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关于不定式用法The young man was seen ____ into a police car just a

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关于不定式用法
The young man was seen ____ into a police car just a few minutes ago.
这里的空不能用不定式的原因是?是不是时态的什么问题?
什么时候的see sb do可以改成be seen to do?
关于不定式用法The young man was seen ____ into a police car just a
被动语态要加上 to
再问: nonononono 这是一个难点啊,并不是有被动语态就要用不定式
再答: 稍等 在主动语态中,make , let , hear , see , watch , notice 等词,其后跟省略to的动词不定式(动词原形),在变为被动语态时,必须还原动词不定式符号to.如: We heard him sing this song in the room. He was heard to sing this song in the room. The boss made him work 14 hours a day. He was made to work 14 hours a day. I see him walk to school He is seen to walk to school.