I helgen ska hon måla dörren grå med en pensel.

Because Swedish often puts a time expression first when you want to frame the sentence with when something happens.

When that happens, Swedish uses the V2 rule: the finite verb must come in the second position.

So:

• I helgen ska hon måla dörren grå med en pensel.
• literally: This weekend will she paint...

If you start with the subject instead, the sentence becomes:

• Hon ska måla dörren grå i helgen.

Both are correct. The difference is mainly focus and style.

I helgen means this weekend or over the weekend, depending on context.

It is different from på helgen, which usually means on weekends or at the weekend in a more habitual or general sense.

Compare:

• I helgen ska hon måla dörren grå. = this specific weekend
• På helgen målar hon ofta. = she often paints on weekends

So in this sentence, i helgen refers to one particular weekend.

Ska is the present tense of skola, and in modern Swedish it is very commonly used to express:

• future meaning
• intention
• plan
• something expected to happen

So ska måla means something like:

• will paint
• is going to paint
• is supposed to paint

In this sentence, it most naturally suggests a plan or intention.

Because after modal verbs like ska, Swedish normally uses the infinitive without att.

So you get:

• ska måla
• kan måla
• vill måla
• måste måla

not:

• ska att måla

This is similar to English, where we say will paint, not will to paint.

Because grå here is not just describing the door — it tells you the result of the painting.

The structure is:

• måla + object + result adjective

So:

• måla dörren grå = paint the door gray

Here, grå is an object complement. It says what the door becomes.

If you were simply talking about a door that is already gray, you would use the adjective before the noun:

• den grå dörren = the gray door

So:

• måla dörren grå = make the door gray by painting it
• den grå dörren = the gray door

Because the adjective agrees with dörren, which is:

• singular
• common gender (en word)

So the correct form is grå.

Compare:

• måla dörren grå = a door (en word, singular)
• måla huset grått = a house (ett word, singular)
• måla dörrarna grå / gråa = the doors (plural)

So grå matches dörren.

Because the sentence is talking about a specific door: the door, not just a door.

In Swedish, the definite form is often attached to the end of the noun:

• en dörr = a door
• dörren = the door

So måla dörren grå means paint the door gray.

If it were not specific, it would be:

• måla en dörr grå = paint a door gray

Med en pensel is a prepositional phrase telling you the instrument used to do the action.

• med = with
• en pensel = a brush

So it means with a brush.

This is the normal way in Swedish to say what tool is used:

• skriva med en penna = write with a pen
• klippa med en sax = cut with scissors
• måla med en pensel = paint with a brush

Yes. Swedish allows some flexibility, but the finite verb still has to stay in second position in main clauses.

For example, all of these are possible:

• I helgen ska hon måla dörren grå med en pensel.
• Hon ska måla dörren grå med en pensel i helgen.
• Med en pensel ska hon måla dörren grå i helgen.

The basic meaning stays the same, but the emphasis changes depending on what comes first.

It can mean both.

Måla can mean:

• paint a surface, like a wall, door, or house
• paint a picture or artwork

The context tells you which meaning is intended.

In this sentence, because of dörren grå, it clearly means painting a surface a certain color:

• måla dörren grå = paint the door gray

Not:

• paint a picture of a gray door

When grå expresses the result of the action, yes, it normally comes after the object:

• måla dörren grå
• måla huset vitt
• måla väggen blå

This pattern is very common in Swedish.

If the adjective is just describing the noun and not giving the result, it goes before the noun:

• den grå dörren
• det vita huset
• den blå väggen

So the position of the adjective changes the function:

• before the noun = description
• after the object = result of the action