Matresterna står i kylskåpet.

Because Swedish very often makes compound nouns by joining words together.

Here, mat means food and rester means leftovers / remains. Together, matrester means food leftovers.

Then the ending -na is added to make it definite plural, so matresterna means the leftovers.

This is very normal in Swedish. English often uses separate words where Swedish prefers one combined word.

-na is the definite plural ending here.

So:

• en matrest = a leftover / a food remnant
• matrester = leftovers
• matresterna = the leftovers

In this sentence, the speaker is talking about specific leftovers, so Swedish uses the definite form matresterna.

Because leftovers is very often treated as a plural idea in both English and Swedish.

The singular matrest exists, but in everyday life people usually talk about matrester because there is normally more than one bit of leftover food, or because the food is thought of as a collection.

So matresterna is the most natural way to say the leftovers.

In Swedish, the is often not a separate word. Instead, it is attached to the noun as an ending.

So:

• matresterna = the leftovers
• kylskåpet = the fridge

This is one of the biggest differences from English. Swedish often puts definiteness on the end of the noun instead of using a separate article.

Because kylskåp is a neuter noun in Swedish: ett kylskåp = a fridge.

For many neuter nouns, the definite singular ending is -et.

So:

• ett kylskåp = a fridge
• kylskåpet = the fridge

That is why the sentence has i kylskåpet = in the fridge.

Swedish often uses special verbs for the position of things instead of the general verb to be.

The main ones are:

• stå = stand
• ligga = lie
• sitta = sit

So instead of simply saying that something is somewhere, Swedish often says how it is positioned.

That is why står appears here.

English usually just says The leftovers are in the fridge, but Swedish prefers a more specific positional verb.

Good question. In Swedish, stå is often used when something is understood as being in a container that stands upright, such as:

• a bowl
• a box
• a pot
• a food container

So Matresterna står i kylskåpet usually suggests the leftovers are in some container that is standing in the fridge.

It does not necessarily mean the food itself is physically standing upright. It is more about how the item is conceptualized.

Sometimes, yes, but it would suggest a different way of imagining the leftovers.

• står suggests they are in a container standing in the fridge
• ligger suggests they are lying there more directly, perhaps on a plate, in a bag, or just thought of as lying somewhere

So both can be possible depending on context, but står is very natural if the leftovers are in a typical food container.

Because the leftovers are inside the fridge, not on top of it.

In Swedish:

• i = in / inside
• på = on

So:

• i kylskåpet = in the fridge
• på kylskåpet = on the fridge

Since a fridge is an enclosed space, i is the natural choice.

This sentence has very normal Swedish word order:

• Matresterna = subject
• står = verb
• i kylskåpet = place expression

So it follows the basic pattern:

subject + verb + place

Nothing unusual is happening here.

Yes. That sentence is also natural, but it means something slightly different in focus.

• Matresterna står i kylskåpet focuses on where the leftovers are
• Det finns matrester i kylskåpet focuses on the existence of leftovers in the fridge

So both are correct, but they are used in slightly different situations.

A natural indefinite version would be:

Det står matrester i kylskåpet.

That means something like There are leftovers in the fridge.

Notice that Swedish often uses det står in this kind of sentence when talking about something being located somewhere.

You could also say:

Det finns matrester i kylskåpet.

That is also very common.

It is another compound noun:

• kyl- relates to cooling
• skåp means cupboard / cabinet

So kylskåp is literally something like cooling cabinet, which is the Swedish word for fridge.

This is very typical Swedish word-building. Many everyday nouns are compounds like this.

A rough guide for an English speaker is:

MAHT-rest-er-na stor ee SHYL-sko-pet

A few important points:

• å in står is a long vowel, somewhat like the vowel in British more, though not exactly the same
• ky in kylskåpet is tricky for English speakers; the y is a front rounded vowel that does not exist in normal English
• sj in kylskåpet is not present, but the k before y is pronounced like a soft sh-like sound in standard Swedish: shyl-

Pronunciation varies somewhat by region, but that is a useful starting point.