What are Zaliznyak verb classes?

A classification by Russian linguist A.A. Zaliznyak that organizes every Russian verb into one of 16 morphological classes (plus a small irregular set). Each class predicts the entire paradigm: present, past, imperative, participles, gerunds. A class label like [4c] tells you class 4 + stress type c, fully determining how the verb conjugates.

Why are there 16 Russian verb classes?

Russian morphology has gradually consolidated thousands of distinct inflection patterns into 16 productive classes. Each class is defined by a unique combination of infinitive shape (-ить, -ать, -чь etc.), present-tense stem structure, and mutation pattern. Some classes (1, 2, 4) are very large; others (8, 9, 14) contain only a few high-frequency verbs.

How do I figure out a verb's Zaliznyak class?

Easiest: look it up in a dictionary that lists the class label. Otherwise: identify the infinitive ending (-ить → class 4; -овать → class 2; -нуть → class 3) and check the 1sg/2sg present forms for mutations. The class becomes the diagnostic constellation of {infinitive shape, present-tense shape, mutation pattern}.

Which Russian verb class is largest?

Class 1 (-ать verbs with -аj- present stem) is the most populated: рабо́тать, ду́мать, чита́ть, де́лать. Class 4 (-ить verbs with 1sg mutation) is second. Together they cover roughly half the verb lexicon. The smaller classes (8-14) house high-frequency irregulars like нести́, мочь, дать.

Do I really need to know all 16 classes?

For passive understanding: no, knowing the patterns is enough to recognize forms. For active production: yes, knowing the class lets you generate any form on the fly without memorizing each one. Most learners hit class fluency around B1.

Russian Zaliznyak Verb Classes

What is the Zaliznyak system?#

The Russian linguist A.A. Zaliznyak (1935–2017) built the most comprehensive morphological classification of Russian verbs. His system slots every regular verb into one of 16 classes based on the relationship between the infinitive stem and the present-tense stem, plus a small set of irregulars that fit no class. The notation looks like [4c]: class number plus a stress letter.

An owl professor at a chalkboard, taxonomies of verb classes

Why bother with classes when the two big conjugations (1st and 2nd) already explain most paradigms? Because they don't explain all of them. The two-conjugation view is great for learning to speak, but it groups verbs that conjugate quite differently in detail. Zaliznyak's 16 classes capture every quirk: stem mutation, vowel insertion, suffix drop, so once you know a verb's class you can produce all its forms mechanically.

The stress letters: a, b, c#

Three letters cover every regular stress pattern. The class number says how the stem changes; the letter says where the stress sits. See the Stress Patterns chapter for paradigms and the вы- exception.

aType a: stem-stressed

Stress sits on the same stem syllable in every form of the paradigm. The most predictable pattern.

bType b: ending-stressed

Stress sits on the ending in every conjugated form. The stem is unstressed throughout.

cType c: moving stress

End-stressed in the я-form, root-stressed in every other form. Common in 2nd-conjugation verbs.

Where to start#

Sixteen classes sounds overwhelming, but they don't sit on a flat plane. Three observations compress them mentally; a two-step strategy turns the system into a learnable plan.

Size

Classes 1–4 are huge, thousands of verbs each. 5 and 6 are medium. 7 and 8 are small. 9–16 and irregular are tiny: a handful per class.

Predictability

1–4 follow the infinitive's shape exactly. 7–16 wear their oddness on the ending (-ти, -чь, -ереть…) so you can spot them on sight.

The "gotcha" pair

Class 5 looks like an -еть/-ать verb but conjugates 2nd-conj (смотреть → смотрю, смотришь). Class 6 looks like a class-1 -ать verb but mutates a stem consonant (писать → пишу, пишешь).

From ending to class#

When you meet a new verb in the wild, the infinitive's ending narrows the search dramatically. Most endings map to one or two classes; only -ать, -еть and -ять are genuinely ambiguous, and even those reduce to just a few options.

Ending	Possible classes	Notes
-ить	4, 11, 12, 16, irreg	Almost always [4]; the rest are short closed lists.
-ать	1, 2, 5, 6, 13, 14, 15, irreg	The hardest ending: eight possible classes.
-еть	1, 5, 9, 12, 15, irreg	Mostly [1] (умéть) or [5] (видеть, сидеть).
-ять	1, 5, 6, 14, 15	Mostly [1]; a/е/у before -ять → [6]; о before -ять → [5].
-уть	3, 12	Almost always [3] (-нуть). [12] only for -дуть and обуть.
-оть	10	Always [10]. No exceptions.
-ыть	12, 15, 16, irreg	[12] is the default (мыть). быть is irregular.
-сти / -сть / -зти / -зть	7	Always [7] (нести, вести). Exceptions: есть, клясть (irreg).
-чь	8	Always [8] (мочь, печь). Exception: -стичь (достичь) is [3].
-дти / -йти	irreg	Always irregular (идти, прийти).

-ять verbs#

-ять is the cleanest ambiguous ending. One rule, no exceptions: look at the letter immediately before -ять.

о before -ять	[5b]	стоя́ть, боя́ться End-stressed throughout. Only two verbs.
а / е / у before -ять	[6a] / [6b]	таять, наде́яться, чу́ять; смея́ться Stem-stressed (та́ю). Only смея́ться is end-stressed.
Consonant before -ять	[1a] (default); [14] for closed group	гуля́ть (1a) · взять, поня́ть (14) Default [1a] end-stressed. Exceptions: кла́няться, ка́шлять.

-еть verbs#

Most -еть verbs are either [1a] (уметь) or [5b] (сидеть): no foolproof rule distinguishes them from the infinitive alone. The exceptions form a short list.

[5a]	stem-stressed throughout	ви́деть, оби́деть, зави́сеть
[5c]	moving stress	смотре́ть, терпе́ть, верте́ть (хоте́ть looks similar but is irregular)
[9b]	-ереть verbs	уме́реть, тере́ть, запере́ть
[12b]	single verb	петь → пою́, поёшь
[15a]	single verb	деть → де́ну, де́нешь

-уть verbs#

Almost every -уть verb is actually -нуть in class 3: short, single-event semelfactives (крикнуть, вернуть, тронуть). Two tiny exception families:

default	Class 3 (-нуть)	верну́ть, кри́кнуть, отдохну́ть Either [3a] (stem) or [3b] (ending): fixed stress.
-дуть verbs	[12a]	дуть, наду́ть, разду́ть Stem-stressed.
обу́ть / разу́ть	[12b]	обу́ть, разу́ть End-stressed.

-ить verbs#

Once the small exception list is memorised, every new -ить verb is class 4 (model: говорить). Picking between [4a]/[4b]/[4c] has no shortcut: Wikipedia lists roughly 1000 / 1100 / 800 respectively.

default	Class 4	говори́ть, ходи́ть, проси́ть See the Stress Patterns chapter for [4a]/[4b]/[4c].
4-letter -ить	[11b]	пить, бить, лить, вить, шить End-stressed (пью, пьёшь). Closed list.
жить	[16b]	жить → живу́, живёшь Stem gains -в- in the present.
брить, гнить, почи́ть	[12]	брить → бре́ю, бре́ешь Three verbs total.
irreg	irreg	ошиби́ться, вышиби́ться Anomalous reflexives.

-ать verbs#

-ать is the largest ending. It splits cleanly into three sub-groups by what comes before -ать:

ends in -вать	see §10 below	называ́ть, спра́шивать, дава́ть Largest sub-group; treated separately.
-жать / -чать / -шать / -щать	[1a] or [5b]	защища́ть; держа́ть, лежа́ть, молча́ть Most [1a]. [5b] for sound/motion verbs: лежа́ть, бежа́ть, молча́ть, крича́ть, дрожа́ть, стуча́ть, шурша́ть.
everything else	[1a] or [6]	чита́ть, рабо́тать; писа́ть, иска́ть, бра́ть Default [1a]. [6] for consonant-mutation verbs (писа́ть → пишу́) and stem-reduction verbs (брать → беру́).

-вать verbs#

-вать verbs are over a third of all -ать verbs and the most regular sub-group. One stress rule covers almost every one:

-ивать / -ывать	[1a]	спра́шивать, забыва́ть, называ́ть All imperfective. ~247 verbs.
-овать / -евать	[1a], [2a], or [2b]	ри́совать, танцева́ть, сова́ть 2-syl roots → [2b]; 3+ syl → [2a].
-авать	[13b] / [1a]	дава́ть, става́ть; пла́вать Almost all [13b]. Only пла́вать is [1a].
-звать / -рвать	[6b]	звать, рвать Two verbs. Conjugate like зову́, рву́.

All 16 classes#

A mole librarian pulling a card from a tall card-catalog of small drawers, verbs sorted into classes

Each card below covers one class: a short definition, a handful of example verbs, and a link into the grammar chapter that goes deeper. Tap any [1a]-style badge anywhere on the site to land back here at the matching anchor.

Class 1: vowel-stem -ать

Productive[1]

1st conjugation. Stem ends in a vowel; the present-tense suffix attaches cleanly with no mutation.

читать, знать, работать, делать

Zaliznyak Verb Classes

Frequently asked questions