初二英语语法精讲：过去进行时
过去进行时表示过去某一点时间正在进行的动作或者过去某一段时间内一直进行的`动作。
1. 构成
was /were + doing，例如：
I was watching TV at 9 oclock last night.
at 9 oclock last night是时间点
They were playing football all afternoon.
all afternoon是时间段
2. 过去进行时的标志词
at 8 oclock last night, this time yesterday等。例如：
I was having lunch at home this time yesterday.
昨天的这个时候我正在吃午饭。
At that time she was writing a book.
那阵子她在写一本书。(表示她在那段时间里一直在做那件事情。)
★★练一练★★
用括号中所给动词的适当形式填空。
1. This time yesterday I ____ ______(read)books.
2. At 9 oclock last Sunday they ______ ______(have)a party.
3. When I _____(come)into the classroom, she ________ ______(read)a storybook.
4. She _____ ______(play)computer games while her mother ____ ______(cook)yesterday afternoon.
5. I _____ ______(have)a shower when you _______(call)me yesterday.
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