我很荣幸接受您的邀请。

I am ___honoured to accept your invitation.

如果您能加入我们一天，我们将深感荣幸。

We would be ___honoured if you would join us for the day.

如果您能在这个活动中颁发奖项，我们将倍感荣幸。

We would be ___honoured if you could present the prizes at this event.