begoingto后面加什么形式

　　例句：

　　If you happen to be going to the post office, please get me some commemorative stamps.

　　你上邮局的话，捎带给我买几张纪念邮票。

　　We be going to the cinema tonight.

　　我们今晚可能会去看电影。

　　It all seemed to be going to plan.

　　似乎事情正按计划进行中。