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the old man was often seen ___ by the lake

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the old man was often seen ___ by the lake
the old man was often seen ___ by the lake
walk,但是不理解句型,see不是该接do吗?
see sb do其实是do 前面省略了to,在变成被动态时to要还原.如同make sb do -- sb be made to do
再问: 你还请问所有接do的动词在被动语态中都要还原to吗?
再问: 你好,,,打错了
再答: 不是。只有感官动词使役动词的被动有这种用法,是考点
再答: 感官动词如hear , watch, notice ; 使役如make,leave