How to Say "will need" in Spanish
The Spanish word for “will need” is “necesitará” — A2 level. This is a very common word in everyday Spanish.

Examples
Ella necesitará más tiempo para terminar el proyecto.
She will need more time to finish the project.
Usted necesitará su pasaporte para viajar.
You (formal) will need your passport to travel.
El coche necesitará aceite nuevo pronto.
The car will need new oil soon.
Future Tense Formation
The Spanish future tense is easy! You take the full base verb (necesitar) and add the future ending (-á). This form is used for 'he,' 'she,' or the formal 'you' (usted).
No 'Will' Required
In English, you say 'will need.' In Spanish, the 'will' is already built into the verb form 'necesitará,' so you don't add another word.
Using 'a' after the verb
Mistake: “Necesitará a comprar.”
Correction: Necesitará comprar. (The verb 'necesitar' does not need the preposition 'a' before another verb.)
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