Adjective agreement in Spanish : complete course

What Is Adjective Agreement in Spanish?

In Spanish, adjectives must agree with the noun they describe. This means the adjective changes its ending depending on the gender and number of the noun. It is one of the most fundamental rules of Spanish grammar.

For example, if a noun is feminine and plural, the adjective must also be feminine and plural. This is very different from English, where adjectives never change.

Simple Examples to Get Started

• Un chico alto — A tall boy
• Una chica alta — A tall girl
• Unos chicos altos — Tall boys
• Unas chicas altas — Tall girls

Notice how the adjective alto changes to alta, altos, or altas depending on the noun. This is adjective agreement in action.

The Key Elements of Adjective Agreement in Spanish

To understand adjective agreement, you need to know two things: gender and number. Let us look at each one.

1. Gender Agreement

In Spanish, every noun is either masculine or feminine. The adjective must match this gender.

• Masculine nouns usually take adjectives ending in -o: El libro rojo (The red book)
• Feminine nouns usually take adjectives ending in -a: La manzana roja (The red apple)

Some adjectives end in -e or a consonant. These do not change for gender:

• El chico inteligente — The intelligent boy
• La chica inteligente — The intelligent girl
• El examen difícil — The difficult exam
• La lección difícil — The difficult lesson

2. Number Agreement

Adjectives must also match the number of the noun: singular or plural.

• To make most adjectives plural, add -s after a vowel: alto → altos
• Add -es after a consonant: difícil → difíciles

3. Position of the Adjective

In Spanish, adjectives usually come after the noun, not before it. This is the opposite of English.

• Un coche rojo — A red car (literally: a car red)
• Una casa bonita — A pretty house (literally: a house pretty)

Some common adjectives like bueno (good) or grande (big) can come before the noun, but this is a more advanced topic.

Why Adjective Agreement Matters

You might wonder: does it really matter if I get the ending wrong? In Spanish, yes — it does. Using the wrong ending can make your sentence sound unnatural or even confusing to native speakers.

More importantly, learning adjective agreement early helps you build strong habits. Once you understand the pattern, it becomes automatic. It also helps you understand everything you read and hear in Spanish more clearly.

Think of it as a key that unlocks a big part of Spanish grammar. Many other rules follow the same logic of gender and number agreement.

Comparison with Other Languages

It can help to compare Spanish adjective agreement with English and French.

If you speak French, Spanish adjective agreement will feel familiar. If your native language is English, this concept is new — but do not worry, the rules are very regular and easy to learn with practice.

A Complete Example

Let us look at a short paragraph using adjective agreement correctly:

Mi hermana es alta y delgada. Tiene el pelo largo y rubio. Lleva una falda azul y unos zapatos negros.

Translation: My sister is tall and slim. She has long, blonde hair. She is wearing a blue skirt and black shoes.

• alta — feminine singular, agrees with hermana (sister)
• delgada — feminine singular, agrees with hermana
• largo — masculine singular, agrees with pelo (hair)
• rubio — masculine singular, agrees with pelo
• azul — no change for gender (ends in consonant), singular
• negros — masculine plural, agrees with zapatos (shoes)

Key Points to Remember

• Spanish adjectives must agree with the noun in gender (masculine/feminine) and number (singular/plural).
• Adjectives ending in -o change to -a for feminine nouns.
• Adjectives ending in -e or a consonant do not change for gender.
• Add -s or -es to make an adjective plural.
• In Spanish, adjectives usually come after the noun.
• Regular practice makes these rules feel natural over time.

Sources

• Real Academia Española. Nueva gramática de la lengua española. Espasa, 2009.
• Butt, John and Benjamin, Carmen. A New Reference Grammar of Modern Spanish. Routledge, 2011.
• Whitley, M. Stanley and González, Luis. Gramática para la composición. Georgetown University Press, 2007.