Переверни картину.

Переверни is the imperative, singular, informal form of the verb перевернуть.

So it is used when speaking to:

• one person
• in an informal way
• to give a command like Turn it over / Flip it over

The implied subject is ты, but Russian usually leaves that out in commands.

Examples:

• Переверни книгу. — Turn the book over.
• Переверни картину. — Turn the picture over.

Because картина is the direct object of the verb, so it goes into the accusative case.

Картина is a feminine noun ending in -а, so in the accusative singular it changes to -у:

• картина → nominative
• картину → accusative

So:

• Картина висит на стене. — The painting is hanging on the wall.
• Переверни картину. — Turn the painting over.

Переверни comes from the perfective verb перевернуть, which focuses on a single completed action.

That makes it very natural for a command like:

• Flip the picture over
• Turn the picture over

The imperfective переворачивай would sound different. It can suggest:

• an ongoing action
• repeated action
• a general instruction
• sometimes a more process-focused command

So:

• Переверни картину. = turn it over once, successfully
• Переворачивай картину. = keep turning it over / turn it over as part of a process / do this repeatedly, depending on context

In this sentence, the perfective form is the normal choice.

It most often suggests turn over, flip over, or turn upside down.

The verb перевернуть usually implies changing orientation more strongly than a simple turn. Depending on context, it could mean:

• flip something onto the other side
• invert it
• turn it upside down

If you only mean turn in a more general sense, Russian might use a different verb, such as:

• поверни — turn
• разверни — turn around / unfold / open out, depending on context

So Переверни картину often feels stronger than just turn the picture.

Картина usually means:

• painting
• picture
• sometimes a framed artwork

It often sounds more like an actual artwork than a generic image.

Depending on what you mean, Russian might use different words:

• картина — painting / picture
• картинка — picture, image, illustration; often smaller, simpler, or more casual
• фотография / фото — photograph
• изображение — image, depiction

So if this is an artwork on a wall, картина is a very natural word.

Use Переверните картину.

Переверните is the imperative form for:

• you plural
• you formal singular

So:

• Переверни картину. — informal, to one person
• Переверните картину. — polite to one person, or to several people

This is a very common Russian pattern.

Because Russian normally omits the subject in imperative sentences.

So Переверни картину already means:

• You, turn the picture over

Adding ты is possible, but it adds emphasis, contrast, or emotion:

• Ты переверни картину. — You turn the picture over.

In neutral commands, Russian usually just uses the verb by itself.

The stress is:

• переверни́
• карти́ну

So the sentence is pronounced approximately:

переверни́ карти́ну

If you use IPA, it is roughly:

[pʲɪrʲɪvʲɪrˈnʲi kɐrˈtʲinʊ]

For a learner, the most important thing is to remember:

• stress the last syllable in переверни́
• stress ти́ in карти́ну

Yes. Russian word order is flexible.

The neutral command is:

• Переверни картину.

But you can also say:

• Картину переверни.

That version puts more emphasis on the picture—as if contrasting it with something else.

For example:

• Книгу не трогай, картину переверни. — Don’t touch the book; turn the picture over.

So the original order is the most neutral and natural, but other orders are possible for emphasis.

Yes. The verb is related to a family of verbs about turning or rotating.

A useful comparison:

• вертеть / повернуть — to turn
• перевернуть — to turn over, flip, invert

The prefix пере- often adds the idea of:

• over
• across
• re-
• changing something to the opposite side or position

So перевернуть has the sense of turning something over rather than just turning it in general.