Buna ziua. Care este diferenta dintre verb la Indicativ, perfect compus si verb la Participiu ? Cu exemple in propozitii daca s-ar putea. Multumesc!

1one sharp difficulty presented itself. in the intervening twenty-five years my name had become reasonably well known.2 this being so, my trip demanded that i leave my name and my identity at home.3 i had to go alone and i had to be self-contained, a kind of casual turtle carrying his house on his back.4 with all this in mind i wrote to the head office of a great corporation which manufactures trucks.