The right way to conjugate the verb " a trebui " IInd person singular : tu trebuie. "Tu trebui" - is grammatically inccorect

Dear Heesob, Romanian grammar is full of exceptions and this is one of them. The verb A TREBUI is an unipersonal verb, so ..... EU TREBUIE, TU TREBUIE, EL TREBUIE, NOI TREBUIE, VOI TREBUIE, EI TREBUIE. This is a common mistake made by most Romanian people. :)