1、.please look at these phrasessee a filmvisit your grandpa study English tell a storyI have seen a film.I have visited my grandpa.I have studied English.I have told a story.原形原形 过去式过去式 过去分过去分词词see -saw -seenShe has seen a film.She has visited my grandpa.She has studied English.She has told a story.I
2、have seen a film.I have visited my grandpa.I have studied English.I have told a story.我已经看过电影。（我已经看过电影。（看过电影了，对电影比较熟悉，不想再看了）看过电影了，对电影比较熟悉，不想再看了）我已经看望过我的爷爷。（我已经看望过我的爷爷。（见过爷爷，了解爷爷的状况）见过爷爷，了解爷爷的状况）我已经学习了英语。（我已经学习了英语。（懂得了一些英语懂得了一些英语）我已经讲了一个故事。（我已经讲了一个故事。（现在已经了解了故事的内容现在已经了解了故事的内容）1.在以前某个时间已经发生的行为在以前某个时间已
3、经发生的行为 或或 曾经做过的事情曾经做过的事情 对现在有某种影响对现在有某种影响2.过去已经开始，一直延续到现在的动作或状态过去已经开始，一直延续到现在的动作或状态-现在完成时现在完成时肯定句结构为：肯定句结构为：主语主语+have/has+动词的过去分词动词的过去分词We have finished our homework.He has worked out the answer.动词的动词的过去分词过去分词有规则变化有规则变化和和不规则变化不规则变化两种两种规则变化和一般过去时的动词变化规则一样规则变化和一般过去时的动词变化规则一样1.一般情况下直接加一般情况下直接加-ed watch
4、watchedwatched2.以以不发音字母不发音字母e 结尾的，直接加结尾的，直接加-d：movemovedmoved3.以以“辅音字母辅音字母+y”结尾的结尾的，变，变y 为为i，再加，再加-ed carrycarriedcarried4.以一个辅音字母结尾的重读闭音节的动词以一个辅音字母结尾的重读闭音节的动词要要双写最后一个辅音字母再加双写最后一个辅音字母再加-ed：stop stopped-stopped不规则动词表见课本不规则动词表见课本p126-129一、一、AB-C型型do-did-donego-went-gonesee-saw-seeneat-ate-eatendrink-drank-drunk二、二、A-B-B型型feel-felt-feltbuy-bought-boughtfind-found-foundbuild-built-builthear-heard-heard三、三、A-A-B型型 beat-beat-beaten四、四、A-B-A型型run-ran-runcome-came-comebecome-became-become五、五、A-A-A型型put-put-putlet-let -letcut-cut-cut
