一、概念：

　　表示将要发生的动作或存在的状态及打算、计划或准备做某事。句中一般有以下时间状语：tomorrow, next day(week, month, year…),soon, the day after tomorrow(后天)等。

　　二、基本结构：

　　①be going to + do;

　　②will+ do.

　　三、否定句：

　　在be动词(am, is, are)后加not或情态动词will后加not成won’t。

　　例如：I’m going to have a picnic this afternoon.→ I’m not going to have a picnic this afternoon.

　　四、一般疑问句：

　　be或will提到句首，some改为any, and改为or，第一二人称互换。

　　例如：We are going to go on an outing this weekend. → Are you going to go on an outing this weekend?

　　六、同义句：be going to = will

　　I am going to go swimming tomorrow(明天). = I will go swimming tomorrow