it i there - małe pytanie

it seemed
there seemed
W jakich przypadkach używamy w zdaniu there a w jakich it?? bardzo bardzo prosze o pomoc

Krótko mówiąc:
there seemed (to be...) - wtedy, kiedy mozna użyć there is, czyli przed rzeczownikami
there seemed to be no other soultion = it seemed that there was no other solution
it seemed + that-clause lub przymiotnik
it seemed that he was OK
It seemed fine to me.