Many statements not in "If . . ., then _ _ _" form can be expressed as conditional statements in standard "If . . ., then _ _ _" form.

"Socrates would not have remained alive if he had taken part in public affairs and had always maintained the cause of justice." (Cf. P 14b) = "If Socrates had taken part in public affairs and Socrates had always maintained the cause of justice, then Socrates would not have remained alive."

"Socrates should propose a penalty of imprisonment only if he deserves it." = "If Socrates does not deserve a penalty of imprisonment, then Socrates should not propose a penalty of imprisonment."