Jeg købte vaskepulver i supermarkedet, fordi kurven med vasketøj var fuld.

Købte is the simple past tense of at købe (to buy).

In Danish, the simple past is very commonly used for completed actions in the past, especially in straightforward narration. So Jeg købte vaskepulver... is a natural way to say I bought detergent...

Jeg har købt is the present perfect, more like I have bought. That form is also possible in Danish, but it usually connects the past action more strongly to the present moment.

So:

• Jeg købte vaskepulver = I bought detergent
• Jeg har købt vaskepulver = I have bought detergent

Vaskepulver is a compound noun, which is very common in Danish.

It is made from:

• vaske = wash / washing
• pulver = powder

Together, vaskepulver means washing powder / laundry detergent.

Danish often combines words into one single noun where English might use two words or a different expression.

Other similar examples:

• vaskemaskine = washing machine
• toothbrush-type compounds are very common in Danish too

The -et is the definite ending, so supermarkedet means the supermarket.

In Danish, instead of usually putting a separate word for the before the noun, you often add the definite ending directly to the noun.

Here:

• et supermarked = a supermarket
• supermarkedet = the supermarket

Because supermarked is a neuter noun (et-word), its definite singular ending is -et.

For the same reason as supermarkedet: kurven is the definite form, meaning the basket.

• en kurv = a basket
• kurven = the basket

Kurv is a common gender noun (en-word), so its definite singular ending is -en.

So Danish has two common singular definite endings:

• -en for many en-words
• -et for many et-words

Both types of structure are possible in Danish.

• kurven med vasketøj = the basket with laundry
• vasketøjskurven = the laundry basket

The sentence uses kurven med vasketøj, which focuses on the basket as something currently containing laundry.

A learner should know that Danish often has two ways to express this kind of idea:

1. noun + med + noun
   • en kop med te = a cup with tea
2. a compound noun
   • tekop = teacup

In this sentence, kurven med vasketøj sounds natural and clear.

Vasketøj is a noun meaning laundry / washing in the sense of clothes to be washed or that have been washed.

It is usually treated like an uncountable or mass noun, much like laundry in English.

So you normally say:

• vasketøj = laundry
• noget vasketøj = some laundry

You would not usually treat it like a normal countable singular object.

It is also another compound:

• vaske = wash
• tøj = clothes

Because fordi introduces a subordinate clause, and Danish subordinate clauses usually keep the subject before the verb.

So in:

• fordi kurven med vasketøj var fuld

the order is:

• fordi = conjunction
• kurven med vasketøj = subject
• var = verb
• fuld = complement

That is normal subordinate clause word order in Danish.

This is different from main clauses, where Danish often has verb-second word order.

For example:

• Jeg købte vaskepulver i supermarkedet.
• I supermarkedet købte jeg vaskepulver.

In both of those main clauses, the finite verb comes in the second position.

But after fordi, you normally get subordinate-clause order:

• ... fordi kurven var fuld

Because fordi introduces a subordinate clause, and Danish writing normally separates clauses with a comma.

So the comma marks the break between:

• main clause: Jeg købte vaskepulver i supermarkedet
• subordinate clause: fordi kurven med vasketøj var fuld

Comma rules in Danish are a bit different from English punctuation habits, but in a sentence like this, the comma is standard.

Both fuld and fyldt can relate to the idea of full, but they are not always used in exactly the same way.

In this sentence, fuld is the natural adjective:

• Kurven var fuld = The basket was full

Fyldt is the past participle of at fylde (to fill) and often gives a more literal sense of filled:

• Kurven var fyldt med tøj = The basket was filled with clothes

So:

• fuld = state (full)
• fyldt = more like filled

Here, var fuld is the simplest and most idiomatic choice.

In practice, it can correspond to English in the supermarket or at the supermarket, depending on context.

Danish often uses i where English might choose either in or at.

So:

• i supermarkedet literally looks like in the supermarket
• but in natural English translation, at the supermarket may also fit

This is very common with places in Danish.

Sometimes yes, but they are not always interchangeable.

• fordi = because
• da can sometimes mean since / because, especially when the reason is already known or being presented as background information

In a simple learner sentence like this, fordi is the safest and most direct choice.

So:

• Jeg købte vaskepulver, fordi kurven... = very straightforward because
• Jeg købte vaskepulver, da kurven... = possible in some contexts, but less direct for beginners

Unfortunately, you usually have to learn the gender with each noun.

In Danish, nouns commonly belong to:

• common gender: takes en
• neuter: takes et

In this sentence:

• en kurv → kurven
• et supermarked → supermarkedet

A good habit is to memorize nouns together with their article:

• en kurv
• et supermarked
• et vaskepulver is not how you normally use vaskepulver here, since it is usually treated as a mass noun

Learning the noun with en or et will make the definite forms much easier later.

Yes, the main clause can be rearranged because Danish is a verb-second language.

The original is:

• Jeg købte vaskepulver i supermarkedet...

You could also say:

• I supermarkedet købte jeg vaskepulver...

That changes the emphasis a little, putting more focus on i supermarkedet.

But after fordi, the subordinate clause normally stays:

• ... fordi kurven med vasketøj var fuld

So the biggest word-order flexibility is in the main clause, not usually in the fordi clause.