英语：过去完成时态课件.ppt

Welcome to our class! 一般过去时态 The simple past tense Revision: 一般过去式的用法 1）一般过去时表示过去某个时间发生的动作或状态，常和表示过去的时间连用，yesterday, last night, in 1990, two days ago，just now,at that time等。 2）也表示过去经常或反复发生的动作，常和often, always等表示频度的时间状语连用。 构成：主语+谓语（动词的一般过去式）+其他 ( )1． ＿＿＿＿＿＿your father at work the day＿＿＿＿yesterday﹖ A． Was; before B． Is; before C． Was; after D． Is; after ( )2.The twins＿in Dalian last year． They＿＿＿＿here now． A． are; were B． were; are C． was; are D． were; was 过去完成时态 The past perfect Tense 教学重、难点： 过去完成时的的巩固及运用。 2.过去分词的构成。 3.与现在完成时的区别 过去完成时可以表示过去某一时刻或某一动作之前完成的动作或呈现的状态。也就是说发生在“过去的过去”。 定义： 构成：had＋过去分词 构成：had＋过去分词 否定式： 主语+hadn’t+p.p.+…. 一般疑问式： Had+主语+p.p.+…? 肯定答语： Yes, 主语+had 否定答语： No， 主语+hadn’t 肯定式：主语+had+p.p.+…. 构成：had＋过去分词 1：I had learnt 5000 English words by the end of last week. 2：I hadn’t learnt 5000 English words by the end of last week. 3：Had you learnt 5000 English words by the end of last week ? 4：How many English words had you learnt by the end of last week ? 6:00 7:00 现在 By the time I got up, my sister had already washed all the clothes. 1.我到家时她已经去睡了。 By the time I got home, she had already gone to bed. 2.到昨天晚上时消息已传遍全球。 By yesterday evening the news had spread through the world. 过去分词的变化： 规则动词的变化 (regular verbs )： a) 一般情况下在动词后面加 ed work ------ worked play -------- played b) 以 e 结尾的动词直接加 d use ------ used refuse ------ refused c) 以辅音字母加 y 结尾的动词，把 y 改 i 再加 ed study ----- studied carry ----- carried d) 以重读闭音节结尾的，前面有单个元音字母时，双写辅音字母，再加 ed stop ---- stopped drop ------- dropped beg-begged prefer; plan; admit - admitted 常用的时间状语等标志词： 1、by, before, when, by the time等构成的短语或引导的从句。 1)By the time she came to the bus stop, the bus had already gone. 2) We had finished the task before last midnight 3) When I arrived at the post office, I found that I had left the letter at home 4) After I had finished my homework, I went to bed. 2、 由sai