It's easier to compare with English da = from / to (just in one case, with verb "andare" and the complement is not a place) / as or for / by Vengo da Roma = I come from Rome Camicia da uomo = men's shirt (shirt for men) Vado da un amico = I go to a friend of mine Il topo è stato mangiato dal gatto = The mouse has been eaten by the cat per = for / through Cammino per la città = I walk through the city Questo è per te = this is for you a = to / in Vado a Roma = I go to Rome Vivo a Roma = I live in Rome Lo dico a te = I say that to you di = of / about the wheel of the car = la ruota dell'automobile un libro di storia = a book about history tra (fra) = between In questa foto sono tra mio fratello e mia sorella = in this photo I'm between my brother and my sister con = with / to Vado al parco con lui = I go to the park with him Parlo con te = I'm talking to you This is just a short explanation, here you can find more examples: http://www.italica.rai.it/principali/lingua/grammar/topics/preposizioni.htm http://grammatica-italiana.dossier.net/grammatica-italiana-13.htm

/tra/ and /fra/ are 100 % equivalent, both in meaning and in usual contexts.

it's a big question because in italian you can use this prepositions in many situations but always with the same meaning. In English exist different words to explain these many situations. ( for example: you can translate the italian preposition DI with the english words OF or TO, but the proper use of them depends on the context). Anyway I give you some common examples that might help you Io vengo DA Roma (I come FROM Rome) PER me è giusto (FOR me it's correct) A Roma (IN Rome) Questa casa è piena DI ragni (this house is full OF spiders) Non c'è niente TRA/FRA di noi (there is nothing BETWEEN us)

That would be very kind of you. One at a time then.

I could help you with a question that does not comprehend so many subjects! Several pages would be needed to give an answer to your many questions. What about proposing us one at a time, so you will also have the time to learn ...