英语中现在完成时与现在完成进行时的区别

现在完成时用于过去发生并对现在造成影响的情况。例如
The battery has been charged.
I have never watched such a terrible film.
现在完成进行时用于从过去一直延续到现在并仍将继续延续的动作或状态。例如
I have been waiting for two hours.