Conjugation Basics

Conjugation is the process of changing a verb's form to show who is doing the action, when it happens, and how certain or real it is. In Portuguese, conjugation carries far more weight than in English: a single verb ending can tell you the subject, the tense, and the mood all at once, often without needing any other words.

The basic formula

Every conjugated Portuguese verb has two parts:

Stem + Ending = Conjugated form

The stem carries the core meaning of the verb. The ending carries the grammatical information: who, when, and how.

To get the stem, remove the infinitive ending (-ar, -er, or -ir). From falar, the stem is fal-. From comer, com-. From partir, part-. Then you add the appropriate ending for person, number, tense, and mood.

What a verb ending tells you

A single Portuguese verb ending encodes up to four pieces of information simultaneously:

This is why Portuguese can drop subject pronouns so freely. In English, speak could be I speak, you speak, or they speak. In Portuguese, each of those is a different word with a different ending.

No pronouns appear, yet the meaning is completely clear from the endings alone.

Subject pronouns in European Portuguese

Before you can conjugate, you need to know the subject pronouns. European Portuguese has six grammatical persons, though daily speech effectively uses five:

The pronoun vós is nearly extinct in everyday speech. You may encounter it in prayers, literature, or very formal ceremonies, but modern EP uses vocês for "you all" in almost every situation.

Walking through falar in the present tense

Let's conjugate falar (to speak) fully in the present indicative. This is the most common pattern for -ar verbs, and since -ar verbs make up the vast majority of Portuguese verbs, this is the single most useful set of endings you will learn.

Notice that the eu form ends in -o, the tu form ends in -as, and so on. Each ending is distinct, which is what allows you to drop the pronoun.

Reading the endings in context

Once you know the endings, you can identify the subject from the verb alone:

The -amos ending tells you the subject is we, even though nós is never said.

The -am ending signals a plural subject, and vocês clarifies that it means "you all" rather than "they."

The -a ending matches the third-person singular subject a Maria.

The -as ending immediately identifies the subject as tu.

Why pronouns are often dropped

Because the endings are so distinctive, European Portuguese routinely omits subject pronouns. You include them only when you want to add emphasis, contrast, or clarity:

Here the pronouns eu and ela are included for contrast. Without the contrast, you would simply say Falo inglês.

The -o ending is enough. No pronoun needed.

The three verb classes at a glance

Portuguese infinitives end in one of three ways, and the class determines which set of endings the verb takes:

• -ar verbs (first conjugation): falar, estudar, trabalhar — by far the largest group
• -er verbs (second conjugation): comer, beber, escrever
• -ir verbs (third conjugation): partir, abrir, dormir

The stem is always what remains after removing -ar, -er, or -ir. The endings differ slightly between classes, but the underlying logic is exactly the same: stem + ending.

Notice that all three classes use -o for the eu form in the present tense. The differences appear in the other persons, which you will see in detail in The Three Verb Classes.

Regular vs irregular verbs

Most Portuguese verbs are regular: they follow the standard pattern for their class. Once you know the endings for -ar verbs, you can conjugate falar, estudar, trabalhar, comprar, and hundreds of others without memorizing each one individually.

However, some of the most common verbs are irregular — they change their stem, their endings, or both. Verbs like ser (to be), ter (to have), ir (to go), and estar (to be) do not follow the regular patterns.

Next steps

Now that you understand what conjugation is and how it works, see The Three Verb Classes to compare -ar, -er, and -ir endings side by side. For a full picture of the pronoun system, visit Subject Pronouns.