"Ten kot jest złym kotem."

Translation: This cat is a bad cat.

[Bob20020]

Grumpy cat?

[tryingveryhard]

rip

[lisettelac2]

No cat is bad its just the humans are inferior

[amnae]

Why 'złym'?

[mihxal]

Both the noun and adjective describing it should be used in Instrumental.

[jjknyc]

a redundant sentence if I ever heard one....

[Ilyicz]

Does "zły" also mean "evil"? This is what "zloj" means in Russian.

[alisa488338]

right!

[Tim5602]

Isn't 'this cat is a bad one' a better translation as 'this cat is a bad cat'?

[Wippii]

Anyone else always translate 'zły' as "evil" when it's referring to a person/animal?

"Bad" is a lame word when "evil" can be used instead. :P

[Popo-lsku]

Yeah... You can say, it´s a bad joke or a bad day or maybe a bad movie, but a "bad cat"!? Do you know the "Bad man" from Gotham City!? :D

[chce_polski]

What an awful thing to say.

[alisa488338]

Wasz przykład tłumacze się: Ten kot to nie dobry kot. Więc tu powinno być "the angry cat".

[Jellei]

Sorry what? Dlaczego? "zły kot" to niewątpliwie może być po prostu "bad cat".

[HarryCox896374]

Why does Kot change to Kotem?

[Jellei]

In an "X is Y" sentence, when both X and Y are nouns, Y takes the Instrumental case, which here is "kotem".

More info here: https://forum.duolingo.com/comment/16373167