What Are Parts of Speech?

Words do different kinds of jobs in a sentence.

Compare:

The dog runs quickly.

Here, dog, runs, and quickly contribute in different ways. Traditional grammar groups words with similar grammatical behavior into categories called parts of speech or word classes.

English commonly distinguishes categories such as nouns, verbs, adjectives, adverbs, pronouns, prepositions, determiners, and conjunctions.

One important detail: these categories describe how words behave grammatically, not simply what they mean.

For example:

run can be a verb:

I run every morning.

But it can also be a noun:

I went for a run.

Similarly, fast can be an adjective in a fast car and an adverb in drive fast.

So instead of treating parts of speech as rigid labels attached permanently to words, it is often more useful to look at what a word is doing in a particular sentence.

🧱 Nouns: People, Things, Places, Ideas and More

Nouns commonly refer to people, objects, places, concepts, events, and other things we talk about.

The dog is sleeping.
El perro está durmiendo.

Madrid is beautiful.
Madrid es bonito.

Creativity takes practice.
La creatividad requiere práctica.

Concrete nouns such as dog and table are easy to recognize. Abstract nouns such as freedom, difficulty, and knowledge show why the simple rule “a noun is a thing” only goes so far.

A better clue is how the word behaves.

In English, nouns can often occur after determiners:

a problem
the house
this idea

Spanish shows similar patterns:

un problema
la casa
esta idea

Recognizing nouns is particularly useful because many other grammatical elements connect to them.

🏃 Verbs: Actions, States and Events

Verbs often express actions:

The dog runs.
El perro corre.

But verbs do much more than describe visible actions:

They are students.
Son estudiantes.

I know the answer.
Sé la respuesta.

It seems strange.
Parece extraño.

So asking “What's the action?” can help at first, but it won't identify every verb.

Verbs are especially important for language learners because they often change according to grammatical information such as tense, person, number, mood, or aspect.

Spanish makes this particularly visible:

hablo — I speak
hablas — you speak
habló — he/she spoke
hablaríamos — we would speak

English has fewer verb endings, but grammatical information is still expressed through combinations such as:

works
worked
is working
has worked
would work

You don't need to memorize every form before using a verb. But recognizing that these different forms belong to the same underlying pattern can make unfamiliar sentences much easier to understand.

🎨 Adjectives: Adding Information About Nouns

Adjectives describe or classify nouns.

a happy dog
un perro feliz

a difficult question
una pregunta difícil

an interesting book
un libro interesante

This also reveals an important lesson about learning languages: the same grammatical category does not necessarily behave the same way in every language.

In English, adjectives normally appear before a noun:

a red car

In Spanish, many descriptive adjectives commonly appear after it:

un coche rojo

But that is not a simple rule saying “English before, Spanish after.”

Spanish adjectives can also appear before nouns, and their position may change emphasis, interpretation, or style:

un viejo amigo

and

un amigo viejo

do not necessarily communicate exactly the same thing.

Spanish adjective position is therefore a pattern worth noticing rather than a rule that can be reduced to one line.

⚙️ Adverbs: Modifying Actions, Descriptions and More

Adverbs often tell us more about how, when, where, or to what degree something happens.

She answered quickly.
Respondió rápidamente.

I'll call tomorrow.
Llamaré mañana.

It's very difficult.
Es muy difícil.

In the first example, quickly modifies the verb answered. In the third, very modifies the adjective difficult.

This is why the familiar definition “adverbs describe verbs” is useful but incomplete. They can also modify adjectives, other adverbs, and sometimes larger parts of a sentence.

English learners often encounter pairs such as:

a slow car

but:

drive slowly

Here slow describes the car, while slowly describes the manner of driving.

However, don't assume every English adverb ends in -ly:

Drive fast.

Not:

Drive fastly.

Real language is full of patterns — and exceptions to overly simple versions of those patterns.

🎭 Pronouns: Referring Without Repeating Everything

Pronouns allow us to refer to people and things without repeatedly naming them.

Instead of:

John is tired. John wants to sleep.

we normally say:

John is tired. He wants to sleep.

Spanish works similarly:

Juan está cansado. Él quiere dormir.

Pronouns become especially interesting because their form can depend on their grammatical role.

English:

I saw her.
She saw me.

Spanish:

yo
me
mí

These forms are related, but they are not interchangeable.

Spanish also demonstrates why translating pronouns word by word can be misleading. Subject pronouns are often omitted entirely:

Hablo español.

literally contains no separate word equivalent to I, because the verb form hablo already provides that information.

Learning pronouns therefore means learning patterns of use, not just memorizing a translation table.

🔗 Prepositions: Expressing Relationships

Prepositions express relationships involving space, time, direction, cause, association, and many other concepts.

on the table

after dinner

with my friend

from Madrid

They look like small words, but they cause disproportionately large problems for language learners because languages divide these relationships differently.

Compare:

I'm thinking about you.
Estoy pensando en ti.

English uses about; Spanish uses en. Translating either word in isolation will not tell you which one belongs in this expression.

This is why combinations are often more useful than individual prepositions:

interested in

depend on

think about

and in Spanish:

pensar en

depender de

soñar con

Rather than asking “What does this preposition mean?”, it is often better to ask:

What words and constructions does it normally appear with?

🔎 Determiners: Small Words With an Important Job

Words such as:

a, the, this, my, some

often appear before nouns in English and help specify which person or thing we mean.

Spanish has comparable forms:

un, el, este, mi, algunos

Determiners are easy to overlook because they carry less obvious meaning than words such as dog or run. But they are central to sentence structure.

Spanish articles also reveal grammatical information:

el libro
la mesa

The distinction between el and la reflects the grammatical gender of the noun.

Grammatical gender is not the same as biological sex. Libro is grammatically masculine and mesa feminine because that is how these words behave within the grammatical system, not because books or tables possess male or female characteristics.

Gender then influences surrounding words:

el libro rojo

la mesa roja

For learners, the practical lesson is often to learn the noun together with useful grammatical information — for example, la mesa rather than simply mesa.

🔗 Conjunctions: Connecting Ideas

Conjunctions connect words, phrases, and clauses.

Some of the most common are:

and
but
because
although
if

For example:

I wanted to go, but I was tired.

Quería ir, pero estaba cansado.

They may seem less important than nouns and verbs, but conjunctions are essential once you want to express relationships between ideas rather than produce isolated statements.

Compare:

I'm staying home. I'm tired.

with:

I'm staying home because I'm tired.

A single conjunction turns two facts into an explanation.

Languages Don't Divide Everything the Same Way

Parts of speech are extremely useful for describing languages, but we should be careful not to imagine that English grammar provides a universal template.

Languages can express similar meanings using very different structures.

Consider location.

English:

in the house

Spanish:

en la casa

Both use a separate preposition before the noun.

Hungarian can express the same basic spatial relationship using a suffix:

a házban

Here ház means house, while -ban contributes the meaning roughly corresponding to in.

Hungarian also has separate postpositions, so the difference is not simply that one language “has prepositions” and another “has suffixes.” Rather, languages have different grammatical resources for expressing relationships.

Differences can go deeper than that.

The familiar English categories noun, verb, adjective, and adverb do not map perfectly onto every language. Nouns and verbs appear to represent particularly fundamental distinctions and are treated as universal in many linguistic analyses, although even this has been debated. Distinct adjective and adverb classes are much less universal: some languages express many concepts that English treats as adjectives using verb-like structures instead.

For a language learner, there is no need to solve this linguistic debate.

The useful point is simpler:

Don't expect your new language to organize meaning exactly like your first one.

Why Learn These Labels at All?

Knowing that quickly is an adverb will not make you fluent.

And being able to recite a grammar rule does not necessarily mean you can use it automatically in conversation.

But explicit knowledge can still be useful.

Research on second-language learning shows that instruction which draws learners' attention to grammatical form can improve learning. At the same time, researchers distinguish between explicit knowledge — rules and patterns you can consciously think about — and the more automatic knowledge involved in fluent language use. Both contribute to additional-language proficiency.

That makes grammatical terminology useful as a tool rather than as an end in itself.

If you know what an adjective is, you can notice where Spanish places adjectives.

If you recognize a verb, you can compare its different forms.

If you understand what a preposition does, you can start noticing that depend repeatedly appears with on while depender repeatedly appears with de.

The labels help you see the pattern.

The repeated experience of the pattern is what eventually makes it familiar.

Use Grammar to Notice More

You don't need to analyse every sentence.

Instead, occasionally look more closely at something you are already reading or listening to.

Notice a verb and ask how it changes.

Notice where an adjective appears.

Pay attention to the words surrounding a preposition.

Compare a structure with how your own language would express the same idea.

If you use Vocafy's part-of-speech highlighting, the colors can provide a quick visual cue for some of these categories. The purpose isn't to memorize the colors. They simply make grammatical patterns easier to spot while working with real language.

Over time, you may find that something interesting happens.

At first, you consciously notice:

Spanish often puts this kind of adjective here.

Later, you simply expect it there.

Grammar knowledge and language intuition do not have to compete with each other. Used well, a little explicit knowledge can help you pay attention to the patterns that experience gradually makes automatic.