Jim was seen () out of the room

题目

Jim was seen () out of the room
为什么不是go或going?

答案

原型是see ...do变为被动语态要加to,即be seen to do sth.原句的主动表达：Sb see Jim go out of the room.be seen to do sth.表示主语做的动作整个过程（一般比较短）都被看到.be seen doing sth.强调被看到时动作...