"Dein Mantel ist lang."

Translation: Your coat is long.

[Chrispatte8]

Why dein and not deine?

[ethereal_dream]

I believe this is because it's "der Mantel", a masculine noun. You use dein for masculine/neutral nouns and deine for feminine nouns.

[quis_lib_duo]

Yes, see here: https://blogs.transparent.com/german/mein-dein-sein-ihr-etc-german-possessive-pronouns-in-the-nominative-case/

[Burgos69]

Thanks for sharing

[RegretfulExpert]

Der - dein
Die - deine
Das - dein
Die - deine

[vladutsss]

Mantel is masculin?!

[ghettosuperstar]

Sounds really like older English. Thine mantel is long

[Amelia2306]

I use jacket instead of coat and it was wrong but ive been using it on all the other statements and it has been correct. Also I said mucky instead of dirty and that was wrong

[jasmine959]

Can i use euer?

[vladutsss]

I think you could. As if the coat belongs to a group. But if you want to use formal you should use Ihr.

I am still learning; if i am wrong please correct me!

[Alex586180]

Couldn't this also be read as "my" coat is long? This form of Dein, how do you know its "your" vs "mine"