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I didn’t fall in love with sentence structure in Spanish. I fell in love with it in English first.

It was prepositional phrases that did it — seeing how a short chunk of words could anchor meaning in a sentence, show relationship, give context. Then homeschooling my kids, we started parsing and diagramming sentences together. And something clicked that I hadn’t expected: when you can see how a sentence is built, you can unlock what it means. Every time.

That same analysis works in Spanish — maybe even better, because Spanish sentence structure is so consistent once you understand the building blocks. Those building blocks are called the parts of speech.

And once you know what each one does, Spanish sentences stop looking messy and start looking like something you can actually read.

In Spanish the parts of speech are called las partes de la oración — and there are eight of them.

What Is a Part of Speech?

A part of speech is a label that tells you the function of a word in a sentence. Instead of memorizing rules, you learn to identify what each word is doing.

Once you can label the parts, you can read a sentence like a map — you know where the action is, who’s doing it, what’s being described, and how everything connects. That’s not grammar for grammar’s sake. That’s a tool for understanding real Spanish.

What are the parts of speech in Spanish?

In Spanish: Las ocho partes de la oración son el sustantivo, el adjetivo, el pronombre, el verbo, el adverbio, la preposición, la conjunción, y la interjección.

Now, let’s walk through each of the eight parts of speech in Spanish, with examples and simple diagrams to help you visualize how they work.

1. Nouns (Sustantivos)

Nouns name people, places, things, and ideas. They’re the main characters of most sentences — the things being talked about, acted on, or described.

What is the definition of a noun in Spanish?

In Spanish a noun is el sustantivo – es una persona, un lugar, una cosa o una idea.

Examples:

• casa — house
• libro — book
• mamá — mom
• comida — food

Sentence Example:
La casa es grande. — The house is big.

Sentence Diagram:

   casa
 /       \
es     grande

Spanish nouns also carry gender (masculine or feminine) and number (singular or plural) — which affects the articles and adjectives around them.

If you’re just starting, focus on recognizing nouns first. The subcategories will make more sense as you keep learning.

Digging Deeper into Nouns

Nouns do specific jobs inside a sentence — acting as the subject, the direct object, or the object of a preposition. In simple terms, they’re the people, places, and things your sentences are built around.

They can also be categorized by type: common nouns, proper nouns, collective nouns, and compound nouns. Each category has its own patterns worth learning over time — but none of them need to be mastered before you start using Spanish in real sentences.

Once you can spot nouns, you’ll want to know the shortcut that keeps you from repeating them over and over. That’s where pronouns come in.

2. Pronouns (Pronombres)

Pronouns replace nouns so you don’t repeat the same word over and over. They’re the shortcut words — the ones that let sentences flow naturally without constant repetition.

In Spanish a pronoun is el pronombre.

What is the definition of a pronoun in Spanish?

In Spanish: un pronombre sustituye un sustantivo para evitar la repetición.

Common pronouns:

• yo — I
• tú — you
• él/ella — he/she
• nosotros — we
• ellos — they
• lo, la, me, te — object pronouns

Sentence Example:
Yo la veo. — I see it/her.

Él lo quiere.
He wants it.

Mini Diagram:

Yo 
  \
   veo
      \
       la

Some people get confused with this part of speech because there are so many of these little words.

There are several subcategories of pronouns: personal pronouns, demonstrative pronouns, possessive pronouns. object pronouns, reflexive pronouns, relative pronouns, and more. See the complete list of Spanish pronouns.

Pronouns help us avoid repetition — but to describe nouns, we need adjectives.

3. Adjectives (Adjetivos)

Adjectives describe nouns. They tell you what kind, which one, how many, or whose. In Spanish adjectives usually come after the noun — which is the opposite of English and worth paying attention to from the beginning.

In Spanish adjective is el adjetivo.

What is the definition of an adjective in Spanish?

In Spanish: Un adjetivo describe un sustantivo o pronombre.

Examples:

• casa bonita — pretty house
• perro blanco — white dog

Sentence Example:
El perro blanco corre. — The white dog runs.

El perro blanco corre.
The flower is beautiful.

Isn’t that a great way to see the difference using the color-coded tags?

Mini Diagram:

            perro
          /    |     \
        El   blanco   corre

Spanish adjectives must match the noun in gender and number. This is called gender-number agreement.

About Articles / The “Ninth” Part of Speech

A note on articles: Some teachers consider articles (el, la, los, las) a subcategory of adjectives. Others treat them as a ninth part of speech. Either way — learn a noun together with its article from the beginning. La mesa. El gato. It saves a lot of confusion later.

Adjectives help you describe nouns, but to show what those nouns do, you need verbs. Let’s look at how Spanish verbs work.

4. Verbs (Verbos)

Verbs express actions, states, or conditions. They tell you what the subject is doing — and in Spanish, a single verb can carry that information without any helper words.

In Spanish, verb is el verbo.

What is the definition of a verb in Spanish?

In Spanish: Un verbo expresa una acción o estado de ser.

Examples:

• hablar — to speak
• comer — to eat
• vivir — to live

Sentence Example:
Ella vive aquí. — She lives here.

Shakira baila con ritmo.
Shakira dances with rhythm.

La sombra es oscuro.
The shadow is dark.

Mini Diagram:

       Ella
          \
          vive
             \
             aquí

Verbs are the engine of every Spanish sentence. In fact a verb can make a complete sentence in Spanish on its own — ¡Corre! (Run!) is a full sentence.

There’s a lot to explore within verbs — conjugation, tenses, regular and irregular forms, reflexive verbs, stem-changing verbs, and more. Each of these has its own post.

But how do we describe how an action happens? That’s where adverbs come in.

5. Adverbs (Adverbios)

Adverbs describe verbs, adjectives, and even other adverbs. They explain how, when, where, or how often something happens.

In Spanish, an adverb is el adverbio.

What is the definition of adverb in Spanish?

In Spanish: Un adverbio modifica un verbo, un adjectivo, o otro adverbio.

Examples:

• rápido — quickly
• hoy — today
• aquí — here

Sentence Example:
Ella corre rápido. — She runs quickly.

El joven corre furiosamente.
The teen runs furiously.

El batido es muy espeso.
The smoothie is very thick.

Mini Diagram:

        Ella
           \
           corre
               \
               rápido

Adverbs add precision — they’re the words that tell you not just what’s happening but how, when, and where it’s happening.

Now it’s time for the connectors that glue the sentence together.

6. Prepositions (Preposiciones)

Prepositions show relationships of time, place, direction, or purpose. They usually appear in short chunks — a, en, para, con, por, sobre — and connect a noun or pronoun to the rest of the sentence.

In Spanish, a preposition is la preposición.

What is the definition of a preposition in Spanish?

In Spanish: Una preposición relaciona un sustantivo o pronombre con otra palabra.

Let’s look at some examples of prepositions in action.

Examples:

• en la casa — in the house
• con amigos — with friends

Sentence Example:
Vivo en México. — I live in Mexico.

Voy a la piscina. La pelota es hecho de goma. Pasé por tu casa.
I’m going to the pool. The ball is made of rubber. I passed by your house.

Mini Diagram:

        Vivo
          \
          en
            \
           México

Prepositions were the part of speech that first made sentence structure click for me in English — and they do the same work in Spanish. Once you can spot them, sentences open up.

See the list of the 22 prepositions.

Once you can express relationships, you can connect full ideas using conjunctions.

7. Conjunctions (Conjunciones)

Conjunctions connect words, phrases, and sentences. They’re the glue that holds ideas together and lets you build more complex thoughts.

In Spanish, a conjunction is la conjunción.

What is the definition of a conjunction in Spanish?

In Spanish: Una conjunción une cosas.

Common conjunctions you’ll see often:

• y — and
• pero — but
• o — or
• porque — because

Sentence Example:
Estudio español y leo libros. — I study Spanish and read books.

Mini Diagram:

Estudio    leo
   \       /
     español
          \
            y

There are two main types — coordinating conjunctions connect equal elements, and subordinating conjunctions link main and dependent clauses. Both are worth learning deliberately because they’re what make sentences flow naturally.

Finally, let’s look at the part of speech that expresses emotion, reaction, or sudden feeling.

8. Interjections (Interjecciones)

Interjections express emotion, surprise, or reaction. They often appear in conversation and add personality to real spoken Spanish.

In Spanish, an interjection is la interjección.

What is the definition of an interjection in Spanish?

In Spanish: Una interjección es una palabra o frase que muestra fuerte emoción.

Examples:

• ¡Ay! — Ouch!
• ¡Oye! — Hey!
• ¡Guau! — Wow!

Sentence Example:
¡Ay! Me duele. — Ouch! It hurts.

¡Guau!
Wow!

Interjections stand alone — they don’t connect grammatically to the rest of the sentence the way the other parts of speech do. But they’re everywhere in real conversation, and recognizing them makes natural Spanish feel a lot more readable.

Now that you know all eight parts of speech, let’s bring everything together visually.

How Sentence Diagramming Makes It All Click

This is the part I love most — and the reason I started diagramming sentences with my kids in the first place.

Sentence diagramming takes a sentence and maps it visually — showing you which words work together, what role each one plays, and how the whole thing fits together. Instead of memorizing long explanations, you see the pattern.

Why it works for Spanish:

• It shows you which words work together
• It reveals sentence patterns instantly
• It helps you understand word order
• It makes grammar feel like a puzzle instead of a rulebook

Example:

La niña pequeña lee un libro interesante. – The little girl reads an interesting book.

Simple Diagram:

                   lee
               /          \
         niña              libro
        /    \          /         \
      La   pequeña    un     interesante

From one diagram you can identify the noun, the adjectives, the verb, the object — and see exactly how Spanish word order works. That’s the power of visual grammar.

How Sentence Tags Makes It Click

Another approach is color-coded tagging — labeling each word in a sentence by part of speech using different colors. It’s particularly useful for spotting patterns like articles, adjective placement, verb tenses, and prepositional phrases in real sentences.

Tagging Example:

¡Ojo! El hombre perdió todo porque era muy tonto en sus amistades.

In English: Watch out! The man lost everything because he was foolish in his friendships.

Those are two ways to make sentence building visual.

Closing Thoughts

The parts of speech aren’t just grammar terminology. They’re a way of seeing — of looking at a Spanish sentence and understanding what every word is doing and why it’s there.

Once you have that lens, Spanish stops looking like a wall of unfamiliar words. It starts looking like a system. And systems make sense once you know how to read them.

Start with the parts of speech you encounter most — nouns, verbs, adjectives. Build from there. The more you practice identifying them in real sentences, the more natural Spanish becomes.

Ready to Stop Freezing When It’s Time to Build a Sentence?

The Instant Grammar Kit gives you the system to actually put Spanish together — so you can say what you mean in real conversations, not just recognize the rules on paper.

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Keep Going →

→ Spanish Verbs Explained with Clear Examples — the most important part of speech in Spanish and how to start using them right away → Spanish Nouns Explained with Clear Examples — how gender and number work and why learning nouns with their articles matters → Spanish Grammar: Complete Beginner Guide — the full picture of how Spanish grammar fits together