，时态都用现在完成时。所以由本句话中的during the past years可知，这句话使用现在完成时。
33．— 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
【解析】
【详解】
考查时态语态。句意：——你为什么看起来很沮丧？——突然停电了，那时我的文章就没写完。句中leave与主语essay 构成动宾关系，要用被动形式；句中时间状语since表示从那时起到现在文章一直没写完，是现在完成时态的时间状语。故选D。
34．The musician along with his band members ________ ten performances in the last three months.
A．gives B．has given C．have given D．give
【答案】B
【解析】
【详解】
考查现在完成时与主谓一致。句意：在过去的三个月里，这名音乐家与他的乐队成员已经完成了十场演出。由“in the last three months”可知，这句话的时态为现在完成时，故排除AD选项。本句主语为the musician，为第三人称单数形式，句中的“along with his band members”是附加成分，故谓语动词要用第三人称单数形式。故选B。
35．That was not the first time he ____ us. I think it's high time we ____ strong actions against him.
A．betrayed, take B．had betrayed, took
C．has betrayed, took D．has betrayed, take
【答案】B
【解析】
【分析】
【详解】
考查时态和虚拟语气。句意：那不是他第一次背叛我们。我认为我们早该对他采取强硬措施了。That is/was the first time that+完成时，是固定句型；句中使用的是“That was…”，故应使用过去完成时。在固定搭配it’s (high/about) time…中，从句应使用过去时表示虚拟语气。故选B。
36．---Is this the first time you ______Beijing.
---No. But the first time I ______ here, the city wasn’t so beautiful.
A．visited; have come B．visited; came
C．have visited; have come D．have visited; came
【答案】D
【解析】
【详解】
考查现在完成时和一般过去时。句意：----.这是你第一次来北京吗?---不。但是我第一次来这里的时候，这座城市并不那么漂亮。It /This is the first time+that-结构中, that-从句用现在完成时。The first time是时间状语从句的从属连词，由“the city wasn’t so beautiful.”可知，从句为一般过去时。故D选项正确。
37．Linda ________ to her mother for so long that she figures out almost every gesture of her mother’s.
A．attended B．had attended C．would attend D．has attended
【答案】D
【解析】
【详解】
考查现在完成时。句意：琳达照顾她母亲太久了，她几乎能领会母亲的每一个动作。分析句意可知，本句为现在完成时，表示过去所发生的动作或事情对现在的影响或产生的结果，着眼点在现在。由“she figures out almost every gesture of her mother’s”可知，琳达照顾她母亲太久了。对现在的影响是，她几乎能领会母亲的每一个动作。故D选项正确。
38．How happy we are! The holiday we have been looking forward _______ at last.
A．to has come B．having come
C．to having come D．has come
【答案】A
【解析】
【详解】
考查句子结构分析和谓语动词。句意：我们是多么的快乐啊！我们一直所期望的假期终于来了。句中we have been looking forward to我们一直所期望的，作the holiday的定语，故整个句子应当为The holiday has come at last。故选A。
39．Commercial and recreational fishing _______ population sizes and also made individuals smaller, since big fish _______ and smaller ones thrown back.
A．decreased; kept B．had decreased; are kept
C．has decreased; keep D．has decreased; are kept
【答案】D
【解析】
【详解】
考查时态和语态。句意：商业和休闲捕鱼减少了种群规模，也使个体变小，因为大鱼被保留下来，小鱼被扔回大海。结合句意第一空是强调现在的结果，用现在完成时态；第二空是一般现在时态的被动语态，主语big fish与keep是被动关系，故答案为D。
40．Experiments _______ that children can be instructed in swimming at a very early age, as
early as about two months.
A．are proving B．will be proved C．are proved D．have proved
【答案】D
【解析】
【详解】
考查现在完成时态。句意：实验证明，儿童在很小的时候就可以学会游泳，最早两个月就可以了。此处表示“到现在为止已经得到的证明”，所以句子用现在完成时态，且主语是Experiments，名词复数，故选D。
英语过去完成时练习全集及解析 一、初中英语过去完成时 1．She said when she got to the cinema, the film ________ for 5 minutes. A. has begun B. had begun C. has been on D. had been on 【答案】 D 【解析】【分析】句意：她说当她到达电影院的时候，电影已经开始五分钟了。根据got 可知，电影开始五分钟属于在过去某时间前已经存在的状态，应该用过去完成时，所以排 除A和C。开始begin，电影已经开始了五分钟是存在的状态，要用延续性的动词，所以要 将瞬间动词begin改为be on，故选D。 【点评】此题考查动词的时态问题以及瞬间动词和延续性动词的区别。 2．Simon ________ the piano for ages when he gave his first concert. A. has played B. is playing C. had played D. will play 【答案】 C 【解析】【分析】句意：西蒙举行第一次音乐会时，他已经弹了很多年钢琴了。根据时间 状语when he gave his first concert.可知此处用过去的时态，表示先弹钢琴弹了很多年，然 后开了音乐会，表示过去的过去，应该用过去完成时：had+动词的过去分词，故答案为C。 【点评】考查过去完成时。掌握过去完成时的意义（过去的过去）和构成：had+动词的过去分词。 3．By the time I finished my homework，my mother ． A. slept B. has been asleep C. was asleep D. had been asleep 【答案】 D 可知此处应为过去完成时，故选 D. 和“ finished” 【解析】【分析】由上文“By the time ” 【点评】考查过去完成时。 4．By the end of 2012, many buildings built in our city. A. have been B. have C. had been D. will 【答案】 C 【解析】【分析】句意：到2012年底，我们的城市里已经建成了很多大楼。Buildings是build这一动作的承受者，该用被动语态。而被动语态是由“be + 及物动词的过去分词”构成。根据By the end of 2012可知该用过去完成时，所以选C。
中考英语现在完成时经典例题 一、初中英语现在完成时 1．All the students _______ very hard over the last three years. A. works B. has worked C. have worked D. worked 【答案】 C 【解析】【分析】Over the last three years, 用于现在完成时，又由于主语是复数，故选C。【点评】现在完成时的时间状语要掌握。 2．I am surprised at the new look of my hometown，for it _____ a lot over the years． A. changed B. changes C. will change D. has changed 【答案】 D 【解析】【分析】我对我的家乡的新面貌感到惊讶，因为这几年改变了很多， 结合over the years可知表达的动作发生在过去，对现在造成一定的影响，故用现在完成时have/has+过去分词，主语it，故has，故答案是D． 3．I scared of dogs ever since a dog hurt me when I was five years old. A. will be B. was C. have been D. would be 【答案】 C 【解析】【分析】由since引导的从句可知主句应用现在完成时，故答案为C。句意是：自从我五岁时被狗伤过之后我就一直怕狗。 【点评】本题考查现在完成时的用法。 4．—Lucy, is your uncle a teacher? —Yes, he is. He history for nearly 20 years. A. teaches B. has taught C. is teaching D. will teach 【答案】B 【解析】【分析】句意：——露西，你叔叔是老师吗？——是的，他是。他教历史将近20年了。根据句中的时间状语 for nearly 20 years ，可知，表示持续一段时间的动作，用现在完成时，have/has+过去分词。主语是he，用has，故选B. 【点评】考查现在完成时，注意其常与for+一段时间连用。 5．—How long can I _________ this book?
目录 1现在完成时的构成 (2) 2现在完成时的用法 (5) 3 使用现在完成时需注意事项 (7) 4过去完成时与现在完成时的比较 (12) 练习题 (13) 答案 (16)
现在完成时对于我们来讲是所有时态中最难掌握的一种。因为它并不是表示发生于某一时间的事情，而是既涉及过去，又联系现在的一种时态。请参见下列三个例句： 例：1.I live in Beijing. 我住在北京。 2.I lived in Beijing. 我住过北京。（我在北京住过。） 3.I have lived in Beijing. 我一直住在北京。 例1.的live是一般现在式，表示“我现在住在北京”这一事实。 例2.的lived是过去式。这句只是表示在过去的某一时期我在北京住过，至于现在住不住在北京则不清楚。 例3.的have lived是现在完成时，表示我在过去的某一时间开始住在北京，现在也住在北京。表示从过去到现在的一种继续状态。 1现在完成时的构成 现在完成时的形式是“have （has）+过去分词”，表示继续、完了、结果和经验等四种意思。 现在完成时的否定句是在have（has）的后面加上not，疑问句是将have（has）置于主语之前。 1现在完成时的肯定句 句型：
We have lived in Beijing. 我们一直住在北京。 He has lived in Beijing. 他一直住在北京。 过去分词的三种用法 过去分词有下列三种用法（过去分词的构成详见第六章）：1.构成现在（过去）完成时 have（has）+过去分词～ I have written the letter. 我写完这封信了。 2.被动语态：参见第十三章 be + 过去分词～ He was looked after.他受到照顾。 3.用于形容词 This is a broken chair. 这是一张坏的椅子。 2现在完成时的否定句 句型：主语+have（has）+not +过去分词～. I have not seen the movie yet.
高一英语现在完成时解题技巧讲解及练习题(含答案) 一、单项选择现在完成时 1．Ever since he left school, he ______ becoming a professor in that famous university. A．has never dreamed of B．had never dreamed of C．didn’t dream of D．was not dreaming of 【答案】A 【解析】 【详解】 考查时态。句意：自从他离开学校以来，他从来没有梦想成为那所著名大学的教授。此处since“自从---以来”，引导时间状语从句，从句用一般过去时态，主句用现在完成时态，故选A。 【点睛】 1.Since自从---以来（可做介词和连词），和现在完成时态连用。 He has lived here since he came. 自从他来到这里，就一直在这里住着。 2.It is /has been+一段时间+since 主语+一般过去时态+其他。自从做某事有多长时间了。 在这个句型中如果从句的动作是终止性动词，则表示从动作开始到现在多长时间了；如果从句的动作是持续性动词，则表示从动作结束到现在多长时间了。It is three years since he joined (终止性动词)the army.他参军有三年了；It is five years since he lived（持续性动词）here.他离开这有五年了。 2．Although she is only 16 years old, she ______ to drugs for two years. A．addicts B．had been addicted C．has addicted D．has been addicted 【答案】D 【解析】 【详解】 考查现在完成时态和固定搭配。句意：虽然她只有16岁，但她已经沉迷于毒品两年了。结合句意可知，这里是指到现在为止已经两年了，与现在有关系，用现在完成时态；be addicted to沉迷于---，故选D。 3．The recent 40 years great changes taking place all over China. A．witnessed B．has witnessed C．had witnessed D．witnesses 【答案】B 【解析】 【详解】 考查时态。句意：近40年来，中国发生了巨大的变化。表示动作开始于过去某一时刻，一直延续到现在，或可能还要继续下去，用现在完成时，故选B。
（英语）英语过去完成时练习全集 一、初中英语过去完成时 1．—We all went to the park except you last weekend. Why didn't you come? —Because I the park twice. A. have gone to B. had gone to C. had been to D. have been to 【答案】 C 【解析】【分析】have gone to去了（尚未回）．have been to去过（已回），根据句意在last weekend之前去过，所以用过去完成时，故选C。 【点评】本题考查过去完成时的用法，表示在过去某一时间前已经发生的动作。 2．We are too tired. Please stop __________ a rest. A. to have B. having C. have D. has 【答案】 A 【解析】【分析】句意：我们是在太累了，停下来休息一下吧。stop to have a rest.固定搭配故选A 【点评】注意时态一致， 3．By the time I finished my homework，my mother ． A. slept B. has been asleep C. was asleep D. had been asleep 【答案】 D 【解析】【分析】由上文“By the time ”和“ finished”可知此处应为过去完成时，故选D. 【点评】考查过去完成时。 4．By the end of 2012, many buildings built in our city. A. have been B. have C. had been D. will 【答案】 C 【解析】【分析】句意：到2012年底，我们的城市里已经建成了很多大楼。Buildings是build这一动作的承受者，该用被动语态。而被动语态是由“be + 及物动词的过去分词”构成。根据By the end of 2012可知该用过去完成时，所以选C。
现在完成时 （1）构成：现在完成时由助动词have + 过去分词构成，助动词have 有人称和数的变化。第三人称单数用has，其余用have. 现在完成时的否定式直接在助动词后面加上not、疑问式是把助动词提到主语之前。以study 为例，其否定式、 1）现在完成时通常表示在说话之前已经完成的动作或存在的状态。说话人强调的是该动作或状态对现在的结果或影响。 My daughter has just gone out. 我女儿刚出去。I’m sure we’ve met before. 我肯定我们以前见过面。 She has arrived. 她到了。 2）表示持续到现在的动作或状态，往往和包括现在在内的表示一段时间的状语连用，如recently, already, just, lately, for…, since…,yet等。如： I haven’t heard from her these days. 这些日子我没有收到她的信。 We haven’t seen you recently. 最近我们没有见到你。 They have been away for two years. 他们离开已经两年了。She has been with us since Monday. ★注意： 1）since和for的区别 since后接时间点，如1993，last term, yesterday, the time I got there for后接一段时间，表示“长达多久”，如ten years, a while, two days等。 Exercise: 用since和for填空 1. Jim has been in Ireland ______ Monday. 2. Jill has been in Ireland ______ three days. 3. His aunt has lived in Australia ______15 days. 4. Mary is in her office. She has been there ______ 7 o'clock. 5. India has been an independent country ______1974. 6. The bus is late. They've been waiting ______ 20 minutes. 7. Nobody lives in those houses. They have been empty ______ many years. 8. Mike has been ill ______a long time. He has been in hospital ______ October. 2）表示短暂意义的动词如arrive, leave, borrow, buy, begin, start, die等，在完成时当中不能和表示一段时间的状语连用，因为它们表示的动作不可能持续。因此，不能说： He has come here for 2 weeks. × The old man has died for 4 months. × They have left only for 5 minutes. × 以上三句话可以改为： He has been here for 2 weeks. The old man has ______ _______ for 4 months. They have _____ _____ only for 5 minutes. 3）have (has) been 和have (has) gone的区别：表示“曾到过某地”要用“have (has) been”; 表示“已经去某地”要用“have (has) gone”。试比较： Where has he been? 他刚才到哪里去了？（已经回来了） Where has he gone? 他上哪儿去了？（人不在） They have been to Canada. 他们到过加拿大。（现在已经不在加拿大） They have gone to Canada. 他们到加拿大去了。（可能在路上和已经到加拿大）. 4）现在完成时不能和表示过去的时间状语连用，如yesterday, last year, in 1976, two days ago, just now, when I came in，但可以和already, yet, sometimes, always, often, before, lately, recently, once, twice, ever, never等连用。例如：She has already come. 她已经来了。 I haven’t read it yet. 我还没读过这个。I have met him before. 我从前曾见过他。 Ma Hong has always been a good student. 马红一直是个好学生。I have often seen him in the street. 我经常在街上看见他。
英语过去完成时的用法总结 它表示句子中描述的动作发生在“过去的过去”。 基本结构 主语+had+过去分词vpp、(done) ①肯定句：主语+had+过去分词、 ②否定句：主语+had+not+过去分词、 ③一般疑问句：Had+主语+过去分词? 肯定回答：Yes,主语+had、 否定回答：No,主语+had not 、 ④特殊疑问句：特殊疑问词或词组+一般疑问句（Had+主语+过去分词）？ 基本用法表示在过去某一时刻或动作以前完成了的动作，也可以说过去的时间关于过去的动作。即“过去的过去”。可以用by, before等介词短语或一个时间状语从句来表示，也可以用一个表示过去的动作来表示，还可能通过上下文来表示。 例如： By nine o’clock last night, we had got200 pictures from the spaceship、到昨晚9点钟，我们已经收到200 张飞船发来的图片。 过去完成时-语法判定 1、由时间状语来判定
一般说来，各种时态都有特定的时间状语。与过去完成时连用的时间状语有： （1 ） by + 过去的时间点。如： I had finished reading the novel by nine oclock last night、 （2 ） by the end of + 过去的时间点。如： We had learned over two thousand English words by the end of last term、 （3 ） before + 过去的时间点。如： They had planted six hundred trees before last Wednesday、 2、由“过去的过去”来判定。 过去完成时表示“过去的过去”，是指过去某一动作之前已经发生或完成的动作，即动作有先后关系，动作在前的用过去完成时，在后的用一般过去时。这种用法常出现在： （1 ）宾语从句中 当宾语从句的主句为一般过去时，且从句的动作先于主句的动作时，从句要用过去完成时。在told, said, knew, heard, thought等动词后的宾语从句。如： She said that she had seen the film before、 （2 ）状语从句中
现在完成时 一、其构成 "助动词have (has) +动词过去分词"构成现在完成时。如： 1. Kate's never seen Chinese films，____ ? A. hasn't she B. has she C. isn't she D. is she 析：陈述句部分含否定词never,简略问句部分要用肯定式，又因Kate's是Kate has的缩写，故选B。 2. His uncle has already posted the photos to him. (改为否定句) His uncle ______ posted the photos to him ______. 析：already常用在肯定句中，yet常用在否定句、疑问句中，故填hasn't, yet。 3. -Ann has gone to Shanghai. -So ______her parents. A. has B. had C. did D. have 析："so+助/系/情态动词+主语"结构中的动词形式应与前句结构中动词形式保持一致，又后句的主语为her parents是复数,故选D。 二、其用法与标志词 (一)当句中有never, ever, just, already, yet, before等时，常用现在完成时。如： 1. -Mum, may I go out and play basketball? -___________ your homework yet? A. Do; finish B. Are; finishing C. Did; finish D. Have; finished 2. -______ you ______anywhere before? -Yes, but I can't remember where I______ A. Did; surf; surfed B. Have; surfed; surfed C. Did; surf; have surfed D. Have; surfed; have surfed 析：据yet和before可知,应用现在完成时，故1题选D，2题选D。 (二)当句中有"for +段时间"或"since +点时间"等时，主句常用现在完成时，谓语动词必须是延续性动词，若是非延续性动词，要改为延续性动词或表状态的词(短语)。如： 1. His brother has been to Stone Forest twice______he came to Yunnan. A. after B. before C. since D. for 析：主句用的是现在完成时，而从句用的是一般过去时，故选C。 2. Tom______the CD player for two weeks. A. has lent B. has borrowed C. has bought D. has had 析：A、B、C均为非延续性动词，在肯定句中不与表"段时间"的短语连用，故选D。3. I______a letter from him since he left. A. didn't receive B. haven't got C. didn't have D. haven't heard 析：据since可知，应排除A、C，"hear from sb.=receive/get/have a letter from sb."意为"收到某人的来信"，故选B。 三、have/has been (to, in)/have/has gone (to)的区别。如： 1. -Have you ever______Lintong to see the Terra Cotta Warriors?-Yes, I have. A. went to B. gone to C. been in D. been to 析：据句中的have，排除A，B项意为"去某地了"，C项意为"一直呆在某地"，D项意为"去过某地"，符合题意，故选D。 2. My parents ______ Shangdong for ten years. A. have been in B. have been to C. have gone to D. have been 析：本题句中有"for+段时间"结构，据此可排除C，B项意为"去过某地"，不合题意，D项缺介词，故选A。 四、现在完成时与其他时态的联系和区别。如： 1. Sun's aunt has gone there for ten years.(改成正确的句子) 析：非延续性动词与"段时间"连用时，除了把非延续性动词改成延续性动词外，还可把动词改为一般过去时或借助句型"It's +段时间+since+从句"进行句子转换。故答案为：Sun's aunt has been there for ten years. /Sun's aunt went there ten years ago. /It's ten years since Sun's aunt went there. 2. Susan has been in this city for more than ten years.(改为同义句) ________more than ten years ____Susan ______to this city. 析：据上题分析，且since引导的从句要用一般过去时，故填It is, since, came。 3. I won't go to the concert because I ____my ticket. A. lost B. don't lose C. have lost D. is coming 析：因我丢了票的动作发生在过去，而且对现在造成了我不能参加音乐会的结果，符合现在完成时所表示的含意，故选C。 一、单项选择 1、Both his parents look sad. Maybe they _______what’s happened to him . Ａ. knew Ｂ. have known Ｃ. must know Ｄ. will know 2、He has _______ been to Shanghai, has he?
现在完成时的构成 一）肯定式 主语＋助动词have ／has ＋过去分词＋其它 说明：这里的have ／has是助动词，没有什么具体意义。当主语是第三人称单数时助动词 用has，其余人称一律用have。has，have的缩略式分别为's或've。规则动词过去分词的构 成与过去式的构成方式一样，不规则动词可参看不规则动词表。实例： 1）I've just copied all the new words ．我刚抄写了所有的生词。(表示不要再抄了) 2）She has lost her books ．她丢失了她的书。（表示到目前为止还没有找到） (如果用过去时：She lost her books . 则强调书是过去丢的这一动作，而不知现在有没有找到) 3）We've just cleaned the classroom ．我们刚好打扫了教室。（表明现在教室是干净的） 二）否定式 主语＋助动词have ／has＋not＋过去分词＋其它 说明：现在完成时构成否定句时，只需在助动词have ／has后面加not就行。have not，has not的缩略式分别为haven't ，hasn't。另外，肯定句中有some，already时，改为否定时要分 别改成any，yet。实例： 1）I haven't finished my homework yet．我还没有完成我的作业。 2）She hasn't travelled on a train ．她没有坐火车旅行过。 3）We have never spoken to a foreigner．我们从来没有和外国人说过话。 注：有时not可以用never代替，表示“从来没有”的意思。又如： 4）I have never seen him before．以前我从来没有见过他。 三）一般疑问式 助动词Have ／Has ＋主语＋过去分词＋其它？ 说明：把陈述句中的have或has放到句首，句末打问号，同时把句中的some ，already改为any ，ye t就构成了一般疑问句。肯定回答用“Yes ，主语＋have／has．否定回答用“No，主语＋haven't／hasn't．”有时也可以用“No，not yet．／No ，never．／No，not even once．”等。实例：
（英语）高一英语现在完成时各地方试卷集合汇编含解析 一、单项选择现在完成时 1．It is the first time that Chinese teachers ________ in schools across Britain to introduce Chinese-style maths lessons and teaching approaches. A．taught B．teach C．have taught D．had taught 【答案】C 【解析】 【详解】 考查现在完成时。句意：这是中国教师首次在英国各地的学校教中国式的数学课和教学方法。The first time that表示“第一次……”，引导表语从句时，如果主句的系动词是一般现在时，从句用现在完成时，故C项正确。 【点睛】 It is/was the first time that表示“是第一次……”，引导表语从句时，强调到说话时间为止某一情况或动作的次数，从句既可以使用现在完成时，也可以使用过去完成时，需要根据主句的系动词判断，如果主句的系动词是is，从句用现在完成时，如果主句的系动词是was，从句则用过去完成时。 2．He is the only one of the students who _____ a winner of scholarship five times up to now. A．is B．are C．have been D．has been 【答案】D 【解析】 【详解】 考查现在完成时和主谓一致。句意：他是唯一一位三年奖学金获得者的学生。句中的先行词为the only one，在定语从句中作主语，故谓语动词用单数。根据句中的时间状语for three years，故时态用现在完成时。故D正确。 3．In the last few years, China ________ great achievements in environmental protection. A．was making B．made C．had made D．has made 【答案】D 【解析】 【详解】 考查时态。句意：在过去几年里，中国已经在环境保护方面取得了很大的成就。时间状语“In the last few years”表明应该使用现在完成时，故D项正确。 4．The Chin ese women’s volleyball team won the gold medal at the Rio Olympics, which is the third time the team Olympic gold.
人教版英语过去完成时知识点题型含答案 一、初中英语过去完成时 1．By the time the alarm clock went off, My mother had already _________. A. wake me up B. wake up me C. waken up me D. waken me up 【答案】 D 【解析】【分析】句意：闹钟响时，我妈妈已经把我叫起来了。根据句意，动词应用过去完成时，用had +动词的过去分词。wake up是动副结构，代词作宾语必须放中间，故选D。 【点评】考查本单元的目标句型，只要熟练背诵句型，找出答案很简单。 2．Mary thought of the party which she___________ for this day. A. plan B. planned C. had planned D. would plan 【答案】 C 【解析】【分析】句意：玛丽想起了她今天计划的聚会。plan的动作发生在thought of的动作之前，表示过去的过去，要用过去完成时had+过去分词。故选C。 【点评】考查过去完成时的构成和用法。注意过去完成时表示过去的过去含义。 3．The little boy me a few minutes before his mother showed up. A. stares at B. has stared at C. looks at D. had stared at 【答案】 D 【解析】【分析】句意：这个小男孩在他妈妈出现之前一直盯着我。根据stare这个动作发生在他妈妈showed up出现之前，是过去的过去，可知用过去完成时had+过去分词。故选D。 【点评】本题考查过去完成时，熟记过去完成时的结构had+过去分词。 4．The bus ______ for five minutes when Tim arrived at the station. A. went B. has left C. had left D. had been away 【答案】D 【解析】【分析】句意：当迪姆到达车站时，公交离开了五分钟了。表示到达车站前已经发生或完成的动作，句子用过去完成时态；leave是一个非延续性的动词，不能与表示一段时间的状语for…连用，可以表达成be away，形容词表示状态，可以与表示一段时间的状语连用。故选D。
一、时态讲解：现在完成时 （1）构成：现在完成时由助动词have + 过去分词构成，助动词have 有人称和数的变化。第三人称单数用has，其余用have. 现在完成时的否定式直接在助动词后面加上not、疑问式是把助动词提到主语之前。以study 为例，其否定式、疑问式和简单回答形式如下： 1）现在完成时通常表示在说话之前已经完成的动作或存在的状态。说话人强调的是该动作或状态对现在的结果或影响。 My daughter has just gone out. 我女儿刚出去。 I’m sure we’ve met before. 我肯定我们以前见过面。 She has arrived. 她到了。 2）表示持续到现在的动作或状态，往往和包括现在在内的表示一段时间的状语连用，如recently, already, just, lately, fo r…, since…,yet等。如： I haven’t heard from her these days. 这些日子我没有收到她的信。 We haven’t seen you recently. 最近我们没有见到你。 They have been away for two years. 他们离开已经两年了。 She has been with us since Monday. ★注意： a)since和for的区别 since后接时间点，如1993，last term, yesterday, the time I got there for后接一段时间，表示“长达多久”，如ten years, a while, two days等。 Exercise: 用since和for填空 1. Jim has been in Ireland ______ Monday. 2. Jill has been in Ireland ______ three days. 3. His aunt has lived in Australia ______15 days. 4. Mary is in her office. She has been there ______ 7 o'clock. 5. India has been an independent country ______1974. 6. The bus is late. They've been waiting ______ 20 minutes. 7. Nobody lives in those houses. They have been empty ______ many years. 8. Mike has been ill ______a long time. He has been in hospital ______ October. 1. since 2. for 3. for 4. since 5. since 6. for 7. for 8. since 2）表示短暂意义的动词如arrive, leave, borrow, buy, begin, start, die等，在完成时当中不能和表示一段时间的状语连用，因为它们表示的动作不可能持续。因此，不能说：
英语语法现在完成时的 基本例句 SANY标准化小组 #QS8QHH-HHGX8Q8-GNHHJ8-HHMHGN#
现在完成时的基本例句： 1．I have worked here since 1970. 自1970 年以来我就在这儿工作。 2．He has been to the Great Wall twice. 他已经去过两次长城了。 3．Mike has just finished his homework. 迈克刚做完他的作业。 现在完成时是描述过去发生的而与现在情况有关的事或状态（例2， 例3），或是从过去某时到现在为止这一段时间中发生的情况（例1），换言之，现在完成时是表现从过去到现在的事情。2 现在完成时的用法现在完成时的形式皆以“ have(has)+过去分词”来表示，有“继续”、“完了”、“结果”、“经验”等用法。 继续 I have studied English for three years. 我已经学习英语三年了。 She has been sick since last month. 她从上个月就生病了。 经验 I have visited Beijing many times. 我访问过北京好多次了。 Have you ever been to Hawaii 你曾经去夏威夷吗 完成 I have just finished my homework. 我刚刚完成我的家庭作业。 Has he finished his work yet 他作好工作了吗 结果 My brother has become a teacher. 我哥哥已经成为一名教师了。 I have lost my watch. 我手表弄丢了。（我现在仍旧没有表）
人教版英语过去完成时形式讲解含答案百度文库 一、初中英语过去完成时 1．By the first day of August, 2007, the PLA ________ for eighty years. A. founded B. has founded C. has been found D. had been founded 【答案】 D 【解析】【分析】句意：到2007年8月1日为止，中国人民解放军已经成立了80年了。句中有by+过去的时间，表示到…为止，句子用过去完成时，found成立，故选D 【点评】动词的时态是学习英语过程中非常重要的知识。现在完成时表示动词在过去发生对现在造成的影响。现在完成时往往和already,yet,for+一段时间，since+点时间的时间状语连用。过去完成时表示动作发生在过去的过去，句子中强调过去的动作对现在造成的影响。 2．— How long has the train been away? — Sorry. I don't know. By the time I got here, the train ________. A. has left B. was leaving C. had been away D. had left 【答案】 C 【解析】【分析】句意：——火车离开多久了？——很抱歉。我不知道。我到这儿的时候，火车已经离开了。由By the time I got here可知该用过去完成时，所以选C。 【点评】考查动词时态。 3．—How long you TV by the time I called you? —For about two hours A. had; watched B. have; watched C. did; watch D. were; watching 【答案】 A 【解析】【分析】由句中的by the time可判断．这里用过去完成时，故选A。句意是：—到我打电话给你为止，你已经看了多长时间的电视了？—大约两个小时。 【点评】本题考查过去完成时的用法。 4．By the time of last year, she the piano for five years. A. learnt B. has learnt C. had learnt D. will learn 【答案】C 【解析】【分析】句意：到去年的时候，她已经学了五年钢琴了。由时间状语By the time
现在完成时 一、用所给动词的适当形式填空 1. He is very hungry. He ______ (not eat) anything for three days. 2. We ______ (be) good friends since we met at school. 3. The boy is happy because he ____ (sell) out all the newspapers. 4. Where _____ you _______ (be) these days 5. We ______ (see) several members of the family since we ______ (arrive). 6. I _____ never ____ (eat) such delicious noodles before. 7. They ____ (be) to that small village several times. 8. I _____ (not go ) to the cinema because I ____ (see) the film before. 9. Could you tell me if you ___ (read) the story book 10. 二、选择填空 1. We ______ to the Great Wall several times. A go B were going D have gone D have been 2. --- ________ m y glasses ----- Yes, I saw them on your bad a minute ago. A. Do you see B. Had you seen C would you see D Have you seen 3. You _____ your turn so you ' ll have to wait. A will miss B have missed C are missing D had missed 4. I _____ my homework now. A finish B finished C have finished D had finished 5. He ___ for three years. A has joined B has been in the army C joined D has severed the army 6. His grandfather _____ for thirty years. A died B was died C has been died D has died 7. I _____ from my brother for a long time. A not have heard B have not heard C have heard not D do not hear 8. --- Did your brother go to America last year A. No, he did never go there B. No, he has never gone there C. No, he never was there D. No, he ' s never been there 9. He ___ that factory since 1958. A had left B has worked in C has gone from D has come to 10. Since ten years age, great changes _______ in China. A happened B have been happened C have happened D are taken place 11. Our teacher ____ to Beijing three times. A went B had gone C has gone D has been 12. It ' s the third time you ____ late this week. A had arrived B arrived C have arrived D arrive 13. ____ the film since I came here. A. I ' ve seen B. I will see C. I would see D I see 14. They are still building the new road. They ______ it so far. A didn ' t B don ' t finish C haven ' t finished D hadn ' t finished 15. How many times ______ you ___ to Beijing this year --- Three time. A have; been B had; been C have; gone D had; gone 16. She ____ the dictionary to Alice yet. A has returned B hasn ' t returned C would return D returned 17. Do you know Jack Smiths ------ Certainly. We ___ friends since ten years ago.