用and连接的并列主语 谓语动词用 are
my father and i 【are】 going to a trip in the mountains next sunday是对的
如果是neither nor 或者either or 就采取就近原则,以后面的人称代词为准
neither my father nor i 【am】 going to a trip in the mountains next sunday
either I or my father 【is】 going to a trip in the mountains next sunday