一般过去时的讲解-1.ppt

动词过去式的变化 。 * 本资料来自于资源最齐全的２１世纪教育网 。 知识结构 构成 意义 常用时间标志 动词的过去式 1. 表示过去某个时间发 生的动作或存在的状态。 2. 表示过去经常或 反复发生的动作。 yesterday morning/afternoon last night/week/year/ Sunday/ in 1990 two years/weeks ago Grammar 一般过去时 1. 动词be的变化： was were am is are 2. 助动词do的变化： do→ did (在过去时里助动词do没有 人称和数的变化) 如：Did you play soccer yesterday? Did he play soccer yesterday? 3. 实义动词的变化： 实义动词分规则变化和不规则变化。 规则变化有以下几种： (1) 一般情况下在动词后加-ed。 e.g. play—played visit—visited 　 walk—walked clean—cleaned (2) 以不发音的e结尾的词，在词尾 加-d。 e.g. live—lived like—liked 　 dance—danced 　 hope—hoped (3) 以一个元音加一个辅音字母结尾的 重读闭音节结尾的单词，要先双写 这个辅音字母，再加-ed。 e.g. stop—stopped 　 drop—dropped 　 plan—planned (4) 以辅音字母加y结尾的单词，先改y 为i，再加-ed。 e.g. study—studied 　 carry—carried 不规则变化需要按一定的规律逐个 记忆。 规则动词词-ed的读音清念 /t/ ,元浊/d/ ; /t/ /d/ 之后念/id/ 1、清念 /t/ ，即 ed 在清辅音后面念 /t/ , 例：finished helped passed cooked 2.元浊 /d/ ,即 ed 在元音，浊辅音后面/d/ 例：borrowed enjoyed called moved 3、/t/ /d/ 之后念 /id/ , 即 ed 在 /t/ /d/ 音后 面念 /id/ 例：wanted shouted needed counted ◆不规则变化(需逐个记忆)： do — did come — came go — went sit — sat have — had can — could take — took give — gave put— put get — got 　 swim — swam 　eat — ate tell— told sleep — slept see — saw wear — wore lie — lay drink — drank find — found write — wrote can — could will — would sing — sang read — read do — did 　　　 go — went 　 read — read　　 see — saw get — got　　　 sit — sat 　　　　 have/has — had 　 am/is — was 在本单元中出现的不规则动词有以下几个： III. 写出下列单词的过去式 talk