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來源：網絡資源 2022-03-13 21:27:05
謂語部分構成
was/ were+doing
句式
肯定句：I was watching TV at that time.
否定句：I was not (wasn’t) watching TV at that time.
一般疑問句： Were you watching TV at that time?
特殊疑問句： What were you doing at that time?
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