В вазе стоит лилия.

Because after в when it means in and answers the question where?, Russian uses the prepositional case.

• ваза = dictionary form, nominative
• в вазе = in the vase, prepositional

So:

• ваза → в вазе
• книга → в книге
• комната → в комнате

Here, в вазе is a location phrase: in the vase.

Russian often uses different verbs depending on the physical position of something.

• стоять = to stand
• лежать = to lie
• висеть = to hang

A flower in a vase is conceptualized as standing upright, so Russian naturally says лилия стоит.

This is very normal in Russian, even where English might simply say there is or is.

Compare:

• На столе стоит ваза. = A vase is standing on the table.
• На столе лежит книга. = A book is lying on the table.
• На стене висит картина. = A picture is hanging on the wall.

So стоит is not strange here—it is the most natural choice.

Grammatically, yes, but it sounds less natural in this context.

Есть is used for existence: there is / there exists. It is possible, but Russian usually prefers a more specific positional verb when talking about objects in space.

So:

• В вазе стоит лилия. = the natural way
• В вазе есть лилия. = possible, but more like emphasizing mere existence

A native speaker would usually choose стоит here.

Because лилия is the subject of the sentence.

The subject is the thing doing the action or being described by the verb. Here, the lily is the thing that stands.

So:

• лилия = nominative singular
• стоит agrees with it in 3rd person singular

Structure:

• В вазе = location
• стоит = verb
• лилия = subject

Even though the sentence begins with the location phrase, the subject is still лилия.

Russian has no articles.

So лилия can mean:

• a lily
• the lily

The exact meaning depends on context.

Likewise, в вазе can mean:

• in a vase
• in the vase

English forces you to choose an article, but Russian does not.

Yes. Russian word order is more flexible than English word order.

You could also say:

• Лилия стоит в вазе.

Both are correct, but the emphasis is slightly different.

• В вазе стоит лилия. → focuses more on the location first, or presents what is in the vase
• Лилия стоит в вазе. → focuses more on the lily itself

Russian often puts known or contextual information earlier and new or important information later.

Often yes, but not always in the same way English uses it.

In Russian, verbs like стоять, лежать, and висеть are used much more naturally and frequently for ordinary descriptions of where things are.

So while стоит literally means stands, in practice it can also function like a natural way to say that something is positioned somewhere upright.

That is why В вазе стоит лилия sounds completely ordinary in Russian, even if English might just say There is a lily in the vase.

Usually лежит would not work, because a lily in a vase is not thought of as lying down.

• лежит = lies, is lying
• стоит = stands, is standing

Находится is grammatically possible, but it is more formal, neutral, or technical.

Compare:

• В вазе стоит лилия. = natural everyday Russian
• В вазе находится лилия. = more formal, less conversational

So стоит is the best everyday choice.

The stresses are:

• в ва́зе
• стои́т
• ли́лия

So the full sentence is pronounced:

В ва́зе стои́т ли́лия.

Stress matters in Russian, so it is good to learn words together with their stress.

Стоит is the 3rd person singular present-tense form of стоять.

Conjugation:

• я стою
• ты стоишь
• он / она / оно стоит
• мы стоим
• вы стоите
• они стоят

Since лилия is singular, the verb must also be singular:

• лилия стоит

If the subject were plural, the verb would change:

• В вазе стоят лилии. = Lilies are standing in the vase.

Not always, but in this sentence it does.

В can mean:

• in
• into (with motion)

The case tells you which meaning is intended.

• в вазе = in the vase → location → prepositional case
• в вазу = into the vase → direction/motion → accusative case

Compare:

• Лилия стоит в вазе. = The lily is in the vase.
• Я ставлю лилию в вазу. = I put the lily into the vase.

So the form of ваза changes depending on whether you mean location or movement.

It is a normal and natural Russian sentence.

The structure [location] + [positional verb] + [object] is very common in real Russian:

• На столе лежит книга.
• У окна стоит стул.
• На стене висит фотография.

So В вазе стоит лилия is not an artificial pattern. It reflects a very common way Russians describe where things are.