French language Q&A Forum

I am not an astronomer but I believe the correct term for describing earth's movement around the sun is not "rotation" but "revolution."  I think it would be correct to say,

"...en fait, la révolution de la Terre autour du Soleil dure quelques heures de plus chaque année."

Bonjour. Don’t know if links are OK, but on this page it says that l’automne is less frequent than l’été or l’hiver. Is this true or is l’automne just as common? See point 3 at this link.

Link: https://www.frenchanted.com/seasons-in-french-pick-the-right-preposition/

Should you say il est derrière la maison or il est en arrière de la maison or il est arrière la maison.

As I know we use "en" to replace a noun that follows number/quantity such as un(e), deux, un peu de etc.. so in this case it means that I can use "en" to replace ANY noun including "idée, histoire, conseil, chance" etc but only with any indefinite article, right? And in examples like "je vais vous donner une idee" "il raconte une histoire à mon ami" these nouns can be also replaced with "en", right? or not? why? I passed several tests where these nouns were replaced with COD(le,la,les) and I really can't understand why.. can someone explain it to me, please?

Second sentence, 'dormi' sounds like 'dorni' - that is, no 'm' sound.  Third sentence, 'et il a' sounds like 'et la' - that is, no 'il' sound.