he was asked to give us a talk.改为主动语态we asked him to give a talk对吗

题目

he was asked to give us a talk.改为主动语态we asked him to give a talk对吗

答案

有些问题,被动语态中看不出是by whom（被谁要求的）
因此改主动时只能是：
Somebody asked him to give us a talk.给我们作一次讲话,不一定是我们自已要求的,至少从被动句中未看出来,主语未明,用someone或somebody某人