将来进行时
HOW
HOW
will / shall do
to express the simple future tense
will/shall do
be going to do
be to do
be about to do
be doing
1.When they arrive at the airport , I   
will be waiting for them.
2.He will be working in the garden at 2:30    tomorrow afternoon.
将来进行时使用方法之一：表达在将来某一时刻或某一时间段正在进行旳动作．
will/ shall+be+doing