He under a tree in the park.A.found lying B.was found lying

He under a tree in the park. A. found lying B. was found lying C. was found to lie
此处选B lying表状态,不是表动作
find sb doing,发现某人在干某事

改被动时是 be found doing

find sb do sth, 发现某人经常干或干了某事,短暂性动词较多

改被动时是 be found to do sth

根据此处判断是正躺着,表状态


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再答： I found a dog lying on the street just now. A dog was found lying on the street just now. I found a man enter the classroom just now. A man was found to enter the classroom just now. enter 动作比较短暂，已经发生也已经结束。
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