Ученик вытянул стенки гончарного изделия.

Because ученик is the subject of the sentence: the person performing the action.

In Russian, the subject is usually in the nominative case, and the nominative singular form here is ученик.

• ученик = student / pupil / apprentice

In this context, it can sound more like apprentice or learner, not necessarily a school student.

Literally, вытянуть often means to pull out, to stretch, or to draw out. But in this pottery context, it means something like:

• pulled up
• drew out
• stretched upward
• formed by pulling

So вытянул стенки refers to pulling the walls of the pottery piece upward to shape them.

This is a good example of how a Russian verb can have a very physical basic meaning, but in a specific craft context it gets a more specialized translation.

Russian past tense verbs agree with the subject in gender and number.

The subject is ученик, which is masculine singular, so the past tense form is:

• masculine: вытянул
• feminine: вытянула
• neuter: вытянуло
• plural: вытянули

So the sentence uses вытянул because the subject is a male student/apprentice.

Стенки is the plural of стенка, which is a diminutive or more specific form related to стена.

In many technical or physical contexts, стенка / стенки means side wall / walls of an object, container, vessel, organ, etc. So in pottery, стенки is very natural for the walls of a ceramic piece.

Compare:

• стены = walls of a building/room
• стенки = walls/sides of an object, often thinner or more specific

So here стенки means the walls of the pottery piece, not architectural walls.

Here стенки is the direct object, so grammatically it is in the accusative plural.

However, for inanimate plural nouns, the accusative form is usually the same as the nominative form. So:

• nominative plural: стенки
• accusative plural: стенки

That is why the form looks unchanged.

The direct object is стенки, because those are what the student shaped/pulled.

This means of the pottery изделие, or more naturally, of the ceramic piece / pottery item.

The noun изделие means item, article, piece, or product.
The adjective гончарный means potter’s, ceramic, or related to pottery.

After стенки, Russian uses the genitive to show possession or relation:

• стенки чего? = the walls of what?
• гончарного изделия = of the pottery piece

So:

• изделия = genitive singular of изделие
• гончарного = genitive singular neuter, agreeing with изделия

Because the verb is acting directly on the walls, not on the whole object as a single unit.

The structure is:

• вытянул стенки = pulled/shaped the walls
• стенки гончарного изделия = the walls of the pottery piece

So:

• direct object: стенки
• dependent genitive phrase: гончарного изделия

In English, we often say the walls of the vessel. Russian does the same thing grammatically.

Вытянул is perfective.

That means the sentence presents the action as completed: the student finished pulling/shaping the walls.

The imperfective partner is usually вытягивать:

• вытягивал = was pulling / used to pull / pulled (process)
• вытянул = pulled successfully / finished pulling / completed the shaping

So this sentence focuses on the result, not just the process.

The word order is fairly neutral:

• Ученик — subject
• вытянул — verb
• стенки гончарного изделия — object

So it follows a common subject–verb–object pattern.

Russian word order is flexible, though. You could change the order for emphasis, for example:

• Стенки гончарного изделия ученик вытянул.

That would put more focus on the walls of the pottery piece.

But the original sentence is the most straightforward and neutral version.

The main stresses are:

• ученИк
• вытЯнул
• стЕнки
• гончАрного
• издЕлия

So the sentence is pronounced approximately as:

uchenIK vyTYAnul STENki gonCHARnava izDEliya

A few useful notes:

• Unstressed о often sounds closer to a in Russian speech.
• In гончарного, the written -ого is often pronounced roughly -ава.
• In изделия, the -ия ending is pronounced as two syllables: -i-ya.

No. Although ученик often means school student or pupil, it can also mean learner, trainee, or apprentice.

In a pottery context, English might naturally translate it as:

• the student
• the trainee
• the apprentice

So the exact English choice depends on the broader context.