Latin tenses in commands (semantics)

Imperative clauses represent actions to be carried out (read more on Imperative mood). While indicated events are placed in a timeline relative to the speech act (past, present, future), imperated actions do not vary for a primary tense: i.e. imperated actions can be carried out only after the speech act (future). However, a task can be placed in a temporal circumstance relative to another event -- after, while or before that event -- which means imperative clauses may have a secondary tense.