例子:
1、.What did you buy yesterday?你昨天买了什么?分析:什么“被买”了?---object2.Who met you at the airport?谁昨天在机场接你的?分
1.What did you buy yesterday?你昨天买了什么?
分析:什么“被买”了?---object
2.Who met you at the airport?谁昨天在机场接你的?
分析:谁接你?---主动动作,即subject