A little girl was seen to fall into the lake by a PLA man.he jumped into the water to save her....
问题描述：
A little girl was seen to fall into the lake by a PLA man.he jumped into the water to save her....
A little girl was seen to fall into the lake by a PLA man.he jumped into the water to save her.请问这两句正确吗?如果正确的话,为什么在seen后用to fall?又为什么在water后用to save?
答
正确的.第一个句子用的是see sb.do sth.的被动.其变为被动是：be seen to do sth.这是感官动词变被动时的规则,主动变被动,切记要加to.若是see sb.doing sth.变为被动则是：be seen doing .
第二个不定式做的是目的状语.
加油!