教案E.g, He has seen the film several times. 这部电影他已经看了好几次了。
（已完成）E.g. I have known her for a ling time. 我认识她很长时间了。
（未完成）否定句：主语+have/has+not+ 过去分词+其他一般疑问句：have/has+not+ 主语+过去分词+其他（四）常用时间状语：“ since+ 时间” ，“for+ 时间段” 及how long, since, ever, never, already, yet, twice, so far, up to now, over the years, in the last/past few years.1. Si nee表示“自从... 以来”时，无论是用作介词、连词还是副词，since通常要与现在完成时连用。
如：I' ve had nothing to eat since lun chtime. 从中午至U现在我什么都没吃。
It has bee n a long time since the TFboys foun ded. TFboys 成立很久了。
It has ten years si nee he left here. 他离开这儿已10 年了。
2. In the last few years/ in the past few years ，“在过去的几年”表示从现在算起的过去一段时间内，通常要与现在完成时连用。
如：The house has cha nged hands three times in the last two years. 在过去的两年中，这栋房子已转手三次。
I' ve see n little of her in the past few weeks. 近几周我很少见到她。
3. Over the years “这些年来”“经过这么多年之后” “最近几年”，通常表示从现在算起的过去几年。
She' s brought us so much happ in ess over the years. 这些年来，她给我已有500人在地震中丧生注意：与表示次数的once,twice,three times 等连用是，只能用Have been to.She has bee n to Europe twice. 他到欧洲去过两次。
另外，have been to 除了可接地点表示去过某地外，有时可以接活动，表示去 参加过某种活动，或接动词原形（尤其是动词 see ），表示去做某事。
如： She ' s just been to a party. 她刚参加了晚会回来。
He has n ever bee n to see me since I have bee n ill.我生病以来他从未来看 过我。
（六）现在完成时的肯定句中 瞬间动词（buy,die,join, come,go leavejoin... ） 不能直接与fo 叶时间段，since+时间点连用。
要将其改为延续性动词。
口诀：开始离去，借来还，出生入死，买到家。
+开关结束Beg in, leave,go,borrow,come,retur n, leavejo in, die,buy,arrive.3. 用 be 代替 becomeHow long has your sister bee n a teacher?4. 用 have a cold 代替 catch a coldTom has had a cold since the day before yesterday. Beg in-- be oncome/arrive/reach/join leave-- be awayOpen--be ope n1. Have 代替 buyMy brother has had 2. Keep/haveI have kept go out---be out -be in die--be dead close---be closed （不能用 has bought 代替borrow （不能用 haveborrowed borrow--keep Return--come back to Buy--have finish ——be over ）this bike for almost four years.the book for quite a few day.教学练习一、判断以下句子的时态。
1. He is a worker.2. I played basketball yesterday.3.1 'e washed the car.4. My father goes to work by car every day.5. Xiao Ling always studies hard.6. You and I will work in the same factory.7. Jia Min sometimes plays computer games.8. She is reading an English book.9. My mother is going to Shanghai tomorrow.10. Shall I get your coat for you?11. You should take the medicine three times a day.12. I am never late for school.13. What was she doing at nine o ‘ clock yesterday?14. Rose usually goes shopping with her mother.二、单项选择。
1、_________________________________________ Both his parents look sad. Maybe they ____________________________________ what s happened to him .A . knewB . have knownC . must know D. will know2、He has ______ been to Shanghai, has he?A . alreadyB . neverC . everD . still3、_______________________ Have you met Mr. Li ?A. just B . ago C .before D .a moment ago4、_____________________ T he famous writer one new book in the past two year .A . is writingB .was writingC .wroteD .has written5、一Our country _____ a lot so far . —Yes. I hope it will be eve n ___A . has changed ; wellB . changed; goodC . has changed ; better D. changed; better6、_______________ Z hao Lan ____ already in this school for two years .A . was; studyingB . will; studyC . has; studied D. are; studying7、We ____ Xiao Li since she was a little girl .A . knowB . had knownC . have knownD . knew8、Harry Potter is a very nice film. I ______ it twice .A. will see B . have seen C. saw D .see9、一These farmers have been to the United States —Really? When ________ there?A . will they goB . did they goC . do they goD . have they gone10、一_____ y ou ___ your homework yet ?A . Did; do; finishedB .C . Have; done; have finishedD .11. ______________ His father the Party si nee 1978 .A . ioinedB . has ioined—Yes. I _____ i t a mome nt ago Have; done; fini shed will; do; finish C. was in D. has bee n in2.我以前从来没去过那个农场。
（never ）—Sure .We _________ frie nds since tenC . have becomeD . have made 11、一 How long have you hereA . beenB . gone 12、 Hurry up! The play ________ for tenminutes.A . has begunB . had begunC . has been onD . Began13、 I t _____ ten years since he left the army .A . isB . hasC . willD . Was14、Miss Green isn't in the office. she ______ to the library. A . has gone B . went C .will go17、My parents _____ Shandong for ten years. A . have been in B . have been to C . have gone to 15、Thestudents have cleaned the classroom, ?A. so theyB. don' t theyC. have theyD. haven' t they 19has Mr White bee n a member of Gree ner China since heto Chi na?A. How soon, comesB. How often, gotB. C. How long, came D. How far, arrived20、His un clefor more tha n 9 years.A. has come hereB. has started to workB. has lived there D. has left the university三、句型转换。