一般过去时：昨天发生的事

一句话记住

事情发生在过去，动词要换上「过去式」这身衣服。

be 动词的过去式

am / is 变成 was，are 变成 were：I was happy yesterday.（我昨天很开心。）They were at home last night.（他们昨晚在家。）否定加 not：She was not (wasn’t) at school.（她昨天不在学校。）

实义动词的过去式

大部分动词加 ed：play → played（玩了）、watch → watched（看了）、visit → visited（拜访了）。I watched a film last night.（我昨晚看了一场电影。）We visited Grandma last Sunday.（上周日我们看望了奶奶。）

时间信号灯

yesterday（昨天）、last week（上周）、last year（去年）、two days ago（两天前）、just now（刚才）。看到这些词，动词要用过去式。

疑问句和否定句

借助小助手 did，而且动词要变回原形：Did you go to the park?（你去公园了吗？）I did not (didn’t) watch TV.（我没看电视。）注意：did 一出现，动词恢复原形，不说 Did you went?

小故事

Yesterday was Sunday.（昨天是周日。）I got up late.（我起得很晚。）In the morning, I cleaned my room.（上午我打扫了房间。）In the afternoon, I played basketball with Tom.（下午我和汤姆打了篮球。）We were tired but happy.（我们累但开心。）

常见误区

一、did 后面用原形：didn’t go，不是 didn’t went。
二、be 的过去式 was / were 别和 did 混用：不说 I was watched TV.。
三、过去式全句统一：主语是三单也不再变化，He played. 不是 He playes.

练一练

把这三句变成过去时：I am happy. / She walks to school. / They play games.