How do you say past and future tense of last Monday in french?

Here's how you say "last Monday" in French, along with the past and future tenses:

Past Tense:

* "Lundi dernier" - This is the most common and natural way to say "last Monday".

Future Tense:

* "Lundi prochain" - This translates to "next Monday". There's no direct equivalent to "last Monday" in the future tense in French. You would need to specify a future date, like "Lundi 15 mai" (Monday, May 15th) or "Le lundi de la semaine prochaine" (Monday of next week).

Example:

* "J'ai terminé mon projet lundi dernier." (I finished my project last Monday.)

* "Je vais commencer mon nouveau travail lundi prochain." (I'm starting my new job next Monday.)

Let me know if you have any other French language questions!