过去完成时课件

过去 + 时态
٫
过去 完成 + 时态
从句
主句
Before I met her, I had heard a lot about her.
（2） by the time （= when） 到……时
我们赶到学校时，已经 上课了。
By the time ____________ we got to had school, the class ____ begun. already ________
B
D
3．（2011· 四川卷）19．—What a mistake! —Yes．I his doing it another way, but without success． A．was suggesting B．will suggest C．would suggest D．had suggested 4.（2011· 辽宁卷）By the time Jack returned home from England, his son______from college． A．graduated B．has graduated C．had been D．had graduated 5.（2011· 湖南卷）It is the most inspiring lecture that I ________since I came to this school． A．attended B．had attended C．am attending D．have attended
The Present Perfect Tense
现在完成时
have/has+过去分词
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.
D
D
D
6.（2011· 山东卷）She was surprised to find the fridge empty; the child _____ everything! A．had been eating B．had eaten C．have eaten D．have been eating 7.（2011· 福建卷）Last month, the Japanese government expressed their thanks for the aid they_____ from China． A．receive B．are receiving C．have received D．had received 8. She _____her keys in the office so she had to wait until her husband ____home. A .has left; comes B .had left; would come C .had left; came D .left; had come
B
D
C
New
The Past Perfect Tenses
过去完成时
构成？
现在完成时：
助动词have / has + 过去分词
过去完成时：
助动词had + 过去分词
I have known him for three years. 我认识他三年了。 I had known him when I was a student. 我当学生时，就已经认识 他了。
他们已经吃过早饭了。 They have already had breakfast. 在他们到旅馆之前他们已 经吃过早饭了。 They had already had breakfast before they arrived at the hotel.
我从未看过如此令人兴奋 的比赛 I have never seen such an exciting match before! 他说他从未看过如此令人 兴奋的比赛。 He said that he had never seen such an exciting match before!
当我昨天到达电影院时，电 影已经开始了。
When I got to the cinema yesterday, the film had already begun.
他说他从来没读过如此有趣的 故事。
He said that he had never read such an interesting story
当我到达火车站时，火车 已经开走了。 By the time I got ___ to the had station, the train ____ left . already _____
到上学期末，我们共学
1500 个单词。
By the end ___ of last ___ term we ___ had______1,500 learnt words
1.（2011· 天津卷）In the last few years thousands of films all over the word． A．have produced B．have been produced C．are producing D．are being produced 2.（2011· 北京卷）Experiments of this kind in both the U．S．and Europe well before the Second World War． A．have conducted B．have been conducted C．had conducted D．had been conducted
பைடு நூலகம்
He has become a doctor.
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. (1) recently, in recent years (2) For/in/during/over the last/past 30 years, great changes have taken place in my hometown.
Summary
过去完成时与现在完成时二者 用法基本相同，但现在完成时 以现在时间为基点，过去完成 时则以过去的时间为基点，与 现在无关，即过去的过去。过 去完成时常用于宾语从句中;
用于由by, before 等构成的短 语引导的从句或者通过上下文 表示。
具体用法如下：
Before / When / By the time/By By the end of
(3)Since + 过去的某一时刻, since nine yesterday since last week since you came since you got home. We haven’t seen each other since last year. We haven’t seen each other since we graduated from our university.
当他到学校时，他意识
到 他把作业忘在家里了。
When he ___ got to school, he realized that he _________ had left _______ his homework at home.
她说在我来之前她们已经 做好了一切准备。 She said theyhad ____made ____ all the preparationbefore _____ I came.
我已经做完作业了。 I have finished my homework.
表示在说话时已经做完。
在六点以前，我就已经完 成作业了。 By six o’clock, I had finished my homework. 表示在过去的某一段时间 （six o’clock 以前）已经做 完作业，与现在无关。
当我到达学校时，学生 们 都已经放学了。 had been over School _______ got by the time I ____ there.
当我迟到20分钟到机场时， 他已经乘出租车去宾 馆了。
He ___ had ______ taken a taxi to got to _ the hotel when I _____ the airport 20 minutes later.