There is going to be a meeting next Friday.为什么是be?

There is going to be a meeting next Friday.为什么是be? There is going to be a meeting next week ,而不可以是There is goin there (is going to be)a meeting next monday afternoon.(is go There is going to be a sports meeting next week.(改为同义句) There is going to be a parents'meeting next Sunday morning.这 把There is going to be a sports meeting next week in out scho There is going to ( )a meeting next week.用be的适当 there is going to be a _____(sport)meeting tomorrow There is going to be a meeting toworrow.(同义句) There is going to be a football match next week There is going to be a fire drill next week. There is going to be a class meeting tomorrow morning是对的吗