-shou/-masu/-shimasu then followed by Desu
Is it okay or bad to put desu after the masu form of verb? Like tabemasu desu.

Question

Answer

It is bad way to use.
Maybe sometimes you can see that way in speaking situation, 
it must be a kind of joke or so on.

Answer

it's a wrong use of 'desu'

when you have a verb finished in ~masu/~mashou you can't add desu.

desu is an auxiliar so you don't put it after a masu/mashou becouse it's already a complete sentence

however you can use in other verbal constructions, ex tabetai desu (i want to eat), but it changes the meaning of the expression as you can see

good luck!

Answer

Yes, it is bad.

Answer

Thanks 4 answering guys!