Hello everyone."I am going to be working to a very tight schedule."这句话中为什么连用两个ing形式呢?我知道going to是表将来时,可这个working怎么讲呢?

Hello everyone."I am going to be working to a very tight schedule."这句话中为什么连用两个ing形式呢?我知道going to是表将来时,可这个working怎么讲呢?
work是一个及物动词为什么不直接用going to work a very……呢？