将来进行时由will/shall be 现在分词构成。
1.表示将来某时刻正在进行的动作，用法与一般将来时没有多大差别，只是要有表示将来时间的状语或上下文。
At eight tomorrow we shall be waiting for you in the office.
What will you be doing this time the day after tomorrow?
2.表示对现在情况的估计
He will be just going to work now.
It's raining, he won't be playing football.
3.表示计划安排势必要发生的事，与一般将来时相比语气更婉转
We will be needing more and more computers.
In this lesson, we shall be discussing something important.
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