2014年春八年级英语下册现在完成时2014年春八年级英语下册现在完成时.ppt

现在完成时 现在完成时构成 have /has+v 过去分词(及物动词) 按要求进行句型转换 He has already finished his homework.(一般问句，并作肯定、否定回答) I have never been to Beijing before.(一般问句) They have learned around five units.(提问) have/has gone tohave/has been to have/has been in have/has gone to:已经去了或在途中，还没有返回； have/has been to:曾今去过某地，现在已经回来了,后面可接表示“次数”的状语; have/has been in:表示某人“已在某地停留一段时间，现仍在那里”，其后常带表示一段时间的状语。 Exercises Tom 在哪儿？ 他去书店了。 我在北京待了5年了。 Jack 去过上海两次了. 同学们要注意现在完成时与一般过去时的区别。虽然这两个时态都和过去发生的事情有关，但是现在完成时强调这一动作与现在的关系，如对现在产生的结果、影响等，而一般过去时只表示过去的事实，不表示和现在的关系。如： I went home at 10:00 yesterday. I have got home now. 我昨天十点回家的。现在我已经到家了。 I have already finished my homework. I finished it an hour ago. 我已经写完作业了，我是一个小时之前写完的。 6. He left here 2 years ago. --- He ____ ____ ____ from here for 2 years. 7. The film began 30 minutes ago. --- The film ____ ____ ____ for 30 minutes. 8. They opened the door an hour ago. --- The door ____ ____ ____ for an hour. 9. They closed the door an hour ago. --- The door ____ ____ ____ for an hour. 10. He joined the army last year. --- He ____ ____ a ____ for a year. --- He ____ ____ ____ the army for a year. --- It ____ a year ____ he joined the army. 8. My father _____ (read) the novel twice. 9. Wu Dong _____(be) a soldier for one year. 10. The students ______(study) in the middle school since last month. 11. How long ______ you ______(know) him? 12. Mike ______ (make) quite a few friends since he came to China. 13. I _____(give) my friend a nice book recently. 14. Li Ping and Wu Dong ______(see) the old man three times. 15. _____ she ever _____(teach) you English? 16. These children _____ (stay) in the park for two hours. 这本书我已经借了三星期了。 一般过去表达： I borrowed the book three weeks ago. 用现在完成时态表达(用延续性动词) I have kept the book for three weeks /since three weeks ago. 用it is …since –从句(用终止性动词的过去式) It is three weeks since I borrowed the book. 他到北京已经有三天了。 He arrived in Beijing three days ago. He has been in Beijing