ni ... nivso ... o
/nee ... nee/
/oh ... oh/
💡 Quick Rule
Use 'ni...ni' to reject both options ('neither...nor'). Use 'o...o' to choose between options ('either...or').
Think: Ni = No to both. O = Options are open.
- If 'ni...ni' comes after the verb, you need a 'no' before the verb (e.g., 'No quiero ni café ni té'). This double negative is correct in Spanish!
📊 Comparison Table
| Context | ni ... ni | o ... o | Why? |
|---|---|---|---|
| Ordering a drink | No quiero ni café ni té. | Quiero o café o té. | Rejecting both options vs. asking for a choice between them. |
| Weekend plans | No voy ni al cine ni al parque. | Voy o al cine o al parque. | 'Ni...ni' states what you won't do. 'O...o' states your possible plans. |
| Describing a meal | La comida no estaba ni fría ni caliente. | No sé si la comida estaba o fría o caliente. | Stating it was neither temperature vs. expressing uncertainty between the two. |
✅ When to Use "ni ... ni" / o ... o
ni ... ni
Neither ... nor. Used to negate or reject two or more options in a list.
/nee ... nee/
Rejecting two nouns
Ni el perro ni el gato quieren salir.
Neither the dog nor the cat wants to go out.
Rejecting two verbs
Hoy no pienso ni trabajar ni estudiar.
Today I plan neither to work nor to study.
Rejecting two qualities
La película no fue ni interesante ni divertida.
The movie was neither interesting nor fun.
o ... o
Either ... or. Used to present two or more choices or alternatives.
/oh ... oh/
Offering a choice of nouns
Puedes elegir o el perro o el gato.
You can choose either the dog or the cat.
Offering a choice of actions
Hoy podemos o trabajar o estudiar.
Today we can either work or study.
Presenting alternative qualities
La película es o muy interesante o muy divertida.
The movie is either very interesting or very fun.
🔄 Contrast Examples
With "ni ... ni":
No quiero ni café ni té, gracias.
I want neither coffee nor tea, thank you.
With "o ... o":
Puedo tomar o café o té, ¿qué recomiendas?
I can have either coffee or tea, what do you recommend?
The Difference: 'Ni...ni' closes the door on both options. 'O...o' opens the door to a choice between them.
With "ni ... ni":
Carlos no es ni alto ni bajo.
Carlos is neither tall nor short. (He's average height.)
With "o ... o":
No recuerdo si Carlos es o alto o bajo.
I don't remember if Carlos is either tall or short.
The Difference: 'Ni...ni' is used to state a fact that someone fits in the middle. 'O...o' is often used to express uncertainty between two possibilities.
🎨 Visual Comparison
Split-screen showing 'ni...ni' (rejecting options) vs 'o...o' (choosing between options).
'Ni...ni' says NO to everything. 'O...o' asks WHICH ONE?
⚠️ Common Mistakes
Quiero ni pizza ni pasta.
No quiero ni pizza ni pasta.
When the 'ni...ni' part comes after the verb, you must put 'no' before the verb. Spanish loves this kind of double negative!
No me gusta ni la pizza o la pasta.
No me gusta ni la pizza ni la pasta.
You can't mix them. If you start with 'ni' to negate something, you must continue with 'ni' for the other items in the negative list.
No tengo ni tiempo o dinero.
No tengo ni tiempo ni dinero.
Remember to be consistent. When listing things you don't have, use 'ni' for each item in the list.
📚 Related Grammar
Want to understand the grammar behind this pair? Explore these lessons for a deep dive:
🏷️ Key Words
✏️ Quick Practice
Quick Quiz: Ni ... ni vs O ... o
Question 1 of 3
Which sentence means 'I don't like either dogs or cats'?
🏷️ Tags
Frequently Asked Questions
Why do I need 'no' at the beginning of 'No quiero ni café ni té'?
Because in Spanish, double negatives are not only allowed, but often required! If the negative word ('ni') comes after the verb ('quiero'), you must put 'no' before the verb to 'activate' the negativity for the whole sentence. It feels strange for English speakers, but it's a fundamental rule in Spanish.
Can I use 'ni' for more than two things?
Absolutely! You can use it to negate a whole list. For example: 'No comí ni la entrada, ni el plato principal, ni el postre.' (I ate neither the appetizer, nor the main course, nor the dessert.)
What's the difference between 'o' and 'u'?
They both mean 'or', but you use 'u' instead of 'o' when the word that follows starts with an 'o-' or 'ho-' sound. This is purely for pronunciation, to avoid the two 'o' sounds running together. For example: 'Siete u ocho' (Seven or eight), 'Mujer u hombre' (Woman or man).