现在进行时表示将来,一般是有计划要发生的,或某些迹象表明一定会发生的.比方说we're setting off.我们要出发了（计划好的）
it's going to rain.（乌云密布,要下雨了）
一般现在时表将来比较少,一般是四种情况
1 下列动词：come,go,arrive,leave,start,begin,return的一般现在时表将来.这主要用来表示在时间上已确定或安排好的事情.
The train leaves at six tomorrow morning.
When does the bus star?It stars in ten minutes.
2 倒装句,表示动作正在进行,如：
Here comes the bus.= The bus is coming.
There goes the bell.= The bell is ringing.
3 在时间或条件句中.
When Bill comes (不是will come),ask him to wait for me.
I'll write to you as soon as I arrive there.
4 在表祈愿的动词hope,wish,take care that,make sure that等后.
I hope they have a nice time next week.
Make sure that the windows are closed before you leave the room.