Russian verb conjugation.

The two conjugation classes

Every Russian verb in the present tense follows one of two ending patterns. They're traditionally called First Conjugation (Class I) and Second Conjugation (Class II). The key difference is in the vowel that appears in most endings: -е- for Class I, -и- for Class II.

Consonant mutations

Some verbs change their final consonant in certain forms. This happens most often in the first person singular (я) of Class II verbs, but also in some Class I verbs.

Past tense: forget person, think gender

The Russian past tense is surprisingly simple. You don't conjugate for person at all - instead, the verb agrees with the subject's gender and number. Take the infinitive stem, drop -ть, and add one of four endings:

Future tense: it depends on aspect

This is where Russian gets interesting. How you form the future depends on whether the verb is imperfective or perfective:

• Imperfective future = буду/будешь/будет... + infinitive (compound, like English "will be reading")
• Perfective future = conjugate the perfective verb in "present tense" endings - but the meaning is future (simple, like "will read" = "will finish reading")

Verbal aspect: the concept that changes everything

Most Russian verbs come in pairs: imperfective (process, ongoing, repeated) and perfective (completed, one-time, result). This is the single hardest concept in Russian grammar for English speakers - not because the forms are complex, but because English doesn't have it.

Think of it this way: imperfective = the movie (you're watching the action unfold) and perfective = the photo (the action is captured as a completed fact).

The most important irregular verbs

A handful of Russian verbs break the regular patterns. Unfortunately, they're also the most frequently used verbs in the language. Here are the ones you'll hit in your first week.

быть - to be

In the present tense, Russian drops "to be" entirely. "I am a student" is just Я студент. But быть returns in the past and future:

хотеть - to want (mixed conjugation)

This verb is Class I in the singular and Class II in the plural - the only common verb that switches mid-paradigm:

есть - to eat & дать - to give

These two ancient verbs have their own conjugation pattern that doesn't fit either class:

Motion verbs: the paired system

Russian has a special category of verbs for movement that comes in two imperfective forms: one for a single trip in one direction ("unidirectional") and one for round trips, habitual movement, or movement in general ("multidirectional"). On top of that, each pair has perfective forms made with prefixes.