French Phrase
Ajuste la température si besoin.
Meaning
This sentence tells someone to change the temperature when it becomes necessary. It is a concise, instructional command often heard in homes, labs, or kitchens where a thermostat or heat source can be manually altered.
When to use
Use it in informal spoken French or in written instructions where a friendly, direct tone is appropriate – for example, when speaking to a roommate, a colleague, or in a user manual for a device.
✦Grammar Breakdown
Ajustelatempératuresibesoin
Imperative (tu)
‘Ajuste’ is the second‑person singular informal imperative of the verb ‘ajuster’, used to give a direct command.
Definite article
‘la’ agrees with the feminine noun ‘température’ and marks it as a specific thing being adjusted.
Elliptical expression ‘si besoin’
‘si besoin’ is a shortened form of ‘si besoin est’, meaning ‘if (it) is needed’; it is common in instructions.
🗨In Conversation
Ajuste la température si besoin.
Adjust the temperature if needed.
D'accord, je la baisse de deux degrés.
Okay, I’ll lower it by two degrees.
✕Common Mistakes
Ajustez la température si besoin.
‘Ajustez’ is the formal imperative; use it only with strangers or in formal contexts. For informal speech, ‘Ajuste’ is correct.
Ajuste la température si le besoin.
The idiomatic expression is ‘si besoin’, not ‘si le besoin’. Adding the article makes the phrase sound unnatural.
Ajuste la température si besoin est.
While ‘si besoin est’ is grammatically correct, it is rarely used in everyday speech; the shortened ‘si besoin’ is preferred.
↔Alternatives
Régule la température si nécessaire.
Regulate the temperature if necessary.
Modifie la température si besoin.
Modify the temperature if needed.
Change la température si c’est nécessaire.
Change the temperature if it’s necessary.
Cultural Tip
French speakers often prefer short, efficient instructions. ‘Si besoin’ is a formal‑sounding but widely accepted phrase that avoids the longer ‘si cela est nécessaire’. In casual conversation you might also hear ‘si tu veux’ (if you want) or ‘au besoin’ (if needed). Choose the informal imperative ‘Ajuste’ only with people you know well; with strangers or in professional settings use the formal ‘Ajustez’.