表示将要打算发生的事情或动作，常与tomorrow， next week(year； Tuesday)， this week( weekend ；evening； afternoon；)today等词连用。结构是主语+be(am， is， are) going to + 动原或主语+will +动原。
如：What are you going to do tomorrow？ I am going to have a picnic.
你明天要去干嘛？我要去野餐。
The childre are going to have a sports meeting next week.
孩子们下个星期将参加运动会。
Tom will/is going to see a play with his father this evening.
Tom今晚将和父母去看演出。
问句将be动词或will移前；否定句在be动词或will后加not.