will通常用于现在制定的未来要做的计划，而be going to是用于过去制定的现在提到的将来要做的事情。比如：A和B碰面。A: I will hold a party tomorrow. B: OK. We will invite a lot of people.这时B又去和C说。B: A and I are going to hold a party, so we are going to invite a lot of people.在北京新东方新概念的课上，学到更多关于时态的知识点，欢迎来学习。