九年级unit12过去完成时方案.ppt

6:50 8:00 now * * * * * * * * * * * * 复习巩固:动词的过去式和过去分词 blow blew blown draw drew drawn grow grew grown know knew known throw threw thrown fly flew flown buy bought bought bring brought brought think thought thought teach taught taught catch caught caught begin began begun ring rang rung sing sang sung sink sank sunk swim swam swum tell told told sell sold sold keep kept kept sweep swept swept sleep slept slept oversleep overslept overslept 过去完成时表示在过去某一时间或动作之前已经发生或完成了的动作， 即“过去的过去”。 ----|---------------- |--------------|------------ 　　　　　 一、过去完成时的概念与结构特点 那时以前 那时 现在 构成：主语+助动词 had + 过去分词  1.They had already had breakfast before they arrived at the hotel. 　　 2.--Had you known anything about our school before you came here? --Yes, I had. / No, I hadn’t. 一般说来，各种时态都有特定的时间状语。与过去完成时连用的时间状语有： （ 1 ） by + 过去的时间点。 I had finished reading the novel by nine oclock last night. （ 2 ） by the end of + 过去的时间点。 We had learned over two thousand English words by the end of last term. （ 3 ） before + 过去的时间点。如： They had planted six hundred trees before last Wednesday. 1.Tom ran back to school because she had left her magazine in the classroom. Tom ran back to school. Tom left her magazine in the classroom. 2.Simon left school late because the football game had started late. a.Simon left school late. b.The football game started late. 3.Daniel arrived late --- he had gone to the wrong cinema. a. Daniel arrived late. b. Daniel went to the wrong cinema. 4.Amy had lost her purse and had to go to the police station. a. Amy lost her purse. b. Amy went to the police station. 过去完成时典型错误例析： 1.昨晚我们看了电影。 a. We had seen the film yesterday evening. b. We saw the film yesterday