How to Say "i vow" in Spanish
The Spanish word for “i vow” is “prometo” — A1 level. This is a very common word in everyday Spanish.

Examples
Te prometo que llegaré a tiempo.
I promise you I will arrive on time.
Prometo estudiar más para el próximo examen.
I promise to study more for the next exam.
Si me ayudas, te prometo una recompensa.
If you help me, I promise you a reward.
Saying 'I promise to...'
After 'prometo', if you're promising to do something yourself, just add the base '-ar', '-er', or '-ir' form of the next verb. For example, 'Prometo llamar' (I promise to call).
Promising 'that' something will happen
To promise that something else will happen or that someone else will do something, use 'prometo que...'. For example, 'Te prometo que todo estará bien' (I promise you that everything will be okay).
Adding an extra 'a'
Mistake: “Prometo a llamar.”
Correction: Prometo llamar. Unlike some other verbs, 'prometer' connects directly to the next verb without needing a little word like 'a' in between.
Related Translations
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