* "Descendre": This is the most common and general way to say "go downstairs". It literally means "to descend". You can use it in most situations.
* Example: "Descends les escaliers, s'il te plaît." (Go downstairs, please.)
* "Monter": This translates to "go up" or "climb". It's used to specifically indicate going downstairs from an upper level.
* Example: "Monte d'un étage." (Go down one floor.)
* "Aller en bas": This literally translates to "go down". It's a more informal way to say "go downstairs".
* Example: "Aller en bas chercher la pizza." (Go downstairs to get the pizza.)
The best way to choose which phrase to use depends on the specific situation and your level of formality.