1．构成：shall / will + 动词原形
2．功能：
（1）表示将要发生的动作或存在的状态。
He will graduate from the college next year.
We shall finish our work as quickly as possible.
（2）将来时的其它结构：
I. be going to do something.
打算做某事。 （美国口语中常读作be gonna）
I'm going to buy a new coat this fall.
[be going to与will的对比：下列情况须用will ]
I'll be sixteen years old next year.
It will be the 20th of August tomorrow.
When he comes, I will give him your message.
II. be + to do sth.
表示计划安排做某事或用来征求意见。
Am I to take over his work?
We are to meet at the gate.
III. be about to do sth.
即将做某事。
The talk is about to begin.
重点补充：
be on the point of doing sth.
正要做某事
set out to do sth.
着手做某事
set about doing sth.
开始做某事
