Hvad siger du til det?

Not really. Although sige usually means to say, the expression sige til noget in this kind of sentence means something more like:

• what do you think about it?
• how do you feel about it?
• what do you say to that?

So Hvad siger du til det? is an idiomatic way of asking for someone's reaction, opinion, or response.

Because Danish main clauses follow the V2 rule: the finite verb usually comes in the second position.

Here, Hvad is placed first, so the verb siger must come next:

• Hvad siger du til det?

Not:

• Hvad du siger til det? ❌

That wrong version would sound like an embedded clause structure, not a normal direct question.

In this expression, til is part of the fixed phrase sige til.

By itself, til often means to, but here you should learn sige til noget as a unit. In Hvad siger du til det?, til det means about that / to that / in response to that, depending on context.

So til is not being used in a simple literal direction sense.

Because det is the common pronoun for it/that when referring to something general, previously mentioned, or a whole idea/situation.

Use det when talking about:

• a statement
• a suggestion
• an event
• an abstract idea

For example, if someone proposes something, you can say:

• Hvad siger du til det? = What do you think about that?

Den would usually refer back to a specific common-gender noun, while det often refers to a neuter noun or to an entire idea/situation.

It is neutral and very common in everyday Danish. It is not especially formal.

Because it uses du, it is directed to one person in the normal informal Danish way. Modern Danish uses du almost all the time, even in many situations where other languages might use a formal pronoun.

So this sentence is perfectly natural in ordinary conversation.

Yes. The exact English translation depends on context.

It can mean:

• asking for an opinion: What do you think about it?
• asking for a reaction: What do you say to that?
• asking whether someone agrees to a proposal: How does that sound to you?

So the Danish sentence is flexible, and English may translate it in different ways.

Yes.

The verb is:

• infinitive: sige = to say
• present tense: siger = say / says

In this sentence, siger is present tense because the question is asking for someone's current reaction:

• Hvad siger du til det?

Literally, that is something like What say you to that?, though that is not natural modern English.

A learner-friendly approximation is:

• hvad ≈ vad
• siger ≈ sigh-er or sai-er (with a very light g or almost none in many pronunciations)
• du ≈ doo
• til ≈ teel
• det ≈ deh or a very soft theh depending on accent

A rough full approximation:

• Vad sai-er du teel deh?

A few pronunciation notes:

• hvad often loses the h sound in normal speech.
• The g in siger is often very weak.
• det often has a soft d sound, not a hard English d.

Yes, very naturally.

For example, if someone says:

• Skal vi tage på stranden i morgen? = Shall we go to the beach tomorrow?

You might reply to a third person, or ask someone else:

• Hvad siger du til det? = What do you think about that?

It is commonly used when asking whether someone likes an idea, accepts a plan, or has any objections.

Yes. Some common alternatives are:

• Hvad synes du om det? = What do you think about it?
• Hvad mener du om det? = What is your opinion about it?
• Hvordan lyder det? = How does that sound?
• Er du med på den? = Are you on board with that? / Does that work for you?

Compared with these, Hvad siger du til det? often feels especially natural when asking for someone's reaction to a proposal or situation.

Yes. You can replace det with another noun phrase depending on what you are reacting to.

Examples:

• Hvad siger du til planen? = What do you think of the plan?
• Hvad siger du til idéen? = What do you think of the idea?
• Hvad siger du til at tage af sted nu? = What do you say to leaving now?

So the pattern is:

• Hvad siger du til + noun / pronoun / infinitive phrase?

Yes, very common.

This pattern is used to suggest an action:

• Hvad siger du til at spise ude? = What do you say to eating out?
• Hvad siger du til at mødes i morgen? = What do you say to meeting tomorrow?

In that structure, at + verb works like to + verb / -ing in English depending on how you translate it.

So Hvad siger du til det? and Hvad siger du til at ...? are closely related patterns.