Simple, Compound, Complex, or Compound Complex Sentence? “Someone at the cake, and now we have no desert.”

“Before you sit down, please take off your coats so the usher can hang them in the closet.”

Is the underlined word a predicate nominative or a predicate adjective? could that animal have been an alligator or a *crocodile*? a. predicate adjective b. predicate nominative crocodile is the underlined word.