Infinitives

Overview

The infinitive is the default, uninflected form of a verb — the shape you would find in a dictionary. Despite its apparent simplicity, the infinitive carries different grammatical privileges in each of the three languages.

Spanish treats the infinitive as a fully fledged noun: it can serve as subject, object, or predicate without any special marking. English splits its infinitives into two camps — the to-infinitive and the bare infinitive — with the choice governed by the preceding verb or modal. Chinese does not even have a category called “infinitive,” because its verbs never inflect in the first place; the base form is the only form.

These differences create significant transfer errors. Spanish speakers learning English may drop “to” where it is required; English speakers learning Spanish may overuse it; and speakers of both may search in vain for a Chinese infinitive marker that does not exist.

Explanation

Spanish

Spanish infinitives end in -ar, -er, or -ir. They are true verbal nouns:

• As subject: Nadar es saludable (Swimming is healthy).
• As object: Quiero comer (I want to eat).
• After prepositions: antes de salir (before leaving), para estudiar (in order to study).
• After perception verbs: Vi caer la hoja (I saw the leaf fall).

Spanish infinitives can even take direct objects and adverbs, just like finite verbs: Quiero leer este libro mañana (I want to read this book tomorrow).

English

English infinitives come in two forms:

• To-infinitive: used after most verbs (want to go), as subjects (To err is human), and in purpose clauses (I came here to learn).
• Bare infinitive: used after modals (can go, must see), after let and make (let him go), and after perception verbs in active voice (I saw him leave).

The split is largely lexical: you must memorize which verbs take which form. Some verbs accept both with a meaning change: I stopped to smoke (purpose) vs I stopped smoking (habit).

Chinese

Chinese verbs have no finite/non-finite distinction. The same form appears in every context:

• Subject position: 游yóu泳yǒng很hěn健jiàn康kāng (Swimming is healthy) — no special marking.
• After a modal: 我wǒ会huì游yóu泳yǒng (I can swim) — the verb follows the modal directly.
• After another verb: 我wǒ想xiǎng吃chī饭fàn (I want to eat) — the second verb is simply concatenated.
• After prepositions: 为wéi了le学xué习xí (in order to study) — the verb follows 为wéi了le directly.

Because there is no inflection, there is no need for an infinitive marker. The concept of “dictionary form” is identical to the concept of “verb.”

Examples

In Context

Key Takeaways

• Spanish infinitives end in -ar, -er, -ir and can function as nouns freely.
• English has to-infinitives and bare infinitives (after modals); the choice is lexically determined.
• Chinese has no infinitive form because verbs are already unmarked in their base state.
• Not all verbs that take infinitives in Spanish take infinitives in English, and vice versa.

Common Mistakes

1. Spanish speakers learning English: Adding ‘to’ after Spanish modal verbs: ‘Puedo to nadar’

   → Spanish modals are followed directly by the infinitive: Puedo nadar (no ‘to’).

   English modals (can, must, will) also drop ‘to’, but most other verbs require it: I want to swim.

2. English speakers learning Spanish: Using the Spanish infinitive where English needs a gerund: ‘I enjoy to swim’

   → English ‘enjoy’ takes a gerund: I enjoy swimming. Spanish ‘disfrutar’ also takes the infinitive: Disfruto nadar.

   Verb complementation patterns differ across languages and must be learned individually.

3. Chinese speakers learning Spanish: Translating English ‘to’ as Chinese 去qù before every verb

   → Chinese never marks infinitives. Use the bare verb: 我wǒ想xiǎng吃chī (I want to eat), not 我wǒ想xiǎng去qù吃chī.

   去qù can mean ‘go’ and is only used when motion is actually intended.

Related Topics

• Gerunds: How gerunds relates across languages
• Modals: How modals relates across languages
• Verb Complementation: How verb complementation relates across languages
• Participles: How participles relates across languages

References

• Nueva gramática de la lengua española — https://grammarnavigator.com — Grammar Atlas comparative reference
• The Cambridge Grammar of the English Language — https://www.cambridge.org — Comprehensive English grammar reference
• A Comprehensive Grammar of the Modern Chinese Language — https://www.routledge.com — Standard reference for Modern Chinese grammar