am， is → was, are → were
主谓宾结构 Did+ 主语+ v. 原形+ 其他？ Yes, 主语+did. No, 主语+didn’t. Did you go to the zoo yesterday? Yes, I did. No, I didn’t.
b.
ed cry—cried try---tried carry---carried D. 单词中只有一个元音字母,其后紧跟一 个辅音字母(重读闭音节结尾的), 双写辅 音字母再加-ed stop---- stopped swim---- swimming
一些不规则动词需要单独记忆: is—was are—were do—did go—went can—could have—had
Grammar
Байду номын сангаас
一。一般过去时 1. 意义：一般过去时用于表示过去发生的动 作或存在的状态。通常与表示过去的时间 状语连用． I go to school every day. I went to school yesterday. 2.一般过去时的构成： 主语+谓语动词的过去式+其他成分
陈述句 a.主系表结构： 主语+ was/ were + 其他. I was at home yesterday. We were at home yesterday. b. 主谓宾结构： 主语+ 动词过去式+ 其他. I went to the zoo yesterday.
E.
3.动词过去式的构成：
A.规则动词直接加- ed look----looked open---- opened ask---- asked B.以不发音e结尾的动词加d, arrive---- arrived live---lived
C.以辅音字母加+y结尾的,把
y 变为i加
一般疑问句： a. 主系表结构
Was/ Were + 主语 + 其他 Yes, 主语+ was/ were. No, 主语+ wasn’t/ weren’t. Were you at home yesterday? Yes, I was. No, I weren’t.
注：was , were为be 动词的过去时。