We are going to visit the Museum of Chinese History.我们要去参观中国历史博物馆。(表打算)

　　Little Wang studies very hard，he is going to try for a scholarship.小王学习非常努力，他将争取获得奖学金。(表决心)

　　Look at those clouds. It's going rain.瞧那些云，要下雨了。(表估计可能)

　　The wall is going to collapse! 那墙要倒塌了? (即将)

　　2) go, come, leave, start等表示移动的动词，可用现在进行时来表示即将发生的动作。

　　3)"be about + 动词不定式"表示即将发生的动作。如：

　　The English evening is about to begin.英语晚会即将开始。

　　We are about to leave，so there is no time to visit him now.我们就要离开了，所以现在没有时间去看他。

　　4)"be + 动词不定式"表示安排或计划好了的动作等，(参看10.2的3)。如：

　　The boys are to go to school next week.这些男孩子下周要上学了。

　　He and I are to meet at the Shanghai Railway Station.他和我约定在上海火车站见面。

　　I'm to be home before midnight.我午夜前回家。