The original statement is P → B

Create the converse of it.
? P ~P B ~B ? → ↔ & or ? P ~P B ~B

Create the contrapositive of it.
? P ~P B ~B ? → ↔ & or ? P ~P B ~B

Create the inverse of it.
? P ~P B ~B ? → ↔ & or ? P ~P B ~B