The Instrumental: Functions Summary
The instrumental case (твори́тельный паде́ж, tvorítelny padézh — "the instrumental case," from твори́ть "to create/do") is the case of means, manner, and accompanying circumstance. Its name tells you its core job: the instrument you do something with. But it stretches far beyond tools — to companionship (с дру́гом "with a friend"), to what you used to be (был врачо́м "was a doctor"), to times of day (у́тром "in the morning"), and to a cluster of static spatial relations. This page collects its surprisingly varied uses on one screen and links each to a fuller lesson. The key practical split: bare instrumental (tool, time, predicate) versus с + instrumental (company).
The forms at a glance
Full paradigm on instrumental forms. The feminine -ью for soft-sign nouns (ночь → но́чью) and the masculine/neuter -ом/-ем are the ones to memorize first.
| Gender / type | Nom. sg. | Instr. sg. | Instr. pl. |
|---|---|---|---|
| Masc. / neut. (hard) | стол (table), окно́ (window) | столо́м, окно́м | стола́ми, о́кнами |
| Masc. / neut. (soft) | слова́рь, мо́ре (sea) | словарём, мо́рем | словаря́ми, моря́ми |
| Feminine -а/-я | ру́чка (pen) | ру́чкой (-ей after soft) | ру́чками |
| Feminine -ь | ночь (night) | но́чью | ноча́ми |
The pronouns:
| Nominative | я | ты | он | она́ | мы | вы | они́ |
|---|---|---|---|---|---|---|---|
| Instrumental | мной | тобо́й | им | ей | на́ми | ва́ми | и́ми |
(After the preposition с and others these add an н-: с ним, с ней, с ни́ми.)
The uses, one example each
1. Means / instrument — the bare tool (no preposition)
The headline use: the thing you do something with / by means of, used without any preposition. English needs "with" or "by"; Russian just puts the tool in the instrumental. See means and instrument.
Запо́лните, пожа́луйста, анке́ту ру́чкой, а не карандашо́м.
Please fill in the form with a pen, not a pencil. — ру́чкой, карандашо́м, bare instrument.
2. Accompaniment — с + instrumental ("together with")
To say "with" in the sense of company, you need the preposition с. This is the crucial contrast with the bare instrument: ре́зать ножо́м ("cut with a knife," tool, bare) versus идти́ с дру́гом ("go with a friend," company, с). See instrumental with с.
Я иду́ в кино́ с дру́гом, хо́чешь с на́ми?
I'm going to the cinema with a friend — want to come with us? — с дру́гом, с на́ми, accompaniment → с + instrumental.
3. The predicate — after быть/стать in past and future
When быть ("to be") is in the past or future, or with стать ("to become"), the predicate noun (a profession, role, identity) goes into the instrumental, not the nominative. See instrumental as predicate.
Ра́ньше он был учи́телем, а пото́м стал программи́стом.
He used to be a teacher, and then became a programmer. — учи́телем, программи́стом, predicate → instrumental.
4. Time of day and seasons
A bare instrumental gives the time of day and the season: у́тром (in the morning), днём, ве́чером, но́чью; весно́й, ле́том, о́сенью, зимо́й.
У́тром я бе́гаю, а ве́чером обы́чно чита́ю.
In the morning I go running, and in the evening I usually read. — у́тром, ве́чером, time of day → instrumental.
5. Manner
A bare instrumental can also express manner — how an action is done: шёпотом (in a whisper), бего́м (at a run), пешко́м (on foot).
Не говори́ так гро́мко, скажи́ мне э́то шёпотом.
Don't talk so loudly, tell me that in a whisper. — шёпотом, manner → instrumental.
6. Spatial prepositions — над, под, пе́ред, за, ме́жду
For static spatial relations, the prepositions над (above), под (under), пе́ред (in front of), за (behind), ме́жду (between) take the instrumental. (Watch the contrast: за/под take the accusative for motion toward, the instrumental for location.) See spatial prepositions.
Кот спит под крова́тью, а ла́мпа виси́т над столо́м.
The cat is sleeping under the bed, and the lamp hangs above the table. — под крова́тью, над столо́м, location → instrumental.
7. Governing verbs — занима́ться, интересова́ться, горди́ться
A set of verbs (many of them -ся reflexives) takes an instrumental object: занима́ться (be occupied with / study), интересова́ться (be interested in), горди́ться (be proud of), по́льзоваться (use), управля́ть (manage/drive). More on instrumental-governing verbs.
Моя́ дочь серьёзно занима́ется му́зыкой и интересу́ется иску́сством.
My daughter studies music seriously and is interested in art. — му́зыкой, иску́сством, governed objects → instrumental.
The unifying insight
How can one case mean a tool, a companion, a former profession, the morning, and "under the table"? The thread is the surrounding circumstance of an action — the how, the with-what, the with-whom, the as-what, the when, the where-around. The instrument is the means; the companion is the accompanying person; the predicate is the role you act as; the time of day is the circumstance you act in; the spatial relation is the position something is amid. None of these is the action's doer or its target — they are its manner and setting. And the single split that organizes the daily use is mechanical: bare instrumental for the means/time/predicate, с + instrumental for company.
Common Mistakes
❌ Я пишу́ с ру́чкой.
Incorrect — a tool takes the BARE instrumental; с is only for company. With с, ру́чкой would mean the pen is your companion.
✅ Я пишу́ ру́чкой.
I write with a pen. — bare instrument, no с.
❌ Ра́ньше он был учи́тель.
Incorrect — past-tense быть puts the predicate in the instrumental: учи́телем.
✅ Ра́ньше он был учи́телем.
He used to be a teacher. — predicate after past быть → instrumental.
❌ Я интересу́юсь му́зыку.
Incorrect — интересова́ться governs the instrumental, not the accusative: му́зыкой.
✅ Я интересу́юсь му́зыкой.
I'm interested in music. — интересова́ться + instrumental.
❌ Кот спит под крова́ть.
Incorrect — 'sleeping' is location, so под takes the instrumental (крова́тью); под + accusative is only for motion.
✅ Кот спит под крова́тью.
The cat sleeps under the bed. — location → под + instrumental.
❌ Я бе́гаю в у́тро.
Incorrect — 'in the morning' is the bare instrumental у́тром, not в + a noun.
✅ Я бе́гаю у́тром.
I go running in the morning. — time of day → bare instrumental.
Key Takeaways
- The instrumental is the case of means, manner, and accompanying circumstance — the how, with-what, as-what, when, and where-around of an action.
- Core split: bare instrumental = tool (ру́чкой), time of day (у́тром), manner (шёпотом), predicate (был врачо́м); с + instrumental = company (с дру́гом).
- Past/future быть and стать put the predicate noun in the instrumental.
- Spatial над/под/пе́ред/за/ме́жду take the instrumental for location (за/под flip to the accusative for motion).
- Several verbs govern it: занима́ться, интересова́ться, горди́ться, по́льзоваться, управля́ть.
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- Instrumental: FormsA2 — The instrumental (твори́тельный паде́ж) endings. Singular: masc/neuter -ом/-ем (столо́м, окно́м, мо́рем), feminine -ой/-ей (кни́гой, неде́лей) and the special feminine -ь → -ью (но́чью, две́рью). Plural: -ами/-ями for everyone (стола́ми, дверя́ми), with irregular людьми́, детьми́. The choice of -ом vs -ем turns on the spelling rule and stress.
- Instrumental: Means and InstrumentA2 — The instrumental's namesake job: it marks the tool or means by which an action is done — and it does so with NO preposition. Писа́ть ру́чкой (write with a pen), е́хать по́ездом (go by train). Beware: с + instrumental means 'together with' (чай с са́харом), so never insert с for a tool. The case also gives time-of-day adverbs (у́тром, ве́чером) and is required by verbs like занима́ться and интересова́ться.
- Instrumental as Predicate (Profession, Becoming)B1 — When 'to be / become / work as / seem' link a subject to a role or state, the role takes the instrumental — especially in the past and future: Он был врачо́м, Она́ ста́ла учи́тельницей. The key contrast: the PRESENT tense uses the nominative (Он врач), but past/future быть and the verbs стать, рабо́тать, каза́ться switch the predicate to the instrumental. Являться always takes the instrumental, even in the present.
- Instrumental with С (Together With)A2 — The preposition с/со + instrumental means 'together with, accompanied by, having' — ко́фе с молоко́м, иду́ с дру́гом, мы с бра́том ('my brother and I'). It is ONLY for accompaniment and ingredients, never for tools (those take the bare instrumental). Watch the trap: the same с + genitive means 'from/off' (с рабо́ты).
- Instrumental After Spatial PrepositionsB1 — The instrumental after location prepositions: над (above), под (under), пе́ред (in front of), за (behind), ме́жду (between), ря́дом с (next to) — над столо́м, под крова́тью, за угло́м. Crucially, за and под switch to the accusative for motion-to: стои́т под столо́м (instr, location) vs поста́вить под стол (acc, destination).
- The Russian Case System: OverviewA1 — Russian has six cases — имени́тельный (nominative), роди́тельный (genitive), да́тельный (dative), вини́тельный (accusative), твори́тельный (instrumental), and предло́жный (prepositional) — and each one is signalled by a change to the noun's ending. This page is your bird's-eye view: the name of each case, the question it answers, the one-line job it does, and one noun (журна́л, magazine) shown running through all six so you can see the whole system at once.