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过去进行时句型结构：

juxing

1.肯定句形式：主语+was/were +doing (现在分词)+其他。

I was doing my lessons then.

那时，我在做功课。

We were cleaning the house at this time yesterday.

我们这个时候在打扫房子。

2.否定形式：主语+wasn't/weren't+doing (现在分词)+其他。

I wasn't doing my lessons then.

那时，我没在做功课。

We weren't cleaning the house at this time yesterday.

我们这个时候没在打扫房子。

3.一般疑问句形式：Was/Were+主语+doing (现在分词)+其他?

肯定回答：Yes,主语+was/were.

否定回答：No, 主语+ wasn't/weren't.

—Were you doing your lessons then?

—Yes，I was. /No,I wasn't.

Were they cleaning the house at this time yesterday?

—Yes, they were./No, they weren,t.

4.特殊疑问句形式：特殊疑问词+was/were开头的一般疑问句?

—What was he doing at this time yesterday?

—He was reading books.