The house fell down

Paul:
Both are correct.
Which one you use depends on the context:

His house and many others on the hillside have fallen down because of the recent mud slides.
The house fell down in the earthquake a year ago.

PaultxWhich is correct: The house fell down or The house has fallen down?

Both.

1. The house fell down is definite, remote, historical.

2. The house has fallen down is indefinite, proximate, current.

1. is thought of as having happened at a definite time in the past, and conceptually separated fr

So, in the case I see a house falling down, and, after the fact ended, someone just passing by asks:

- What happened?

My correct answer will be:

- A house has fallen down.

Is it?

I ask it because I'm still in doubt, as your explanation considers past happenings, while I'm thinking of a present fact, I mean, "a house fell down" - like "a dog barked", "t

Either will work. The present perfect is probably the more expected.