be going to doing有这个用法吗

be going to doing有这个用法吗 be going to do之外有be going to doing有这个句型么, be going to,be doing,will do有什么区别 be doing与be going to do有什么区别? be going to doing这种用法有吗? be to do.be going to do.be doing.will do.有什么区别? 将来进行时有be going to be doing这个表达形式吗 英语be going to do还是doing be look forward to doing这个对不对有没有这个 be doing (现在进行时表将来）和be going to do有什么区别 be going to be,will be和be doing在用法上有什么区别,什么时候用什么 be doing be is going to will用法的区别 will,be going to,be doing用于一般将来时的区别 关于worth,有be worth to doing这个句型? will be doing,be going to do,will do ,有什么差别?be going to leave是错的吗?还有be leaving如题 be doing和be going to的区别和用法!be doing和be going to的区别和用法 be going to 等于什么? be going to doing 还是 to do? be going to be doing和will be doing表示的是什么意思?