It is a great honor for us ___ (invite) to thier dinner.

问题描述:

It is a great honor for us ___ (invite) to thier dinner.
为什么是 to be intived

被邀参加晚宴,我们倍感荣幸
to be invited ...是实际上的主语
而且此处我们是被邀的对象,要用被动态