过去进行时的用法（上）
过去进行时主要表示过去某一时刻正在进行的动作，或表示过去某一阶段一直在进行的动作。
1. 构成：
助动词was (were) + 动词的现在分词。如：
I was having a talk with Zhang Hong at this time yesterday. 昨天这个时候我正在跟张红谈话。
They were watching TV at home last night. 昨晚他们一直在看电视。
2. 基本句型：
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肯定式
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疑问式
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否定式
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I was doing
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Were you doing?
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I was not doing
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He / She / It was doing.
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Was he / she / it doing?
Yes, he / she / it was.
No, he / she / it wasn’t.
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He / she / it was not doing.
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We were doing.
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Were we doing?
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We were not doing
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You were doing
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Were you doing?
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You were not doing
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They were doing
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Were they doing?
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They were not doing
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