Infinitive Constructions in Ukrainian

In Brief

The Ukrainian infinitive—the basic, unconjugated verb form, usually ending in -ти—can name an activity, complete an impersonal expression, or state the purpose of another action: Плавати корисно, Важко зрозуміти, Прийшов допомогти. Unlike English, Ukrainian often needs no equivalent of dummy it or purpose to: the infinitive fits directly into the sentence.

Overview

An infinitive is the basic verb form that does not show person, number, or tense: читати “to read,” зрозуміти “to understand,” допомогти “to help.” In a dictionary, Ukrainian verbs are normally listed in this form. Most infinitives end in -ти; reflexive verbs add -ся or -сь, as in вчитися “to study” and одягтись “to get dressed.”

At B2, the important step is not merely recognizing an infinitive but seeing what job it performs in a sentence. It can act as the subject (what the sentence is about), complete an impersonal evaluation such as “easy” or “necessary,” express purpose, or modify words such as час “time” and нічого “nothing.” These patterns make Ukrainian concise because there may be no separate grammatical subject.

English often uses an -ing form as a subject (Swimming is healthy), inserts dummy it (It is hard to understand), or marks purpose with to (I came to help). Ukrainian can use the same infinitive shape in all three situations. The surrounding words and context reveal its function.

How It Works

Recognizing the infinitive

The neutral standard ending is -ти. The ending -ть also occurs, especially in poetry, songs, fixed expressions, and some informal speech, but learners should use -ти in neutral writing.

Type	Ukrainian form	Meaning
Imperfective	читати	to read; to be engaged in reading
Perfective	прочитати	to read through; to finish reading
Reflexive	вчитися	to study; to learn
Reflexive variant	вчитись	to study; same verb with the shorter -сь variant

The infinitive itself does not identify the doer or the time. Those details come from another verb or from context: Я хочу читати “I want to read,” Вона хотіла читати “She wanted to read.”

1. The infinitive as the subject

An infinitive can name an activity and serve as the grammatical subject:

Плавати корисно. — “Swimming is healthy.”

The usual pattern is:

Pattern	Function	Example
infinitive + evaluation	evaluates an activity	Подорожувати цікаво. “Travelling is interesting.”
infinitive + noun phrase	identifies what an activity is	Чекати — марна справа. “Waiting is pointless.”
infinitive + заборонено/дозволено	states a rule	Курити заборонено. “Smoking is prohibited.”

English often prefers a gerund in this role. Do not try to create a special Ukrainian equivalent of English -ing: use the ordinary infinitive.

2. After impersonal words

Ukrainian frequently combines an infinitive with a predicative word (a word that functions as the main statement without agreeing with a subject). Common examples include важко “hard,” легко “easy,” цікаво “interesting,” потрібно “necessary,” треба “need to,” можна “may/can,” не можна “must not/cannot,” and варто “worth.”

Pattern	Example	Meaning
evaluation + infinitive	Важко пояснити.	It is hard to explain.
modal word + infinitive	Треба працювати.	One needs to work.
permission + infinitive	Можна ввійти?	May I come in?
recommendation + infinitive	Варто спробувати.	It is worth trying.

There is no Ukrainian dummy subject corresponding to English it. Це means “this/that”; it may refer to an actual idea or situation, but it is not automatically inserted just because English has it.

The person experiencing the difficulty, need, or possibility can appear in the dative case (the form often used for the recipient or experiencer):

• Мені важко це зрозуміти. — “It is hard for me to understand this.”
• Нам треба поговорити. — “We need to talk.”
• Тобі можна відпочити. — “You may rest.”

The dative does not turn the infinitive into a conjugated verb. It simply identifies who experiences the state or obligation.

3. An infinitive of purpose

After verbs of motion or arrival, an infinitive can say why someone goes, comes, stops by, or stays:

Я прийшов допомогти. — “I came to help.”

The two actions normally have the same understood doer: the person who came is also the person who will help.

Structure	Example
motion/arrival verb + purpose infinitive	Вона зайшла попрощатися. “She stopped by to say goodbye.”
stay/stop + purpose infinitive	Ми зупинилися відпочити. “We stopped to rest.”
send/invite + infinitive	Його послали купити хліб. “He was sent to buy bread.”

When purpose needs an explicit subject, a fuller explanation, or a contrast between doers, use a clause with щоб “so that/in order to”: Я прийшов, щоб ти мені допоміг “I came so that you would help me.” A bare infinitive would wrongly suggest that I came to do the helping.

4. After nouns, pronouns, and quantifying words

An infinitive can specify what is available, necessary, possible, or intended:

• час іти — “time to go”
• бажання вчитися — “a desire to study”
• можливість поговорити — “an opportunity to talk”
• нічого сказати — “nothing to say”
• є що обговорити — “there is something to discuss”

Particularly useful patterns are є що + infinitive “there is something to…,” нема/немає чого + infinitive “there is no reason/need to…,” and negative pronouns such as нічого “nothing” or нікуди “nowhere.” Their case forms are fixed by the larger construction and by the verb: нічого читати can mean “there is nothing to read,” while ні з ким поговорити means “there is no one to talk with.”

5. Aspect still matters

Ukrainian aspect shows whether an action is viewed as an ongoing/repeated process (imperfective) or as a bounded, completed result (perfective). Infinitives preserve this contrast.

Imperfective	Perfective	Typical contrast
читати	прочитати	read/be reading vs read through
писати	написати	write/be writing vs produce a finished text
робити	зробити	do/be doing vs get done

Compare Корисно читати щодня “It is beneficial to read every day” with Треба прочитати цю статтю до завтра “This article must be read by tomorrow.” The first describes a repeated habit; the second points to a required result.

Examples in Context

Ukrainian	English	Note
Плавати корисно.	Swimming is healthy.	The activity is the subject.
Вивчати мови — цікаве заняття.	Learning languages is an interesting activity.	The infinitive phrase is identified by a noun phrase.
Важко це зрозуміти.	It is hard to understand this.	Impersonal evaluation; no dummy “it.”
Мені легко з нею працювати.	It is easy for me to work with her.	Мені marks the experiencer.
Нам треба закінчити звіт сьогодні.	We need to finish the report today.	Need plus a perfective result.
Тут не можна паркуватися.	You must not park here.	General prohibition.
Варто ще раз перевірити адресу.	It is worth checking the address once more.	Recommendation.
Я прийшов допомогти.	I came to help.	Same person comes and helps.
Вона зайшла забрати документи.	She stopped by to collect the documents.	Purpose after a motion verb.
Ми сіли перепочити.	We sat down to rest for a while.	Purpose of sitting down.
Я відійшов, щоб вони могли поговорити.	I stepped away so that they could talk.	щоб is needed because the doers differ.
У нас немає часу сперечатися.	We have no time to argue.	Infinitive specifies the use of час.
Мені нічого сказати.	I have nothing to say.	Dative experiencer plus нічого.
Тут є на що подивитися.	There is plenty to see here.	Literally, “there is something to look at.”
Що робити далі?	What should we/I do next?	Deliberative question; the doer comes from context.

Common Mistakes

Adding a dummy subject because English uses “it”

• Wrong: Воно важко зрозуміти це.
• Right: Важко це зрозуміти.
• Why: Ukrainian impersonal expressions do not need an empty subject. Воно means “it” only when it refers to an actual neuter noun or identifiable thing.

Using a noun-like verbal form instead of the infinitive

• Wrong: Плавання корисно when you mean the general activity in the simple pattern taught here.
• Right: Плавати корисно.
• Why: Плавання is a real noun, “swimming,” and can be appropriate, but it requires noun agreement: Плавання корисне. With an infinitive subject, the established impersonal form is корисно.

Using a bare infinitive when the doers differ

• Wrong: Я прийшов ти допомогти.
• Right: Я прийшов, щоб ти допоміг.
• Why: A purpose infinitive normally shares its understood doer with the controlling verb. Use щоб and a finite verb (one marked for person) when another person performs the purpose action.

Ignoring aspect

• Less natural: Треба читати лист до вечора when one completed reading is required.
• Better: Треба прочитати лист до вечора.
• Why: A deadline and a required result usually favor the perfective infinitive. Use читати for a process, repeated reading, or a general instruction.

Conjugating the infinitive after an impersonal word

• Wrong: Нам треба закінчимо роботу.
• Right: Нам треба закінчити роботу.
• Why: After треба, the action stays in the infinitive. Нам already identifies who has the need.

Copying English prepositions into the purpose pattern

• Wrong: Я прийшов для допомогти.
• Right: Я прийшов допомогти.
• Why: Ukrainian can place the purpose infinitive directly after the motion verb. Для normally takes a noun or pronoun, not an infinitive.

Usage Notes

Word order is flexible, but neutral patterns usually place the evaluation before the infinitive (Важко пояснити) or the infinitive first when it is clearly the topic (Пояснювати важко). Moving the infinitive can change emphasis: Це важко пояснити highlights the thing being explained, while Пояснити це важко highlights the challenge of explaining it.

The actor is often omitted when the meaning is general: Тут легко заблукати “It is easy to get lost here.” Add a dative form when the experiencer matters: Туристові тут легко заблукати “It is easy for a tourist to get lost here.” In conversation, треба and можна are extremely common and can express anything from practical need to permission; tone and context determine their force.

The short infinitive ending -ть is recognizable Ukrainian but is stylistically marked compared with neutral -ти. You may hear forms such as жить or робить in songs, regional speech, and colloquial usage. For standard formal prose, prefer жити, робити, and other forms in -ти.

Punctuation depends on the structure. A simple verb plus purpose infinitive normally has no comma: Прийшов поговорити. A purpose clause introduced by щоб is separated by a comma: Прийшов, щоб поговорити. A dash may separate an infinitive topic from a noun phrase or create a deliberate pause: Допомагати іншим — важлива справа.

Beyond the Basics / Advanced Use

Deliberative questions and instructions

The infinitive can ask what action should be taken: Що робити? “What is to be done?”; Куди звернутися? “Where should one apply/turn?” This is common in headings, instructions, FAQs, and situations where the responsible person is obvious from context.

An independent infinitive can also express a firm order or prohibition: Не входити! “Do not enter!”; Усім встати! “Everyone, stand up!” This sounds categorical and impersonal. It is common on signs, in official instructions, and in commands where the speaker emphasizes the action rather than a personal relationship. In ordinary friendly conversation, an imperative such as Заходьте “Come in” is usually more natural.

Infinitive and future meaning

The imperfective infinitive also appears with forms of бути to build the compound future: Я буду працювати “I will work,” Вони будуть чекати “They will wait.” Here the infinitive is not a subject or purpose expression; it is part of the verb phrase. Perfective verbs normally use their simple future form instead: Я зроблю “I will do/finish,” not я буду зробити.

Interpretations with negative pronouns

Compact patterns can carry meanings that English states with have, can, or a full relative clause:

• Нема чого боятися. — “There is nothing to be afraid of” or “There is no reason to be afraid.”
• Ніде сісти. — “There is nowhere to sit.”
• Ні з ким порадитися. — “There is no one to consult.”
• Є про що подумати. — “There is something to think about.”

Notice that the preposition required by the verb stays before the pronoun: про що подумати, з ким поговорити, на що подивитися. Learning the verb together with its case and preposition is more reliable than translating word by word from English.

Infinitive subjects versus verbal nouns

An infinitive presents an action dynamically: Подорожувати корисно “Travelling is beneficial.” A verbal noun (a noun made from a verb) treats it more as an activity, field, or named phenomenon: Подорожування потребує планування “Travelling requires planning.” The noun follows noun grammar, including case and adjective agreement; the infinitive does not. Both can be correct, but they are not mechanically interchangeable.

Practice Tips

1. Sort examples by function. Make four columns—subject, impersonal expression, purpose, and noun/pronoun pattern—and place new sentences into them. This trains you to recognize the structure instead of translating every -ти as English to.
2. Practice aspect in pairs. Complete frames such as Корисно ___ щодня and Треба ___ до п’ятниці with imperfective/perfective pairs: читати / прочитати, писати / написати, робити / зробити.
3. Change the doer. Start with Мені важко пояснити and replace мені with тобі, їй, нам, and студентам. Then contrast same-doer purpose (Я прийшов допомогти) with different-doer purpose (Я прийшов, щоб ти допоміг).

Related Concepts

• Prerequisite: Impersonal Constructions — introduces треба, можна, варто, and other subjectless patterns that commonly take an infinitive.