How can you start playing games so soon,Tom?I  have finished  my homework,Mom

问题描述:

How can you start playing games so soon,Tom?I  have finished  my homework,Mom
为什么用现在完成时?

现在完成时表示到说话的时间为止动作已经完成,并对现在造成影响.Mom 问Tom 怎么这么快就开始玩儿游戏了,Tom说我已经完成家庭作业了,所有就可以玩游戏了.