be just going to do有这个用法吗

be just going to do有这个用法吗 be going to doing有这个用法吗 be valuable to do sth有这个用法吗? be going to do结构的用法 be going to do之外有be going to doing有这个句型么, 有be determined to do这个用法么? be going to do 和be doing用法的区别? will be 与be going to do 的用法 be going to doing这种用法有吗? admit to do 有这个用法吗 will be doing,be going to do,will do ,有什么差别?be going to leav 将来时的用法be going to do 与will do 用法的区别