Here's a breakdown:
* Descriptive statements: These describe the world as it is. They are factual and objective. Example: "The sky is blue."
* Normative statements: These express value judgments or beliefs about what should be. They involve ideas of right and wrong, good and bad, or what is considered acceptable or desirable. Example: "People should be kind to each other."
Tense in grammar refers to the time of an action or event (past, present, future).
Therefore, "normative" doesn't have a tense. It's a concept that applies to statements, not grammatical structure.
However, normative statements can be expressed in different tenses:
* Present tense: "It is wrong to steal."
* Past tense: "It was considered rude to interrupt."
* Future tense: "People will need to learn to live sustainably in the future."
It's important to note that the tense used in a statement doesn't change its underlying normative nature.