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; finishB. Are; finishingC. Did; finishD. Have; finished2. -______ you ______anywhere before? -Yes, but I can't remember where I______A. Did; surf; surfedB. Have; surfed; surfedC. Did; surf; have surfedD. 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. afterB. beforeC. sinceD. 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 lentB. has borrowedC. has boughtD. 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 receiveB. haven't gotC. didn't haveD. 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 toB. gone toC. been inD. 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 inB. have been toC. have gone toD. 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. lostB. don't loseC. have lostD. 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 know2、He has _______ been to Shanghai, has he?Ａ. already Ｂ. never Ｃ. ever Ｄ. still3、Have you met Mr. Li ______？Ａ. just Ｂ. ago Ｃ.before Ｄ.a moment ago4、The famous writer _____ one new book in the past two year .Ａ. is writing Ｂ.was writing Ｃ.wrote Ｄ.has written5、—Our country ______ a lot so far .—Yes. I hope it will be even ____Ａ. has ch anged ; well Ｂ. changed; goodＣ. has changed ; better Ｄ. changed; better6、Zhao Lan ______already ______in this school for two years .Ａ. was; studying Ｂ. will; studyＣ. has; studied Ｄ. are; studying7、We ______ Xiao Li since she was a little girl .Ａ. know Ｂ. had known Ｃ. have known Ｄ. knew8、Harry Potter is a very nice film. I_______ it twice .Ａ. will see Ｂ. have seen Ｃ. saw Ｄ.see9、—These farmers have been to the United States—Really? When _____ there?Ａ. will they go Ｂ. did they goＣ. do they go Ｄ. have they gone10、—______ you ___ your homework yet ?—Yes. I _____ it a moment ago.Ａ. Did; do; finished Ｂ. Have; done; finishedＣ. Have; done; have finished Ｄ. will; do; finish11、His father ______ the Party since 1978 .Ａ. joined Ｂ. has joined Ｃ. was in D. has been in 12、—Do you know him well ?—Sure .We _________ friends since ten years ago .Ａ. were Ｂ. have been Ｃ. have become Ｄ. have mad 113、—How long have you ____ here ?—About two months.Ａ. been Ｂ. gone Ｃ. come Ｄ. Arrived14、Hurry up! The play __________ for ten minutes.Ａ. has begun Ｂ. had begun Ｃ. has been on Ｄ. Began15、It _____ ten years since he left the army .Ａ. is Ｂ. has Ｃ. will Ｄ. Was16、Miss Green isn't in the office. she _______ to the library.Ａ. has gone Ｂ. went Ｃ.will go Ｄ. has been17、My parents ______ Shandong for ten years.Ａ. have been in Ｂ. have been toＣ. have gone to Ｄ. have been18、The students have cleaned the classroom, ?A. so theyB. don’t theyC. have theyD. haven’t they19 has Mr White been a member of Greener China since he to China?A. How soon, comesB. How often, gotC. How long, cameD. How far, arrived20、His uncle for more than 9 years.A. has come hereB. has started to workC. has lived thereD. has left the university二. Use “never, ever, already, just, yet, for, since” to fill in the blanks.1. I have _______ seen him before, so I have no idea about him.2. Jack has _________ finished his homework.3. Mr. Wang has taught in this school ________ ten years.4. “Have you ________ seen the film?” “No, I have ________ seen it.”5. “Has the bus left _______?” “Yes, it has _________ left.”三、用have / has been to / in, have gone to及go的各种形式填空。