Using Infinitives After Verbs — I can use an infinitive after another verb in common patterns (e.g., like to, want to).

Historical Context & Motivation

Every language needs a way to express complex ideas like wanting, being able to, or needing to do something. In English, we do this naturally when we say "I want to eat" or "She likes to dance." Spanish works in a remarkably similar way, and this pattern has deep roots in the history of the language. Understanding where this structure comes from helps you see why it's one of the most common and useful patterns in Spanish.

Spanish evolved from Latin, the language of the Roman Empire, and the verb + infinitive construction was already a feature of Latin grammar over two thousand years ago. As Latin spread across the Iberian Peninsula and gradually transformed into what we know as Spanish, this structure remained a core feature. The pattern is so efficient that it survived centuries of linguistic change essentially intact.

So why does this matter to you as a Spanish 1 student? The verb + infinitive pattern lets you multiply your expressive power almost instantly. Once you know a handful of trigger verbs (like querer, poder, necesitar) and a set of infinitives, you can form dozens of meaningful sentences without learning any new conjugation patterns. The question this lesson answers is: which verbs pair with infinitives, and how do you build these sentences correctly?

Core Principles & Definitions

Before diving into examples, let's establish the foundational ideas behind the verb + infinitive pattern. An infinitive is the base, unconjugated form of a verb — the form you'd find in a dictionary. In Spanish, infinitives always end in -ar, -er, or -ir (for example: hablar, comer, vivir). When you place an infinitive after a conjugated verb, the infinitive stays in its base form — you never conjugate it. Only the first verb changes to match the subject.

Visual Explanation

As you can see in the diagram, the structure is consistent across different subjects and different trigger verbs. Whether you start with "yo," "ella," or "nosotros," the infinitive at the end always keeps its dictionary form. This consistency is what makes the pattern so powerful for beginning Spanish speakers — once you learn the formula, you can apply it to virtually any combination of trigger verb and infinitive.

How It Works — The Mechanics in Detail

Step 1: Identify Your Trigger Verb

The first step is choosing your trigger verb — the conjugated verb that sets up the infinitive. In Spanish 1, there are two categories of trigger verbs based on how they connect to the infinitive.

Step 2: Conjugate the Trigger Verb

Conjugate the trigger verb to match the subject of the sentence. For example, if the subject is "yo" and your trigger verb is "querer," you conjugate it to "quiero." If the subject is "ellos" and the trigger is "poder," you write "pueden." Note that some of these verbs are stem-changing verbs — querer (e → ie), poder (o → ue), and preferir (e → ie) all change their stems in certain forms. Make sure you conjugate correctly before attaching the infinitive.

Step 3: Attach the Infinitive

Place the infinitive directly after the conjugated verb (or after the preposition, if one is required). The infinitive does not change regardless of who the subject is. "Yo quiero hablar," "Tú quieres hablar," "Ellos quieren hablar" — notice that "hablar" stays exactly the same every time.

Verb Groups & Classification

Not all trigger verbs behave identically. While the core pattern remains the same, it's useful to group them by the type of meaning they express. This classification helps you remember which verb to use in different situations and makes your Spanish sound more natural.

The diagram above organizes trigger verbs into three meaningful categories. The Desire/Preference group includes verbs for expressing what you want, like, or prefer to do. The Ability/Obligation group covers what you can, should, or need to do. The Plans/Learning group expresses what you're going to do, have to do, or are learning to do. Pay special attention to the third group: "ir a," "tener que," and "aprender a" all require a linking word between the conjugated verb and the infinitive.

Worked Example

Let's walk through a complete example from start to finish. Imagine you want to say: "We need to practice Spanish, but María prefers to watch a movie. Tomorrow we are going to study together."

English vs. Spanish — Key Differences

While the verb + infinitive pattern works similarly in English and Spanish, there are important differences that can trip you up. Understanding these contrasts will help you avoid common translation errors and think more naturally in Spanish.

Connection to Advanced Grammar

The verb + infinitive pattern you're learning now is a foundational skill that connects to several more advanced grammar topics you'll encounter later in your Spanish studies. Understanding these connections now gives you a roadmap for where your skills are heading.

One particularly exciting connection is to the informal future tense. When you use "ir a + infinitive" (voy a comer, vas a bailar), you're already using one of the most common ways to talk about the future in everyday Spanish. This construction is so widely used that many Spanish speakers prefer it over the formal future tense in casual conversation. In other words, you're already learning to talk about the future without realizing it.

Practice Problems

Now it's your turn to apply the verb + infinitive pattern. These five problems increase in difficulty, starting with concept recall and building toward creating original sentences. Try each one before checking the answer.

Lesson Summary