Jim was seen () out of the room

问题描述:

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

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...