1. ∀x(R(x) →H(x)) All rabbit hops.
2. ∀x(R(x)∧H(x)) All animals are hopping rabbits.
3. ∃x(R(x)→H(x)) There exists an animal that, if it is a rabbit then it hops.
4. ∃x(R(x)∧H(x)) Some rabbits hop.
Another way: "There exists an animal that is a rabbit and hop. "