My teacher told me about prepositional cases for nouns and pronouns, and that if a pronoun is preceded by a preposition, then it takes prepositional case. However, in cases such as у тебя есть...
why is тебя
not taking the prepositional case of тебе
?
I do want to point out that I am very new to this language so please do try to explain it in as simple words as possible. Thanks!