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。如:
I was having a talk with Li Hua at that time. 那时,我正在跟李华谈话。
I was watching TV at home last night. 昨晚我一直在看电视。
2. 过去进行时的结构
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。
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