Hun kjøper appelsiner og yoghurt til frokost.

Kjøper is the present tense of å kjøpe (to buy).

In Norwegian, verbs are much simpler than in English because they do not change for the subject:

• jeg kjøper = I buy / I am buying
• du kjøper = you buy / you are buying
• hun kjøper = she buys / she is buying

So kjøper can mean either buys or is buying, depending on context.

Norwegian normally uses Subject – Verb – Object word order in ordinary statements, just like English:

• Hun = subject
• kjøper = verb
• appelsiner og yoghurt = object

So:

• Hun kjøper appelsiner og yoghurt.
  = She buys oranges and yogurt.

That is the standard, natural word order.

Norwegian often leaves out some where English may include it.

So:

• Hun kjøper appelsiner literally = She buys oranges
• Hun kjøper yoghurt literally = She buys yogurt

In natural English, you might translate this as She buys some oranges and yogurt, but Norwegian usually does not need an extra word for some in this kind of sentence.

Because they are being treated differently as nouns:

• appelsiner = oranges → countable, plural
• yoghurt = yogurt → often treated as an uncountable mass noun

This is similar to English:

• oranges
• yogurt

If you wanted to talk about individual yogurts, Norwegian could also use a countable form in the right context, but here yoghurt is just the general food item.

The singular is appelsin.

Common forms are:

• en appelsin = an orange
• appelsinen = the orange
• appelsiner = oranges
• appelsinene = the oranges

So in the sentence, appelsiner is the indefinite plural.

Til frokost means for breakfast.

Here, til is the preposition Norwegian commonly uses in this expression:

• til frokost = for breakfast
• til lunsj = for lunch
• til middag = for dinner

So Hun kjøper appelsiner og yoghurt til frokost means she is buying them to have for breakfast.

After til, Norwegian often uses meal words without an article when speaking generally:

• til frokost = for breakfast
• til lunsj = for lunch
• til middag = for dinner

This is similar to English, where we usually say for breakfast, not for a breakfast.

If you said en frokost, it would sound like a breakfast as a specific event or meal, which is not the idea here.

Og means and. It connects the two things being bought:

• appelsiner og yoghurt = oranges and yogurt

It works just like English and.

Yes. Norwegian nouns have grammatical gender, even if the sentence does not show it directly.

These are normally:

• en appelsin
• en yoghurt
• en frokost

So they are commonly treated as common gender nouns.

Knowing the article helps you learn the noun properly, even when the article is not used in the sentence.

The past tense of å kjøpe is kjøpte.

So the sentence becomes:

• Hun kjøpte appelsiner og yoghurt til frokost.
  = She bought oranges and yogurt for breakfast.

Notice that only the verb changes:

• kjøper → kjøpte

You usually put ikke after the verb in a main clause:

• Hun kjøper ikke appelsiner og yoghurt til frokost.
  = She does not buy oranges and yogurt for breakfast.

So the pattern is:

• subject + verb + ikke + rest

The hardest part for many English speakers is kjø.

A rough guide:

• kj before front vowels is often a soft sound, somewhat like a very light sh/hy sound depending on dialect
• ø is a rounded vowel that does not exist in standard English

So kjøper is roughly like SHUR-per or HYUR-per, but that is only approximate.

It is best to listen to native audio, because both kj and ø are sounds English speakers usually need to train specifically.

Yes. Yoghurt is very common, but you may also see yogurt.

Both spellings are used, though yoghurt is especially common in many contexts. A learner should recognize both.