be 动词一般过去时否定句： 主语+be动词（was/were）+not+其他 I was not at home last night.
我昨天晚上不在家。
He was not tall when he was young.
他小时候长的不高。
We were not in Shanghai last year.
过去式
am
was
is
was
are
were
be 动词一般过去时肯定句：
主语+be动词（was/were）+其他
She was very busy yesterday.她昨天很忙。 She was very sad last week.她上周很伤心。 He was at school lat Tuesday.他上周二在学校。 They were my friends.他们以前和我是朋友。
一般过去时表示过去某个时间存在的状态， 通常和ago, last, yesterday, the day before yesterday, just now, a moment ago或具体的过去日期、年代 连用。
要表达过去的事，就要用到动词的过去式， be 动词的过去式形式为was/were： 原形
我们去年不在上海。
be 动词一般过去时一般疑问句： be动词（was/were）+ 主语+其他 Was he in the zoo? 他在动物园吗？ Were you in the playground just now?

你们刚刚在操场吗?
Were they at home last night?
他们昨天晚上在家吗？
be 动词一般过去时特殊疑问句：
特殊疑问词+be 动词+主语+其他
Where were you yesterday?
你昨天晚上去哪了？ What was there in the cup then? 那时，杯子里有什么?