Jeg har tillid til hende, fordi hun altid er opmærksom på detaljer og holder sine aftaler.

In this sentence, Danish uses the fixed expression at have tillid til nogen, which literally means to have trust in someone.

So:

• Jeg har tillid til hende = I trust her
• literally: I have trust in her

Danish also has the verb at stole på, which also means to trust:

• Jeg stoler på hende = I trust her

Both are natural, but har tillid til can sound a bit more like confidence in someone’s reliability, judgment, or character.

Because Danish distinguishes between subject and object forms of pronouns here.

• hun = she → subject form
• hende = her → object form

So:

• Jeg har tillid til hende
  After the preposition til, you need the object form, so hende is correct.

• fordi hun altid er opmærksom ...
  Here she is the subject of the clause, so hun is correct.

This works much like English:

• I trust her
• because she is always attentive

This is because fordi introduces a subordinate clause, and Danish word order changes in subordinate clauses.

In a main clause, the verb usually comes before sentence adverbs like altid:

• Hun er altid opmærksom.

But in a subordinate clause, the adverb usually comes before the finite verb:

• fordi hun altid er opmærksom

So the pattern is:

• main clause: subject + verb + adverb
• subordinate clause: subject + adverb + verb

That is why hun altid er is correct here.

Opmærksom på means attentive to, aware of, or careful about, depending on context.

In this sentence:

• opmærksom på detaljer = attentive to details

It is a common combination:

• at være opmærksom på noget = to pay attention to something / to be aware of something

The preposition på belongs naturally with opmærksom in this meaning, so it is something worth learning as a set phrase.

Because detaljer is being used in a general sense.

• på detaljer = to details
• in natural English: to detail or to details, depending on how you phrase it

This is similar to English when we speak generally:

• She pays attention to details

You do not need an article because it is not referring to specific details already identified in the conversation. It just means details in general.

It means keeps her agreements, but in natural English we would usually say:

• keeps her promises
• keeps her word
• follows through on what she says she will do

The verb holde often means hold, but in many expressions it has a broader meaning. Here:

• at holde en aftale = to keep an agreement / stick to an arrangement

So hun holder sine aftaler describes someone reliable who does what they said they would do.

Because sine is the reflexive possessive form, used when the possessor is the subject of the clause.

Here, the subject is hun, and the agreements belong to that same person. So Danish uses:

• hun holder sine aftaler = she keeps her own agreements

If you said hendes aftaler, it would usually mean someone else’s agreements, not her own.

Compare:

• Hun holder sine aftaler. = She keeps her own agreements.
• Hun holder hendes aftaler. = She keeps her agreements.
  This usually suggests her refers to another woman.

This is a very important Danish distinction.

Literally, aftaler often means agreements or arrangements, and in some contexts it can also mean appointments.

But in this sentence, the most natural sense is closer to:

• promises
• commitments
• things she has agreed to do

So holder sine aftaler is really about reliability, not just about showing up for appointments.

The sentence is in the present tense:

• Jeg har
• hun er
• holder

But the meaning is not just about right now. It expresses a general, ongoing truth:

• I trust her
• because she is always attentive to details
• and she keeps her commitments

So the present tense here describes a stable characteristic or repeated behavior, not a temporary action happening at this moment.

Yes, absolutely.

• Jeg stoler på hende = I trust her
• Jeg har tillid til hende = I trust her / I have confidence in her

Both are correct and natural.

A rough difference is:

• stole på often feels a little more direct and everyday
• have tillid til can sound slightly more formal or more focused on confidence in someone’s reliability or ability

In many situations, they are interchangeable. The original sentence sounds very natural because the rest of the sentence explains why the speaker has confidence in her.

Because opmærksom is a predicate adjective after er, and here it matches hun, which is singular and not neuter.

Danish adjective forms often work like this:

• common gender singular: opmærksom
• neuter singular: opmærksomt
• plural: opmærksomme

Since the subject is hun, the basic form opmærksom is the right one:

• hun er opmærksom

If the subject were plural, you would say:

• de er opmærksomme = they are attentive