1、主语:句中动作的发出者。 She made her brother the little John sad yesterday and she felt guilty.昨天她惹得她的弟弟小约翰伤心了，她感到内疚。 I see my son John studying at home, so I am happy.我看到我的孩子约翰在家里学习，我很高兴。 2、谓语:句中的动作。 She made her brother the little John sad yesterday and she felt guilty.昨天她惹得她 的弟弟小约翰伤心了，她感到内疚。 I see my son John studying at home, so I am happy.我看到我的孩子约翰在家里学习，我很高兴。