Jag målade väggen igår, men jag behöver en mindre pensel idag.

Målade is the past tense of måla (to paint).

So:

• måla = to paint
• målar = paint / am painting / is painting
• målade = painted

In this sentence, Jag målade väggen igår means the action happened yesterday, so Swedish uses the past tense målade.

A useful thing for English speakers to remember is that Swedish often uses a simple tense where English might sometimes use a more complicated form. Here, Swedish just says Jag målade = I painted.

Väggen means the wall, while en vägg means a wall.

Swedish usually shows definiteness by adding an ending to the noun:

• en vägg = a wall
• väggen = the wall

This is very common in Swedish. Instead of putting a separate word like the before the noun, Swedish often attaches the definite ending directly to the noun.

So:

• Jag målade väggen = I painted the wall
• Jag målade en vägg = I painted a wall

Because Swedish often puts the meaning of the at the end of the noun.

For common-gender nouns like vägg, the definite singular often ends in -en:

• en vägg = a wall
• väggen = the wall

This is one of the biggest differences from English. English says the wall, but Swedish often says just one word: väggen.

Behöver is the present tense of behöva (to need).

So:

• behöva = to need
• behöver = need / am needing

In the sentence, the speaker is talking about today:

...men jag behöver en mindre pensel idag
= ...but I need a smaller brush today

Swedish uses the present tense behöver because the need exists now.

Swedish usually does not use a special continuous form the way English does.

English often distinguishes:

• I paint
• I am painting
• I painted
• I was painting

Swedish very often uses simpler forms:

• jag målar = I paint / I am painting
• jag målade = I painted / I was painting

So in this sentence:

• Jag målade väggen igår can simply mean I painted the wall yesterday
• no extra verb is needed to express an ongoing action unless the speaker really wants to emphasize it in another way

This is very normal in Swedish.

Mindre means smaller here. It is the comparative form of liten (small).

The basic forms are:

• liten = small
• mindre = smaller
• minst = smallest

So:

• en liten pensel = a small brush
• en mindre pensel = a smaller brush

This suggests comparison: the speaker needs a brush that is smaller than the one they have now, or smaller than some other brush.

Because liten is an irregular adjective.

Many Swedish adjectives form the comparative with -are, but liten does not follow that pattern.

Compare:

• stor → större = big → bigger
• snabb → snabbare = fast → faster
• liten → mindre = small → smaller

So mindre is simply the correct comparative form that you have to learn as an irregular pattern.

Because pensel is an en-word in Swedish, and here it is indefinite singular:

• en pensel = a brush
• penseln = the brush

When you describe an indefinite singular noun, you normally keep the article:

• en liten pensel = a small brush
• en mindre pensel = a smaller brush

So en is there because the speaker means a smaller brush, not the smaller brush.

Because men (but) is a coordinating conjunction. It joins two main clauses, and after it the second clause usually keeps normal main-clause word order.

Here the two clauses are:

1. Jag målade väggen igår
2. jag behöver en mindre pensel idag

Joined together:

Jag målade väggen igår, men jag behöver en mindre pensel idag.

After men, Swedish still uses normal main-clause order: subject + verb
So:

• men jag behöver... = but I need...

This is different from some subordinate-clause patterns in Swedish, where the word order does change.

Yes, they can often move, although some positions sound more natural than others.

In the original sentence:

• Jag målade väggen igår
• ...jag behöver en mindre pensel idag

This is very natural.

You could also say:

• Igår målade jag väggen, men idag behöver jag en mindre pensel.

That version puts more emphasis on yesterday and today.

Notice what happens when igår or idag comes first in a main clause: Swedish uses verb-second word order:

• Igår målade jag väggen
• Idag behöver jag en mindre pensel

Not Igår jag målade.

So yes, they can move, but if they come first, the verb must come second.

Swedish main clauses usually follow the verb-second (V2) rule. That means the finite verb comes in the second position of the clause.

In the original sentence:

• Jag målade väggen igår
• jag behöver en mindre pensel idag

Both clauses begin with the subject jag, so the verb naturally comes next:

• Jag målade ...
• jag behöver ...

If you move another element to the front, the verb still has to stay second:

• Igår målade jag väggen
• Idag behöver jag en mindre pensel

This is a very important Swedish pattern.

Yes. Pensel is the normal word for a paintbrush or an artist’s brush.

So in this sentence:

• en mindre pensel = a smaller brush

If the context is painting a wall, pensel clearly means a paintbrush.

Swedish also has other words for different kinds of brushes, but pensel is exactly the right general word here.

Because Swedish does not capitalize the first-person singular pronoun.

So:

• English: I
• Swedish: jag

This is completely normal. Swedish only capitalizes jag at the beginning of a sentence, just like most other words.

So:

• Jag målade väggen igår
• ..., men jag behöver en mindre pensel idag

For English speakers, this is easy to notice because English treats I as special, but Swedish does not.

Normally, no. If you mention a finished time like igår (yesterday), Swedish usually prefers the simple past:

• Jag målade väggen igår = correct

Using har målat is the present perfect, and that usually fits better when the time is not specified or when the result matters now:

• Jag har målat väggen. = I have painted the wall.

But with igår, the simple past målade is the normal choice.

So the sentence uses the tense you would expect in standard Swedish.