Jag såg henne nyss vid dörren med en bricka i händerna.

Because henne is the object form of hon.

• hon = she (subject)
• henne = her (object)

In this sentence:

• Jag = subject
• såg = verb
• henne = direct object

So Swedish works like English here:

• She saw me = Hon såg mig
• I saw her = Jag såg henne

Såg is the past tense of se (to see).

This is an irregular verb:

• infinitive: se = to see
• present: ser = see / sees
• past: såg = saw
• supine: sett = used in perfect tenses

So:

• Jag ser henne = I see her
• Jag såg henne = I saw her

Nyss usually means just now, a moment ago, or recently.

It refers to something that happened a very short time before now. In this sentence, it tells you when the speaker saw her.

Examples:

• Jag åt nyss. = I just ate.
• Han gick nyss. = He just left.

So Jag såg henne nyss is like I saw her just now / a moment ago.

Yes, nyss can often move around a bit, though some positions sound more natural than others depending on emphasis.

Here:

• Jag såg henne nyss vid dörren med en bricka i händerna.

This is natural, and nyss modifies the whole event: I saw her recently / just now.

Other possible wordings include:

• Jag såg henne vid dörren nyss.
• Nyss såg jag henne vid dörren.
  This sounds more marked, with extra emphasis on just now.

Swedish adverbs are often flexible, but moving them can change the rhythm or focus of the sentence.

Vid dörren means by the door or at the door.

The preposition vid is commonly used for being next to, by, or at something.

• vid dörren = by the door / at the door
• vid bordet = by the table
• vid fönstret = by the window

By contrast:

• i dörren can mean in the doorway or literally in the door, depending on context
• på dörren means on the door

So vid dörren is the natural choice if the person was standing near the door.

Dörren is the definite form: the door.

Swedish often uses the definite form when the thing is understood from the situation or is a specific one in context.

• en dörr = a door
• dörren = the door

So vid dörren suggests a particular door that is identifiable in the situation, even if it has not been mentioned earlier. This is very natural in Swedish, just as English often says at the door rather than at a door.

Because the sentence introduces it as a tray, not the tray.

• en bricka = a tray
• brickan = the tray

If the tray were already known from the context, brickan could be used. But here the speaker is simply describing what she was holding, so en bricka is the normal choice.

Literally, it means:

• med = with
• en bricka = a tray
• i händerna = in the hands

So word-for-word, it is something like with a tray in the hands.

In natural English, you would usually say:

• with a tray in her hands
• holding a tray

This phrase describes her appearance or what she was carrying when the speaker saw her.

This is a very common Swedish pattern with body parts.

Swedish often uses the definite form of the body part without a possessive when the owner is obvious:

• i handen = in the hand
• i händerna = in the hands
• på huvudet = on the head
• i ögonen = in the eyes

So med en bricka i händerna is idiomatic Swedish.

Using i hennes händer is possible, but it is less natural here unless you want special emphasis, contrast, or clarity.

Using i sina händer is also possible in some contexts, but here it sounds heavier than necessary. Swedish usually prefers the simpler body-part construction when the owner is obvious from context.

Normally, it is understood to mean her hands.

In the sentence:

• Jag såg henne ... med en bricka i händerna

the most natural reading is that she had the tray in her hands.

Swedish often leaves this implicit when it is clear from context. In theory, some ambiguity is possible, but in ordinary use most people would understand that the tray was in her hands, not the speaker’s.

It mainly describes henne — in other words, it tells us what state or appearance she had when the speaker saw her.

So the natural interpretation is:

• I saw her, and she was standing there with a tray in her hands.

This kind of phrase can sometimes feel structurally ambiguous, but real-world meaning usually makes the intended reading clear.

If you wanted to make the description even more obviously about her, Swedish could also rephrase it, for example:

• Jag såg henne stå vid dörren med en bricka i händerna.

That more explicitly says that she was the one standing there with the tray.

Because händerna means the hands.

• hand = hand
• händer = hands
• händerna = the hands

A tray is normally held with two hands, so the plural is natural here. Swedish is simply describing the tray as being in her hands.

Yes. Even if the meaning is already known, it helps to see how the Swedish maps onto natural English.

Possible natural translations include:

• I saw her just now by the door with a tray in her hands.
• I just saw her by the door, holding a tray.
• A moment ago I saw her standing by the door with a tray in her hands.

The exact English wording depends on how literal or natural you want to be, but the Swedish structure is perfectly normal.

Yes. It is very normal.

The sentence is built like this:

• Jag = subject
• såg = verb
• henne = object
• nyss = time adverb
• vid dörren = place phrase
• med en bricka i händerna = descriptive phrase

Swedish often adds details after the main verb and object in a fairly straightforward way, especially in neutral statements like this one. So the sentence sounds natural and idiomatic.