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3. Master the usage of the past continuous tense.
What was he doing at that time last Friday morning?
What were we doing last Friday morning?
The past continuous tense
定义：过去进行时常表示过去某一时刻或某一阶段内正在进行的动作。
eg: We were watching TV at nine yesterday evening.
I was doing my homework yesterday morning.
What were they doing at that time?
They were dancing at that time.
Was he dancing at that time?
No,he wasn’t .
He wasn’t dancing at that time.
He was singing at that time.
What were they doing at that time?
They were running at that time.
What was she doing at that time?
She was swimming at that time.
构成：
was/were + doing
主语＋was/were + doing+其他.
主语＋was/were not+ doing+其他.
Was/Were＋主语＋其他？
Yes,主语+ was/were .
No,主语+ was/were not.
肯定句：
否定句：
一般疑问句：
肯定回答：
否定回答：
was not=wasn’t were not=weren’t