bang的用法及例句？

1)A sudden loud noise, as of an explosion.
2)巨响突发的巨响，如爆炸声
3)A sudden loud blow or bump.
4)砰然作响发出砰一声的猛击或猛撞
【非正式用语】
5)A sudden burst of action:
6)突然开始进行：

例句：There was a bang as the gun was fired.
The door shut with a bang after the angry man.
The lights went out bang in the middle of the performance.

参考资料：来源于《金山词霸2003》

例如:She heard someone bang at the door.
她听见有人猛敲门。

那么你的句子应是:I hear(注意更换你所须的时态) someone bang behind me.

就是一个声音词阿！