Er hun egentlig så træt?

Because this is a yes/no question.

In Danish, yes/no questions usually put the finite verb first:

• Hun er træt. = She is tired.
• Er hun træt? = Is she tired?

So Er hun egentlig så træt? follows the normal Danish question pattern.

Here egentlig adds a nuance like actually, really, or in fact.

It often makes the question sound a bit more reflective, curious, or slightly doubtful rather than just neutral. In this sentence, it suggests something like:

• Is she actually that tired?
• Is she really that tired?

It does not always translate neatly with one single English word, because it often works as a tone word.

Here så means so or that in the sense of to that degree.

So så træt means:

• so tired
• that tired

In context, Er hun egentlig så træt? is often understood as:

• Is she really that tired?

This is different from other uses of så, which can also mean then or so in other contexts.

Yes, absolutely.

But the meaning changes a little:

• Er hun egentlig træt? = Is she actually tired?
• Er hun egentlig så træt? = Is she actually that / so tired?

Without så, you are asking whether she is tired at all.
With så, you are asking about the degree of her tiredness.

That is the usual position for this kind of adverb in Danish.

In a yes/no question, the order is often:

• verb + subject + sentence adverb + rest

So:

• Er = verb
• hun = subject
• egentlig = sentence adverb
• så træt = rest of the sentence

This placement is very natural in Danish.
A learner should get used to patterns like:

• Er du virkelig sikker?
• Har han egentlig tid?
• Kan vi måske vente?

Not exactly.

Both can sometimes be translated as really, but they are not identical:

• virkelig is stronger and more direct: really
• egentlig is often softer, more conversational, and can suggest actually, really, or when you think about it

Compare:

• Er hun virkelig så træt? = Is she really that tired?
  
  • stronger surprise or emphasis
• Er hun egentlig så træt? = Is she actually that tired?
  
  • more reflective or checking

So egentlig often sounds a bit less dramatic than virkelig.

Often, yes.

The sentence can imply that the speaker is:

• checking whether something is true
• slightly surprised
• wondering if the situation is really as serious as it seems

So it is not always a completely neutral question. Depending on tone and context, it may mean something like:

• Is she really that tired?
• Is she actually that tired?
• Is she that tired, though?

The basic statement order would be:

• Hun er egentlig så træt.

That keeps the normal Danish subject + verb order.

However, whether that exact statement sounds natural depends on context. In everyday speech, you might also hear:

• Hun er træt. = She is tired.
• Hun er virkelig træt. = She is really tired.
• Hun er så træt. = She is so tired.

So the question form is very clear and natural, but the matching statement may vary depending on what nuance you want.

Træt can be tricky for English speakers.

A rough guide:

• tr- begins with a Danish r, which is not like a strong English r
• æ sounds somewhat like the vowel in bed, but more open
• the final t is not pronounced like a strong English t
• the word also has stød in standard Danish, which gives it a kind of creaky or checked sound

A rough approximation for an English speaker is something like tret, but that is only approximate.

The most important thing is to learn the vowel æ and listen to native pronunciation several times.

Not mainly.

In English, intonation is very important for marking questions. In Danish, word order does most of that work here.

So:

• Hun er egentlig så træt. = statement
• Er hun egentlig så træt? = question

Intonation still matters for tone, attitude, and emphasis, but the fact that this is a question is shown primarily by the verb-first order.