The first and easiest of the nonstandard cases to translate
occurs when the consequent is stated first, and the antecedent
I'll stay home tomorrow if I still feel sick.
The component proposition, "I still feel sick" is the antecedent,
even though it comes second, because it is the "if" component.
Thus, in standard form: "If I still feel sick, then I will stay
In general, "p if q" should be translated as, "If q, then p."