现在完成时讲解一．基本结构：助动词have/has+过去分词(done)二．句型：否定句：主语+have/has+not+过去分词+其他.一般疑问句：Have/Has+主语+过去分词+其他.简略答语: Yes, 主语 + have/has.(肯定)No, 主语 + haven't/hasn't.(否定)三．用法（1）现在完成时表示过去发生或已经完成的动作对现在造成的影响或结果I have spent all of my money (so far).(含义是:现在我没有钱花了.)Guo zijun has (just/already) come. (含义：郭子君现在在这儿)My father has gone to work.(含义是:我爸爸现在不在这儿) （2）现在完成时可以用来表示发生在过去某一时刻的,持续到现在的动作（用行为动词表示）或状态（be动词表示）常与for（+时间段）,since（+时间点或过去时的句子）连用.①for+时段②since+过去一个时间点（译为：自从……以来）Mary has been ill for three days.I have lived here since 1998.四.has gone (to),has been (to), has been (in) 的区别Have/Has gone(to) :去了(现在不在说话现场)Where is your father？He has gone to Shanghai.Have/Has been (to) :去过（已不在去过的地方）My father has been to Shanghai.Have/has been in：呆了多久（还在所呆的地方）My father has been in Shanghai for two months. /since two months ago.五．现在完成时的标志1.现在完成时的含义之一是过去完成的动作对现在仍有影响,用以下四大标志词可以表达这种含义:* 以already, just和yet为标志He has already got her help.他已得到她的帮助。
He has just seen the film.他刚刚看过这场电影。
He hasn't come back yet.他还没有回来。
* 以ever和never为标志This is the best film I have ever seen.这是我曾经看过的最好的一部电影。
He has never been to Beijing.他从没有到过北京。
* 以动作发生的次数为标志He says he has been to the USA three times. 他说他已经去过美国三次了。
* 以so far（到目前为止）为标He has got to Beijing so far.到目前为止他已到了北京。
She has passed the exam so far.到目前为止她已经通过了考试。
2.过去已经开始的动作一直延续到现在, 甚至有可能继续延续下去,我们可以从动作“延续”的特性和“时间”点段的区分入手,进一步学习现在完成时。
* ①for+时段②since+过去一个时间点（过去从句）为标志注意： 1)现在完成时不能单独与过去的时间状语连用, 如yesterday, last week, three years ago等; 2)不能与when连用六．过去分词1 、规则动词：规则动词的过去分词的构成规则与规则动词的过去式的构成规则相同。
四点变化规则：(1)、一般动词，在词尾直接加“ ed ”。
work---worked---worked ,visit---visited---visited(2)、以“ e ”结尾的动词，只在词尾加“ d ”。
live---lived---lived ,(3)、以“辅音字母 + y ”结尾的动词，将 "y" 变为 "i" ，再加“ ed ”。
study---studied---studied ,cry---cried---cried(4)、重读闭音节结尾，末尾只有一个辅音字母，先双写该辅音字母，再加“ ed ”。
stop---stopped---stopped , drop---dropped--dropped2 、不规则动词：AAA型原型过去式过去分词Burst- burst- burst hurt- hurt- hurt let- let- let cost- cost- cost cut- cut- cutHit- hit- hit put –put- put set- set- set shut -shut –shut spread- spread- spreadRead- read -read read原形发音为/ri:d/,过去式和过去分词发音为/red/AAB型beat- beat- beatenABA型become- became- become run- ran- run come- came- come特殊情况ABB型bring- brought- brought buy bought bought build built builtburn burnt burnt catch caught caught dig dug dug feel felt felt fight fought fought find found found hear heard heardhold held held keep kept kept lay laid laidlead led led lose lost lost make made mademeet met met sell sold sold shoot shot shotsit sat sat stand stood stood sweep swept sweptteach taught taught tell told told think thought thought win won wonABC型begin began begun blow blew blown break broke brokenchoose chose chosen draw drew drawn drive drove drivendrink drank drunk fly flew flown forgive forgave forgiven forget forgot forgotten give gave given grow grew grownknow knew known sing sang sung swim swam swumthrow threw thrown write wrote written现在完成时练习(一)A)选用have, has填空:1.I _______ told him the news.2.She ________ come back from school.3.You ________ won the game.B)按要求改写下列各句:4.They have bought a computer.(改成否定句)_________________________________________5.He has lost his book.(先改成一般疑问句,再作肯定与否定回答)_________________________________________C) 单项选择6. -Where have you _____, Kate?-I've ______ to the bank.A. gone, goneB. been, beenC. gone, beenD. been, gone7. Her grandfather ______ for two years.A. diedB. has diedC. has been deadD. has been died8. It's six weeks ______ I met you last.A. whenB. sinceC. beforeD. for9. Tom and Jack have arrived at West Hill Farm already.A. have gotB. have gone toC. have been toD. have reached现在完成时练习（二）一、单项选择。
1、Both his parents look sad . Maybe they _________what's happened to him .（呼和浩特）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 years .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 changed ; 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 ; finished11、 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 made 13、—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 begunＣ. 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、句型转换。