be doing和be going to do和 be about to do no matter what和whatever尽量详细点
问题描述：
be doing和be going to do和 be about to do no matter what和whatever尽量详细点
答
be doing是现在进行时的句型
be going to do是一般将来时的句型
be about to do 好象是决定做某事
no matter what和whatever基本相同,大学老师都不要求区分