already (happening rather early, continuing rather long) / previously, before (at some time in the past; but not: before a certain event) / expresses that an action has been completed; already (but more frequent); yet (in questions) / expresses a weighing of arguments, contrast between two statements, partial agreement, concession; admittedly; sure(ly); definitely; indeed / really (as an intensifier)
schon
already (happening rather early, continuing rather long) / previously, before (at some time in the past; but not: before a certain event) / expresses that an action has been completed; already (but more frequent); yet (in questions) / expresses a weighing of arguments, contrast between two statements, partial agreement, concession; admittedly; sure(ly); definitely; indeed / really (as an intensifier)