Если у тебя есть клей и картон, можно клеить звёзды на плакат хоть весь вечер.

Russian usually expresses possession with the pattern у + person + есть + thing.

So:

• у тебя = at you / with you
• есть = there is / there exists
• клей и картон = glue and cardboard

Literally, it is something like With you there is glue and cardboard, which naturally means you have glue and cardboard.

Using иметь for ordinary possession is much less common in everyday Russian. A sentence like ты имеешь клей sounds unnatural in normal conversation.

Here есть means there is / there exists, but in this pattern it functions as part of have.

So:

• У тебя есть клей = You have glue
• У тебя клей can also occur, but it sounds less neutral and more context-dependent, often like You’ve got glue on you / as for you, glue is involved / you have glue, right? depending on context.

In a straightforward statement of possession, есть is the normal choice.

Можно is an impersonal word meaning something like:

• it is possible
• one can
• it is allowed
• you can

So можно клеить звёзды на плакат means you can stick stars onto the poster or it’s possible to stick stars onto the poster.

This structure is very common in Russian when the speaker is making a general statement rather than emphasizing a specific subject.

Compare:

• Ты можешь клеить звёзды... = You can stick stars...
  This directly addresses you.

• Можно клеить звёзды... = One can stick stars... / You can stick stars...
  This sounds more general, softer, and less personal.

After можно, Russian normally uses the infinitive.

So the pattern is:

• можно + infinitive

Examples:

• можно читать = you can read
• можно рисовать = you can draw
• можно клеить = you can stick / glue

That is why you get можно клеить, not a finite verb form like можно клеишь.

The imperfective клеить is used because the sentence describes an ongoing, open-ended activity.

The idea is not to finish sticking the stars, but rather to spend time doing that activity. This fits especially well with хоть весь вечер.

So:

• клеить = to be sticking / to stick (as an activity)
• a perfective form would suggest a completed result, which does not match the idea of doing it for as long as you want during the evening

In other words, the sentence focuses on the process, not the completion.

It is accusative — but for inanimate plural nouns, the accusative looks exactly like the nominative.

Here:

• singular: звезда
• plural nominative: звёзды
• plural accusative: звёзды

Since звёзды is inanimate, the accusative plural is the same as the nominative plural.

Compare with an animate noun:

• Я вижу звёзды = I see stars
• Я вижу студентов = I see students

For студенты, the accusative plural becomes студентов, not студенты, because it is animate.

Because на can take different cases depending on the meaning.

Here are the two main patterns:

• на + accusative = motion toward / onto a surface
• на + prepositional = location on a surface

In this sentence, the stars are being stuck onto the poster, so Russian uses the accusative:

• клеить звёзды на плакат = stick stars onto the poster

If you were talking about where something already is, you would use the prepositional:

• звёзды на плакате = the stars are on the poster

So the case depends on whether the meaning is placement onto something or location on something.

In this sentence, хоть весь вечер means something like:

• for the whole evening
• all evening long, if you want
• even the entire evening

The word хоть often adds a nuance of even, at least, or if you like / if necessary depending on context.

So here it suggests freedom or unlimited duration:

• можно клеить звёзды на плакат хоть весь вечер
  = you can spend the whole evening sticking stars onto the poster

It does not mean at least the whole evening in a strict literal way; it is more idiomatic and means as long as the whole evening, if you want.

Russian often uses the accusative to express duration of time.

So:

• весь вечер = the whole evening
• всю ночь = the whole night
• весь день = the whole day

This is a very common pattern. The accusative here does not mark a direct object; it marks how long something happens.

So in the sentence, хоть весь вечер tells you the duration of the activity.

Если means if and introduces a condition.

The sentence is structured like this:

• Если у тебя есть клей и картон, ... = If you have glue and cardboard, ...
• ... можно клеить звёзды на плакат хоть весь вечер. = ... you can stick stars onto the poster all evening.

So the first part gives the condition, and the second part gives the result or possibility.

The word order is natural and neutral.

The sentence starts with the if-clause:

• Если у тебя есть клей и картон, ...

Then comes the main clause:

• можно клеить звёзды на плакат хоть весь вечер.

Russian word order is flexible, but this order is very normal because it presents:

1. the condition first
2. then what follows from that condition

You could change word order in Russian for emphasis, but the version given is the most straightforward.

Russian has no articles.

So nouns like:

• клей
• картон
• звёзды
• плакат

do not automatically show a, the, or zero article the way English does.

The exact meaning depends on context. For example:

• клей и картон could mean some glue and cardboard
• на плакат could mean onto a poster or onto the poster, depending on the situation

Russian leaves that distinction to context instead of using articles.

Both клей and картон are mass/material nouns here, like glue and cardboard in English.

Russian often uses the singular for substances and materials:

• есть клей = there is glue / you have glue
• есть картон = there is cardboard / you have cardboard

So the singular is completely natural. It does not mean only one physical unit; it just refers to the material in general.