所以同学们掌握起来比较困.ppt

现在完成时态是中考的必考时态，由于现在完成时态既涉及到过去，又联系到现在，和一般过去时态，一般现在时态，现在进行时态既有联系，又有区别，所以同学们掌握起来比较困难。 现把这种时态的用法简单的总结一下，和各位老师共同切磋。,合贤学校,吕新华,1.现在完成时态表示过去发生的动作对现在造成的影响或结果 Our teacher has left. We have studied English. I have already finished the homework. He has had his lunch. He has become a doctor. 我们老师已经离开了. Our teacher has been away. (F) Our teacher has left.(T),错误的认识: (1)必须使用延续性动词. (2) 延续性动词必须和一段时间连用.,构成,have/has+过去分词,2.某个动作从过去已经开始,一直持续到现在,还有可能持续到将来.动作的持续性要通过一段时间来表示.,一段时间的表达方法有两种: for: +一段时间 for a year for two weeks for three years,Since 过去的某一时刻, since nine since last week 一般过去时态的时间状语从句 since you came since you got home.,注意:for 和since 所引导的时间状语都表示一段时间.,He has been away since last week.,He has been away since last week.,对划线部分提问都用How long,结束性动词不能和表示一段时间的时间状语连用,但是他可以转换成相应的延续性动词.,1.直接用延续性动词 buy have catch(get) a cold have a cold borrowkeep Come/go /becomebe put on- wear,2.转换成be+名词 join the army be a soldier Join the Party be a Party member go to school be a student,3转换成be+形容词或副词 diebe dead finish be over beginbe on leavebe away fall sleep be asleep close be closed,4.转换成 be+介词短语 go to school be in school join the army be in the army,1.我们买这本书三年了.,We have had the book for three years.,2.他感冒三天了.,He has had a cold for three days.,We bought the book three years ago.,He caught a cold three days ago.,一般过去时态和现在完成时态可以构成同意句,3.自从上星期我借的这本书,I have kept the book since last week.,4.我成为一个学生两年多了.,I have been a student for over two years.,I borrowed the book last week.,I became a student two years ago.,5.Mr Black死了三年了。,Mr Black has been dead for three years.,Mr Black died three years ago.,6.小名参军半年了。,Xiao Ming has been a soldier for half a year.,Xiao Ming joined the army half a year ago.,7.我们上了8年学了。,We have been students for eight years.,8.下课10分钟了,The class has been over for ten minutes.,9.电影开始了一小时了,The film has been on for an hour.,10.门打开半小时了,The door has been open for half an hour.,Exercises,Youve never seen such a wonderful film before, _? A havent you B have you C do you D dont you 2. -Ann has gone to Shanghai. -So _ her parents. 3. I have watched the game. -When _ you _ it? A have watched B do watch C did watch D will watch,4. Mr. Green _ in China since five years ago. A lived B has lived C lives D is going to live 5. His grandma _ for two years. A died B has been dead C was dead D has died,6. Where is Han Mei now? - She _ to Shanghai. She will be back in two days. A has gone B has been C goes D had gone 7. -_ to the United Stated ? - No, never,but I went to Canada a few years ago,8. You havent changed your mind,_? A do you B are you C have you D did you,9. How long have you _ the football team of the school? A been on B been at C joined D played 10. -Where have you _ these days? - I have _ to Dazhu with my friends. A been , gone B been , been C gone , been D gone, gone 11. How long have you _ this book? A bought B borrowed C had D lent 12. Excuse me, _ you seen the film yet? - Yes, I _ it last nig