Most idiomatic expressions, include at least one preposition. It is important to learn and to use the correct preposition in an idiomatic expression. Because a different preposition can completely change the meaning of the expression.
For Examples :
Agree to a proposal, with a person, on a price, in principle.
E about a matter, with a person, for or against a proposition.
Correspond to a thing, with a person.
Differ from an unlike thing with a person.
Live at an address, in ahouse or city, on a street, with other person.