will、be going to 、shall为一般将来时时候的区别以及它们的用法

be going to will have is going to be /will going to be /are going to be 应该用在哪 be going to 是=will呢,还是will be? will和be going to的用法 用will ,be going to 造句 be going to和will的区别 will和be going to的区别 be going to 与will用法 be going to 和will的区别 will与be going to 的区别 will和be going to的区别? be going to 和will的区别 will和be going to的区别 want,will,be going to 的区别 be going to 和 will 的区别 will和be going to 的区别 be going to be和will be的区别 请教will,be going to,be to的区别?