The missing boy was last seen ____ near the river. A,to play B,to be playing C,play D,playing 为什么不选A,这里被动语态应该加to啊?选什么?为什么?
人气：427 ℃ 时间：2019-10-19 17:43:28
解答
选D. The missing boy was last seen _playing_ near the river. 这里是see sb. doing sth. 变化而来.see sth. doing sth.表示看到一个瞬间,而不是全过程. 假如本句主动态改为:I saw him play near the river.表示:我看到他在河边玩的全过程. 那么本句就该选A.
