Question

改一个句子改为被动语态I often see the old man exercise in the park.改为被动

Answer 1

都醒醒吧,应该为 The old man is often seen to exercise in the park.这是语法规则不带to的动词不定式作宾语补足语的主动语态,改为被动语态时不定式前要加to."see sb.do sth."的被动语态要加“to”,即：be seen to ...