Basic Conjunctions in Spanish

Overview

Conjunctions are the glue that holds sentences together. They connect words, phrases, and clauses, allowing you to express more complex ideas. At the CEFR A1 level, learning the basic Spanish conjunctions lets you move beyond simple one-idea sentences and start combining thoughts naturally -- saying things like "I speak Spanish and English" or "I study because I like it."

Spanish conjunctions are mostly straightforward, but they have a couple of distinctive features that English lacks. The most notable is that y (and) changes to e before words starting with the i sound, and o (or) changes to u before words starting with the o sound. These small phonetic adjustments make spoken Spanish flow more smoothly.

How It Works

Coordinating conjunctions

These connect elements of equal importance:

Spanish	English	Example
y	and	Pan y mantequilla. (Bread and butter.)
e	and (before i-/hi-)	Padre e hijo. (Father and son.)
o	or	¿Café o té? (Coffee or tea?)
u	or (before o-/ho-)	¿Siete u ocho? (Seven or eight?)
pero	but	Es caro, pero bueno. (It's expensive, but good.)
sino	but rather	No es rojo, sino azul. (It's not red, but rather blue.)

Causal and consequential conjunctions

Spanish	English	Example
porque	because	Estudio porque me gusta. (I study because I like it.)
así que	so, therefore	Llueve, así que me quedo. (It's raining, so I'm staying.)
por eso	that's why	Estoy cansado, por eso duermo. (I'm tired, that's why I sleep.)

Y → E rule

Use e instead of y when the next word begins with the sound i or hi:

Incorrect	Correct
español y inglés	español e inglés
padre y hijo	padre e hijo
geografía y historia	geografía e historia

Exception: y stays when the next word starts with hie-: nieve y hielo (snow and ice).

O → U rule

Use u instead of o when the next word begins with the sound o or ho:

Incorrect	Correct
siete o ocho	siete u ocho
ayer o hoy	ayer u hoy
mujeres o hombres	mujeres u hombres

Pero vs. sino

Both mean "but," but they are used differently:

Use	Conjunction	Example
Simple contrast	pero	Es difícil, pero interesante.
Correction after a negative	sino	No es azul, sino verde.
Correction + conjugated verb	sino que	No canta, sino que baila.

Sino is only used after a negative statement to replace one idea with another.

Examples in Context

Spanish	English	Note
Hablo español e inglés.	I speak Spanish and English.	e before i-
¿Quieres té o café?	Do you want tea or coffee?	choice
Es tarde, pero no estoy cansado.	It's late, but I'm not tired.	contrast
Estudio porque me gusta.	I study because I like it.	reason
No es caro sino barato.	It's not expensive but rather cheap.	correction
¿Siete u ocho personas?	Seven or eight people?	u before o-
Llueve, así que no salgo.	It's raining, so I'm not going out.	consequence
Como frutas y verduras.	I eat fruits and vegetables.	simple connection
No habla español, sino francés.	He doesn't speak Spanish, but rather French.	correction
Trabajo mucho, por eso estoy cansado.	I work a lot, that's why I'm tired.	consequence

Common Mistakes

Forgetting the Y → E change

• Wrong: Hablo español y inglés.
• Right: Hablo español e inglés.
• Why: Before words beginning with the i sound, y becomes e for smoother pronunciation.

Using pero instead of sino after negation

• Wrong: No es azul, pero verde.
• Right: No es azul, sino verde.
• Why: When you negate one thing and replace it with another, use sino. Pero is for simple contrasts where both parts can be true simultaneously.

Confusing porque (because) with por qué (why)

• Wrong: ¿Por que estudias? or Estudio por qué me gusta.
• Right: ¿Por qué estudias? (Why do you study?) / Estudio porque me gusta. (I study because I like it.)
• Why: Por qué (two words, accent) is for questions. Porque (one word, no accent) is for answers and explanations.

Practice Tips

• Combine simple sentences. Take two short sentences and join them with a conjunction: Estudio español + Me gusta = Estudio español porque me gusta. Start with y, pero, porque and gradually add sino, así que, por eso.

• Practice the sound changes. Make a list of common word pairs where y becomes e and o becomes u. Say them aloud until the phonetic switch becomes natural: padre e hijo, siete u ocho, español e inglés.

Related Concepts

• Next steps: Complex Sentence Structures -- Build longer sentences with subordinating conjunctions
• Next steps: Discourse Connectors -- Link ideas across sentences and paragraphs