初中英语过去进行时知识点：过去进行时结构
各位同学，大家应该为学习中有哪些知识点而困惑吧，小编为大家准备了过去进行时知识点：过去进行时结构，希望大家可以好好复习。2. 过去进行时的结构及句型变化
过去进行时由"was / were + 现在分词"构成。如：
I was doing my lessons then. 那时，我在做功课。
We were cleaning the house. 我们在打扫房子。
过去将来时态的肯定句、否定句和疑问句形式：
肯定句例句：I was walking down the street when a UFO landed.
否定句例句：I wasn't walking down the street when a UFO landed.
一般疑问句例句：Were you walking down the street when a UFO landed?
特殊疑问句例句：What were you doing when a UFO landed?
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