Introduction
Learning Spanish infinitives and que clauses is an essential step in your journey toward fluency. These fundamental grammar structures form the backbone of everyday Spanish conversation and written communication. Whether you are ordering food at a restaurant, expressing your desires, or discussing what others think, you will encounter these patterns constantly. This beginner’s guide will break down these concepts into manageable pieces, showing you how infinitives function independently and how que clauses connect thoughts and ideas. By the end of this article, you will understand how to construct sentences correctly and recognize these patterns when native speakers use them.
Understanding Spanish Infinitives
What Are Infinitives?
The infinitive is the base form of a verb, representing the action without any conjugation or subject. In English, infinitives are preceded by the word to, such as to walk, to eat, or to understand. Spanish infinitives always end in one of three ways: -ar, -er, or -ir. These endings indicate the verb’s conjugation group, which determines how the verb changes based on the subject.
Examples of common Spanish infinitives include:
hablar (to speak)
comer (to eat)
vivir (to live)
estudiar (to study)
aprender (to learn)
escribir (to write)
The infinitive form remains unchanged regardless of who is performing the action. This makes infinitives incredibly useful for expressing general actions, desires, and obligations without worrying about subject-verb agreement.
When and How to Use Infinitives
Spanish speakers use infinitives in several important contexts. First, infinitives appear after modal verbs like poder (can), deber (must), and querer (want). For example:
Yo quiero estudiar español. (I want to study Spanish.)
Ella puede hablar tres idiomas. (She can speak three languages.)
Nosotros debemos aprender gramática. (We must learn grammar.)
Second, infinitives function as the subject of a sentence, similar to gerunds in English:
Leer es importante. (Reading is important.)
Viajar me hace feliz. (Traveling makes me happy.)
Third, infinitives follow prepositions. Common prepositions that precede infinitives include a (to), de (of), and para (in order to):
Voy a comprar leche. (I am going to buy milk.)
Debes dejar de fumar. (You must stop smoking.)
Estudio para obtener mi título. (I study in order to obtain my degree.)
Introduction to Que Clauses
The Basics of Que Clauses
The word que is one of the most versatile words in Spanish. It functions as a relative pronoun, a conjunction, and a question word depending on context. When used as a conjunction to introduce clauses, que connects two independent ideas, allowing speakers to express complex thoughts and relationships between actions. Unlike English, which uses various words like that, which, or who to introduce clauses, Spanish relies heavily on que for many of these connections.
A que clause is a dependent clause that begins with the word que and cannot stand alone as a complete sentence. Instead, it must attach to an independent clause to convey complete meaning:
Creo que mañana llueve. (I believe that it will rain tomorrow.)
Mi hermana dice que ella viene pronto. (My sister says that she is coming soon.)
Espero que tengas un buen día. (I hope that you have a good day.)
Types of Que Clauses
Spanish speakers use que clauses in two primary ways: with the indicative mood and with the subjunctive mood. The indicative mood indicates actions that are certain, real, or completed, while the subjunctive mood expresses doubt, desire, necessity, or unreality.
With the indicative mood, use que clauses to report facts or describe what actually happens:
Sé que tienes razón. (I know that you are right.)
Veo que ella está cansada. (I see that she is tired.)
Me dicen que la fiesta fue excelente. (They tell me that the party was excellent.)
With the subjunctive mood, use que clauses after expressions of wish, doubt, necessity, or emotion:
Quiero que vengas a mi casa. (I want you to come to my house.)
Espero que aprendas rápidamente. (I hope that you learn quickly.)
Es importante que estudies mucho. (It is important that you study a lot.)
Combining Infinitives with Que Clauses
When to Use Infinitives Instead of Que Clauses
One of the trickiest aspects for English speakers learning Spanish is understanding when to use an infinitive instead of a que clause. In Spanish, when the subject of the main clause and the subject of the dependent clause are the same person, you typically use an infinitive rather than a que clause. This rule simplifies sentences and sounds more natural to native ears.
Compare these two sentences:
Quiero que yo estudie. (Incorrect: too literal)
Quiero estudiar. (Correct: I want to study.)
The second version is preferred because both the wanting and the studying are performed by the same subject, which is the speaker. Using infinitives in this situation makes the sentence more elegant and efficient:
Mi padre desea viajar a México. (My father desires to travel to Mexico.)
Preferimos comer pizza esta noche. (We prefer to eat pizza tonight.)
¿Necesitas hablar conmigo ahora? (Do you need to speak with me now?)
Using Que Clauses with Different Subjects
When the subject of the main clause differs from the subject of the dependent clause, you must use a que clause with a conjugated verb rather than an infinitive. This construction is essential for expressing desires, demands, and opinions about what other people should do:
Quiero que mi hermano estudie. (I want my brother to study.)
El profesor requiere que nosotros entreguemos la tarea. (The professor requires that we turn in the homework.)
Mi mamá espera que yo sea doctor. (My mom hopes that I become a doctor.)
Notice that in these examples, the subject of the main clause (I, the professor, my mom) differs from the subject of the que clause (my brother, we, I). This difference in subjects necessitates the use of a conjugated verb in the dependent clause, typically in the subjunctive mood.
Practical Examples and Common Patterns
Expressing Desires and Preferences
One of the most common uses of infinitives and que clauses involves expressing what you or others want. The verb querer (to want) frequently appears in these constructions:
Yo quiero ir al cine. (I want to go to the cinema.)
Mi amigo quiere que vayamos juntos. (My friend wants us to go together.)
Ella quiere aprender a bailar. (She wants to learn to dance.)
Sus padres quieren que ella sea ingeniera. (Her parents want her to be an engineer.)
Expressing Necessity and Obligation
Words like tener que (to have to), deber (must), and necesitar (to need) are essential for expressing obligation and necessity. With infinitives, these express personal requirements:
Tengo que terminar mi proyecto hoy. (I have to finish my project today.)
Debes practicar más. (You must practice more.)
Necesito descansar. (I need to rest.)
With que clauses, they express what others must do:
El jefe dice que necesitamos trabajar el sábado. (The boss says that we need to work on Saturday.)
Es necesario que todos asistan a la reunión. (It is necessary that everyone attend the meeting.)
Expressing Hope and Expectation
The verb esperar (to hope) commonly introduces que clauses in the subjunctive mood, as it expresses desire or hope for something uncertain:
Espero que tengas éxito. (I hope that you have success.)
Esperamos que llueva mañana. (We hope that it rains tomorrow.)
¿Esperas que yo te ayude? (Do you hope that I help you?)
Common Mistakes to Avoid
Mixing Up Infinitives and Conjugated Verbs
A frequent error among beginners is using an infinitive when a conjugated verb is required in a que clause with different subjects. Remember that que clauses always contain conjugated verbs that agree with their subject:
Incorrect: Quiero que mi hermano ir. (using infinitive)
Correct: Quiero que mi hermano vaya. (using subjunctive conjugation)
Forgetting the Que in Dependent Clauses
Unlike English, which often allows omission of that, Spanish requires que to introduce dependent clauses. Always include que to maintain grammatical correctness:
Incorrect: Creo ella tiene razón.
Correct: Creo que ella tiene razón. (I believe that she is right.)
Using Subjunctive with Indicative Triggers
Remember that certain verbs and expressions naturally trigger the indicative mood in que clauses, while others trigger the subjunctive. Words like creer (to believe), saber (to know), and ver (to see) usually take the indicative because they express certainty:
Correct: Sé que es verdad. (I know that it is true.)
Incorrect: Sé que sea verdad. (using subjunctive incorrectly)
Practice Exercises
To solidify your understanding, practice converting between infinitive and que clause constructions:
Convert to infinitive form:
Quiero que estudies español. (I want you to study Spanish.)
Answer: Quiero estudiar español. (if the subject is the same)
Convert to que clause form:
Mi madre desea que yo sea feliz. (My mother desires that I be happy.)
Try changing it to express a different subject’s desire.
Conclusion
Mastering Spanish infinitives and que clauses opens the door to expressing complex ideas and understanding native Spanish speakers more clearly. Remember that infinitives function as unconjugated verb forms used after certain verbs and prepositions, while que clauses introduce dependent clauses with conjugated verbs. The key distinction is subject agreement: use infinitives when both clauses share the same subject, and use que clauses when subjects differ. With consistent practice and attention to these patterns, these essential grammar structures will become second nature, allowing you to communicate more effectively and naturally in Spanish.
