Is It the Rain or a Train?

I hear a sound outside my window. Is it the rain

or is it a train? Is a storm about to begin or is a

burglar trying to get in or maybe Is it the rain

or is it a train? It rained only yesterday, but the train

comes through every day then it's gone. So is it the rain

or is it a train? Maybe soon I'll hear the sound of thunder.

Is it the rain or is it a train? How long can

the train go on or the Rainfall until it's gone or maybe.