Verb aspect. Perfective and imperfective

In English, «I wrote a letter» is a single phrase. In Russian, you have a choice. «I was writing a letter.» «I wrote a letter.» These phrases are about different things. The first is about a process that may not have ended. The second is about a result that definitively exists. Hidden in this pair is one of the most complex and simultaneously philosophical categories of Russian grammar: verb aspect.

In international Russian language textbooks, this area is called "Russian aspect" or "perfective/imperfective Russian." Everyone who seriously studies Russian has to navigate this topic like threading a needle. And every bilingual child who speaks Russian at home encounters it sooner or later.

In this article, we'll explore what verb aspect is, how aspectual pairs are formed, how to choose between «делал» (did) and «сделал» (did), and what mistakes bilingual children and adult foreigners make on this topic. Through three stories. Kostya, eight years old, from Chicago. Amy, a yoga instructor from Denver, who is learning Russian for work and travel. And Dasha, thirteen years old, from Toronto.

What is verb aspect

Kostya is returning from Sunday Russian school in Chicago. His mom asks in the kitchen, «Did you do your homework?» Kostya honestly replies, «Yes, I did.» Mom clarifies, «But did you finish it?» Kostya gets embarrassed. For him, "did" and "finished" are the same thing.

In reality, these are two different actions. «Did» (past imperfective) implies that Kostya was sitting at the table, writing something, reading something. But it's not guaranteed that he finished. Maybe he didn't finish the last point. Maybe he got distracted by YouTube. «Finished» (past perfective) means the task was completed entirely. From the first point to the last.

In Russian, all verbs are divided into two large groups by aspect. Imperfective aspect (to do, to write, to read) describes the process. The action is happening, lasting, repeating. Perfective aspect (to do, to write, to read) describes the result. The action is finished, has had an effect, is completed.

English doesn't have this kind of division at the verb level itself. The verb itself doesn't indicate whether an action has been completed or not. If you need to emphasize the result, context is added or the tense is changed. I was writing a letter (I was in the process). I wrote a letter (I wrote it at some point in the past, usually implying completion). I have written a letter (I have definitely finished, and the fact is important now). In Russian, all of this is handled within the verb itself.

Therefore, for Kostya, the discussion about "did" and "done" is not just a vocabulary question. It's a new mental category that simply doesn't exist in his English. And mastering it usually takes a year or two of regular practice at home.

Formation of specific pairs

Amy teaches yoga in Denver and has been learning Russian for two years. She started learning because there are many Russian-speaking clients from Colorado at her studio. Then she became passionate about it and decided to travel to Russia to visit places associated with the Silver Age. Now she works with a tutor twice a week and has almost reached the second level of proficiency.

Amy's first serious discovery about verb aspect was this: Aspectual pairs are not just two words on the same topic. They are two words connected by a strict rule. And there are several main ways of forming pairs in Russian.

The most common way is with a prefix. You take an imperfective verb, add a prefix to it, and it becomes perfective. To do/to get done. To write/to write (complete). To read/to read (complete). To prepare/to prepare (complete). To learn/to learn (complete). Each time, the prefix slightly changes the nuance, but the main thing is it turns the process into a result.

Another way works through the suffix. The verb changes its internal form: reshat'/reshit' (to solve), poluchat'/poluchit' (to receive), brosat'/brosit' (to throw). There is no prefix here, but the phonetic structure of the word changes so that the aspect switches.

There are also pairs where the two words are not alike in appearance at all. Take/to take. Speak/to say. Put/to place. Catch/to catch. Linguists call such pairs suppletive, from the Latin "supplere," to supplement. These pairs simply have to be memorized.

Sometimes one verb in Russian doesn't have a perfective counterpart. The verb «жить» (to live) in its pure form only exists as imperfective. To express a specific completed action, prefixes are added and the meaning changes (прожить - to live through, пережить - to survive, выжить - to survive). And some verbs only exist in the perfective aspect. For example, there's no imperfective form of «опомниться» (to come to one's senses).

Amy keeps a table of verb pairs in a notebook. She has about a hundred of them today. When she encounters a new verb in a textbook or book, her first reaction is to look for its pair. This is the next level of language proficiency.

Most frequent species pairs

The most frequent verb pairs that both Kostya and Emi start with are those with basic, everyday verbs. To do/to get done. To write/to have written. To read/to have read. To learn/to have learned. To cook/to have cooked. To buy/to have bought. These pairs are encountered in speech every day, and through them, the aspectual system is learned the quickest.

A special case involves pairs formed with the prefix «по-». Завтракать/позавтракать (to have breakfast/to have had breakfast). Обедать/пообедать (to have lunch/to have had lunch). Гулять/погулять (to walk/to have a walk). Звонить/позвонить (to call/to have made a call). The prefix «по-» often signifies not just the completion of an action, but its brevity or a specific instance. «Я позавтракал» means «I recently ate in the morning and finished.» «Я завтракаю» in the same situation would mean the person is in the process of eating.

Each pair exists in all tenses of the Russian language, and each form changes by person, number, and gender. Read more about how each verb's forms change in our article about Verb conjugation in Russian.

Standing apartVerbs of motion (to go on foot/to walk, to go by transport/to travel by transport, to carry (in one direction)/to carry (habitually or back and forth), and similar). Their aspect system is structured differently than that of regular verbs and deserves a separate article. Kostya, for example, gets confused not only with "did/did (completed)" but also with "went (completed)/went (habitually or back and forth)".

When to use which type

Dasha is in the eighth grade in Toronto. At home, she speaks Russian with her mother, and at school, she speaks English with her classmates. Her foundational Russian is solid; she reads Chekhov in the original and communicates easily with her grandmother via video call. However, she sometimes falters with verb aspects.

Once she told her mother, «I was reading this book.» She meant that she had finished it and now wanted to discuss it. Her mother didn't understand. According to Russian logic, «читала» (chitala) means either the process (I am reading now) or the distant past (I read this book before, I don't remember the details). If you want to say «I finished reading this book,» you need to say «Я прочитала эту книгу» (Ya prochitala etu knigu). «Прочитала» (prochitala) with the prefix «про-» means the book is closed, finished, and a trace remains in the mind.

The main rule for choosing a verb aspect is simple. If you're talking about a fact or a result, use the perfective aspect (did, wrote, read). If you're talking about a process or a repeated action, use the imperfective aspect (was doing, was writing, was reading).

The second important rule is related to repeated actions. Any repetition, even a regular one, is expressed only by the imperfective aspect. «Every morning I write letters» (imperfective). «I write to my mom every week» (imperfective). You cannot replace «write» with «wrote» in these phrases because the perfective aspect does not have a present tense. The perfective exists only in the past (wrote) and future (will write).

The third point is negation. In Russian, the aspect often shifts with «not.» «I did not do the homework» (imperfective, describes the absence of the process itself; the student didn't even sit down at the desk). «I did not finish the homework» (perfective, describes the absence of the result; the student sat and tried, but didn't finish). It's a small difference, but it changes a lot in casual conversation.

And a fourth case that even adult foreigners fall for. After certain introductory words, the aspect is fixed. «Need to do» (perfective only). «Can do» or «can make» (both options are possible, depending on the meaning). «Cannot do» is usually imperfective because it refers to a prohibition of the process itself. The perfective «cannot make» also occurs, but with a different meaning, about the impossibility of the result («this cannot be done by any means»).

Common mistakes of bilinguals and foreigners

Kostya, Amy, and Dasha have their own sets of common errors, but many of them are typical for anyone learning Russian as a second language.

The most common mistake among bilingual children is using the imperfective aspect where the perfective is needed. «I was eating dinner» instead of «I ate dinner.» This is a transfer of English logic, where the verb itself doesn't indicate completion.

The opposite can also happen. A bilingual child picks up the prefixed perfective aspect from their parents and starts using it in incorrect contexts. «I wrote a letter to grandma every morning.» Here, the imperfective «write» (пишу) is needed because «every morning» implies repetition, and a repetitive action in Russian is always expressed by the imperfective aspect.

For adult foreigners, the typical difficulty is forming a couple. Amy regularly says «ya gotovila obed» meaning «I cooked lunch» (and finished). But «gotovila» in Russian means the process. To talk about the result, you need «prigotovila». This one prefix «pri-» changes everything.

Dasha stumbled into a classic «need» trap. She wrote to her mom: «Need to do homework before dinner.» Her mom corrected her: «Need *to get homework done*.» In Russian, «need» is almost always followed by a perfective verb because «need» implies a result, not a process. «Need to do» is only possible in very specific contexts, like «you need to do exercises every day.».

And there's another story that almost all bilinguals fall for. It's the confusion with prefixed verbs of motion. «I came to school» (perfective, specific moment of arrival) and «I went to school» (imperfective, repeated action in the past). Kostya, in first grade, said «I go to school today,» meaning «I came today.» The teacher corrected him about five times, and after a month, the correct form became ingrained.

Verb aspect is one of the most complex and simultaneously most useful topics in Russian grammar. Complex, because such a category is unusual for an English-speaking mind. Useful, because one correctly chosen aspect transforms choppy student speech into lively and precise speech.

Kostya, Amy, and Dasha are three stories that we went through on this topic. Each has their own age and their own journey, but one thing unites them all. They are learning to see the dual nature of each verb. Process and result. Duration and completion. This is the transition to the next level of Russian language proficiency. If you want to go through this topic with a teacher, Palme School offers two free lessons for new students. The first is an introductory lesson with a methodologist, where your level is assessed and a group is selected. The second is a trial lesson in a group with a teacher. You can sign up on the page bilingual schools or Russian as a Foreign Language.