Стоит нам повесить гирлянду, как даже обычная комната становится уютнее.

Here стоит is part of an idiomatic construction, not the literal verb to stand.

Стоит + dative + infinitive means something like:

• one has only to ...
• as soon as ...
• it takes only ... for ... to happen

So:

Стоит нам повесить гирлянду, как...
= As soon as we hang up a garland / string of lights, ...
= We only have to hang up a garland, and ...

This is a very common Russian pattern.

Because the construction стоит кому-то сделать что-то requires the person in the dative case.

So:

• мы = we (nominative)
• нам = to us / for us (dative)

In this pattern, Russian treats the person as the one for whom it is enough to do something:

• Стоит мне позвонить... = As soon as I call...
• Стоит тебе спросить... = You only have to ask...
• Стоит нам повесить гирлянду... = As soon as we hang up the lights...

So нам is required by the grammar of this expression.

Because after стоит in this construction, Russian uses an infinitive:

• Стоит нам повесить гирлянду...
• Стоит тебе открыть окно...
• Стоит ему начать говорить...

The infinitive names the action that triggers the result.

So the structure is:

Стоит + dative pronoun/noun + infinitive, как + result clause

Повесить is the perfective form, while вешать is imperfective.

Here perfective is natural because the sentence refers to a completed action that immediately produces a result:

• повесить гирлянду = to hang up the garland / string of lights
• once that action is done, the room becomes cozier

With стоит ... как ..., perfective often fits well because it marks the action as a single event leading to a consequence.

If you said вешать, it would sound less natural here, because imperfective would suggest process, repetition, or an ongoing action rather than a completed trigger.

Because it is the direct object of повесить.

The verb повесить means to hang up something, so the thing being hung is in the accusative:

• повесить гирлянду
• повесить картину
• повесить шторы

Since гирлянда is a feminine noun, its accusative singular is гирлянду.

Right — here как does not mean how.

In this sentence, как is part of the fixed pattern:

Стоит ..., как ...

This means:

• as soon as ...
• no sooner ... than ...
• once ... , then ...

So in this construction, как introduces the result that follows immediately after the first action.

It is better to understand стоит ... как ... as a whole pattern rather than translating как separately.

Because the sentence has two parts:

1. Стоит нам повесить гирлянду
2. как даже обычная комната становится уютнее

The second part is a separate clause, introduced by как in this correlative structure. Russian punctuation normally puts a comma between these two parts.

So the comma helps show the relationship:

• first: the trigger
• second: the result

Даже means even.

It adds emphasis:

даже обычная комната становится уютнее
= even an ordinary room becomes cozier

The idea is that hanging up the garland changes the atmosphere so much that even a plain, normal room feels more welcoming.

Because обычная комната is the subject of the second clause:

даже обычная комната становится уютнее

Here:

• комната = subject, so it is in the nominative
• обычная agrees with комната in gender, number, and case

So the second clause literally means:

even an ordinary room becomes cozier

Становится means becomes, and уютнее is the comparative form of уютный (cozy, comfortable).

So:

• уютный = cozy
• уютнее = cozier / more cozy

Russian often uses the comparative without a separate word for more:

• теплее = warmer
• лучше = better
• уютнее = cozier

So становится уютнее literally means becomes cozier.

Because the sentence expresses a general truth or regular result, not just one specific past event.

Russian often uses the present tense for things like:

• general observations
• habitual results
• vivid statements of what happens

So:

Стоит нам повесить гирлянду, как даже обычная комната становится уютнее.

means something like:

Whenever we hang up a garland, even an ordinary room becomes cozier.
or
As soon as we hang up a garland, even an ordinary room becomes cozier.

The present tense makes it sound like a general fact.

Yes, somewhat. Russian word order is more flexible than English, but this sentence is arranged in a very natural, expressive way.

The current order:

Стоит нам повесить гирлянду, как даже обычная комната становится уютнее.

puts the trigger first and the result second, which is exactly what this construction is designed to do.

You could sometimes rearrange parts for emphasis, but this version sounds smooth and standard.

For example, moving даже or changing the order inside the second clause might shift emphasis slightly, but the original is the most neutral and natural phrasing.

It is definitely a real and common construction, and native speakers understand it easily. It can sound a little more polished or expressive than a very plain alternative, but it is not unnatural or overly literary.

A more neutral alternative would be something like:

• Когда мы вешаем гирлянду, даже обычная комната становится уютнее.
• Если повесить гирлянду, даже обычная комната становится уютнее.

But Стоит нам повесить гирлянду, как... has a nice sense of immediate effect:

the moment we do this, that happens.

So it is a very useful pattern to learn.