am/is/are/going to + do和will/shall + do
1) shall用于第三人称单数,常被will 所代替,二者都可以缩写成'll。
will 在陈述句中用于各人称,在征求意见时常用于第二人称。
Which paragraph shall I read first.
Will you be at home at seven this evening?
2) be going to +动词原形地点,表示将来。
a. 主语的意图,即将做某事。
What are you going to do tomorrow?
b. 计划,安排要发生的事。
The play is going to be produced next month。