Agenten ringer spelaren.

Because in Swedish, the definite article is usually added to the end of the noun.

• agent = an agent
• agenten = the agent
• spelare = a player
• spelaren = the player

So the ending -en here means the.

Both of these nouns are common-gender (en) nouns, so their singular definite form takes this kind of ending.

Swedish usually uses a suffix instead of a separate word when saying the with a noun by itself.

So:

• the agent → agenten
• the player → spelaren

A separate definite word can appear in some other structures, especially with adjectives:

• den snabba spelaren = the fast player

But in your sentence, there is no adjective, so the definite meaning is shown just by the ending on the noun.

Swedish mainly shows this through word order, not through special noun-case endings.

In Agenten ringer spelaren:

• Agenten comes before the verb, so it is the subject
• ringer is the verb
• spelaren comes after the verb, so it is the object

So the sentence means:

• The agent calls the player

not

• The player calls the agent

Usually, nouns do not change form for subject and object in Swedish.

So:

• agenten can be the subject
• agenten can also be the object

The role is mostly understood from position in the sentence.

Pronouns do change, though:

• han = he
• honom = him

But ordinary nouns like agenten and spelaren stay the same.

Ringer is present tense.

It comes from the verb ringa, which often means to call / phone.

So:

• ringa = to call
• ringer = calls / is calling

In many basic contexts, Swedish present tense can match English calls, is calling, or sometimes a general present depending on context.

Because Swedish verbs do not usually change according to the subject the way English verbs sometimes do.

For example:

• jag ringer = I call / am calling
• du ringer = you call / are calling
• agenten ringer = the agent calls / is calling
• de ringer = they call / are calling

The verb form ringer stays the same in the present tense.

The dictionary form is ringa.

This is the infinitive, equivalent to English to call.

A few useful forms are:

• ringa = to call
• ringer = call(s) / am/is/are calling
• ringde = called
• ringt = called (supine, used in perfect forms)

So Agenten ringer spelaren uses the present-tense form of ringa.

Yes. Depending on context, ringa can also be related to ringing, like a bell or phone making a sound.

But in a sentence like Agenten ringer spelaren, the natural meaning is:

• The agent calls the player
• or The agent phones the player

The object spelaren makes it clear that someone is being contacted.

Swedish nouns belong to one of two grammatical genders:

• en words
• ett words

Spelare is an en word:

• en spelare = a player
• spelaren = the player

Agent is also an en word:

• en agent
• agenten

Unfortunately, gender often has to be learned with each noun, although some patterns can help. Many nouns referring to people are en words.

Yes. Swedish usually makes yes/no questions by putting the verb first.

Statement:

• Agenten ringer spelaren. = The agent calls the player.

Question:

• Ringer agenten spelaren? = Is the agent calling the player? / Does the agent call the player?

So the main change is verb before subject.

Not in normal Swedish if you mean The agent calls the player.

Without the definite endings, you would need the indefinite articles:

• En agent ringer en spelare. = An agent calls a player.

So compare:

• Agenten ringer spelaren. = The agent calls the player.
• En agent ringer en spelare. = An agent calls a player.

Just saying Agent ringer spelare sounds incomplete or unnatural in ordinary standard Swedish.

The difference is that spelaren adds the definite ending, so it has one extra syllable at the end.

Roughly:

• spelare ≈ SPEH-la-reh
• spelaren ≈ SPEH-la-ren

The exact pronunciation depends on accent, but the important thing for learners is:

• spelare = indefinite
• spelaren = definite

So the ending is not just spelling—it is an important part of the word.

Not normally. Even though both nouns have the same kind of definite ending, Swedish speakers understand the sentence through standard word order:

• subject + verb + object

So Agenten ringer spelaren is understood as:

• The agent calls the player

If you reverse the nouns:

• Spelaren ringer agenten

then it means:

• The player calls the agent