Russian verbal aspect: imperfective and perfective (читать — прочитать, писать — написать)

Вчера я читал книгу. Потом я прочитал её.Yesterday I was reading a book. Then I finished reading it.

Most Russian verbs come in two forms that share one meaning but look at the action in different ways. This is called aspect. The imperfective verb (читать) names an action as a process, a habit or a general fact. The perfective verb (прочитать) usually presents an action as a single whole, bounded event; with verbs such as прочитать, this means it is completed and has a result.

Quick shortcut: ask yourself whether the action is a process or habit (imperfective: читал, читаю, буду читать) or one finished action with a result (perfective: прочитал, прочитаю; in the pairs of this article it is the finished action).

Two questions, two aspects

Every verb answers one of two questions:

The two verbs of a pair are two forms of the same idea. Many pairs add a prefix to the imperfective verb: читать — прочитать, писать — написать, делать — сделать, смотреть — посмотреть. Other pairs change the stem or the ending: покупать — купить, говорить — сказать. More pairs are in Common aspect pairs for everyday verbs.

When to use the imperfective

The imperfective verb is used for:

• an ongoing action or a process: Я читал книгу. (I was reading a book.)
• a repeated or habitual action: Я читаю каждый день. (I read every day.)
• a general fact or a state: Она любит читать. (She likes reading.)
• an action described by its duration: Он писал письмо два часа. (He wrote a letter for two hours.)

Words such as каждый день, часто, всегда, обычно, долго often point to the imperfective.

When to use the perfective

In the pairs on this page, the perfective verb is used for a single action that reaches its end or result:

• Я прочитал книгу. (I read the book through.)
• Он написал письмо. (He wrote the letter.)
• Она сделала уроки. (She did her homework.)

Words such as наконец, уже, вдруг, за час often go with the perfective: Наконец я прочитал эту книгу. (At last I finished reading this book.)

The tenses of each aspect

The two aspects do not have the same set of tenses:

A perfective verb has no present tense. Its forms look like present-tense endings, but they refer to the future: Я прочитаю книгу means "I will read the book through", not "I am reading". For an action happening now, use the imperfective: Сейчас я читаю. The two future forms have their own articles: Future tense: imperfective (быть + infinitive) and Future tense: perfective (simple future).

The past tense forms of both aspects are built as in Russian past tense: the -л form. Choosing between them in the past is the topic of Aspect in the past tense (imperfective vs. perfective), and the choice in commands is covered in Aspect in the imperative (choosing perfective vs. imperfective commands). The imperative in The imperative mood (basic commands) uses the imperfective forms for now.

Common mistakes

• ❌ Каждый день я прочитал газету. → ✅ Каждый день я читал газету. (a habit needs the imperfective)
• ❌ Наконец я читал эту книгу. → ✅ Наконец я прочитал эту книгу. (a result needs the perfective)
• ❌ Завтра я буду прочитать книгу. → ✅ Завтра я прочитаю книгу. or ✅ Завтра я буду читать книгу. (буду goes only with an imperfective infinitive)

Quick check

Choose the right verb.

1. Каждое утро я ____ кофе. (пью / выпью)
2. Наконец я ____ эту книгу. (читал / прочитал)
3. Он ____ письмо два часа. (писал / написал)
4. Сначала я ____ хлеб, потом приготовлю ужин. (покупаю / куплю)
5. Она часто ____ этот фильм. (смотрела / посмотрела)

Key takeaways

• Most Russian verbs have an imperfective and a perfective form (читать — прочитать), which answer что делать? and что сделать?.
• The imperfective names a process, a repeated or habitual action, a state or a duration; the perfective usually names a single, bounded action, which for the verbs here means completed, with a result.
• Imperfective verbs have a past, a present and a future (буду читать); perfective verbs have only a past and a future (прочитал, прочитаю).
• A perfective form with present-tense endings always refers to the future (Я прочитаю = I will read it through).