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Was Tony studying at 8.00 o'clock last night?

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Was Tony studying at 8.00 o'clock last night?
Was Tony studying at 8.00 o'clock last night?
这句中的studying到底动名词还是现在分词?
过去式后面的动词用ing形式?这是什么样子的语句呢?
Was Tony studying at 8.00 o'clock last night?
此句中的studying是分词形式.
be doing sth 是表示进行时
am/is/are doing是现在进行时,表示正在进行的动作.
was/were doing 是过去进行时,表示过去的某个时间正在进行的动作.
e.g.i'm reading.我现在正在看书.
i was reading when you called me.你电话我的那个时候,我正在看书.
明白了吗?