Hun vil underskrive kontrakten i aften, hvis alt ser rigtigt ud.

Vil often corresponds to English will for the future, but it can also suggest intention or willingness depending on context.

In this sentence, Hun vil underskrive kontrakten i aften most naturally means:

• She will sign the contract tonight
• or She intends to sign the contract tonight

So it is mainly expressing a future action, with a sense of intention.

Because after a modal verb like vil, Danish uses the infinitive form of the main verb.

So:

• vil = modal verb
• underskrive = infinitive

This works much like English:

• She will sign
• Hun vil underskrive

Other common Danish modal verbs that work the same way are:

• kan = can
• skal = shall / must / will
• må = may / must
• bør = should

Kontrakten means the contract, while en kontrakt means a contract.

Danish usually adds the definite article to the end of the noun:

• en kontrakt = a contract
• kontrakten = the contract

So the ending -en is the equivalent of English the for this common-gender noun.

It can mean both, depending on context.

• i aften = this evening / tonight

In English, we often choose between this evening and tonight based on style or context, but Danish commonly uses i aften for both ideas.

Examples:

• Vi ses i aften = See you tonight / this evening
• Hun kommer i aften = She is coming tonight

Hvis means if and introduces a condition.

So:

• hvis alt ser rigtigt ud = if everything looks right

This tells us that signing the contract depends on that condition being met.

A learner may compare hvis with om, but here hvis is correct because this is a real condition, not an indirect yes/no question.

Se ud is a very common Danish verb expression meaning:

• look
• appear
• seem

So:

• alt ser rigtigt ud = everything looks right

The ud is a particle that belongs with ser, but in a normal main or subordinate clause it is often placed later in the sentence.

Compare:

• Det ser godt ud = It looks good
• Alt ser rigtigt ud = Everything looks right

So you should learn se ud as a unit, even though the two parts may be separated.

Here rigtigt is the neuter form, matching alt.

• alt = everything
• grammatically, alt is neuter singular

When an adjective is used with a neuter singular subject in this kind of structure, it often takes -t:

• Det ser godt ud
• Alt ser rigtigt ud

So rigtigt is correct because it agrees with alt.

Ser is present tense of at se.

Danish, like English, often uses the present tense in an if-clause even when the overall meaning is future.

So:

• hvis alt ser rigtigt ud = if everything looks right

Compare English:

• If everything looks right, she will sign it tonight

You do not normally use a future form after if here.

The sentence has:

1. a main clause
   
   • Hun vil underskrive kontrakten i aften
2. a subordinate clause introduced by hvis
   
   • hvis alt ser rigtigt ud

A key point is that Danish subordinate clauses usually keep the subject before the verb in a straightforward way:

• alt ser rigtigt ud

If you put the hvis clause first, the main clause would show inversion:

• Hvis alt ser rigtigt ud, vil hun underskrive kontrakten i aften.

Notice:

• normal order: Hun vil ...
• after the fronted clause: vil hun ...

That is a very common Danish word-order pattern.

The comma before hvis is common, but whether it is strictly required depends on the comma system being used in Danish.

In practice:

• many learners will see a comma before subordinate clauses like this
• in modern Danish, the start comma before a subordinate clause can be optional

So this sentence with a comma is perfectly normal:

• Hun vil underskrive kontrakten i aften, hvis alt ser rigtigt ud.

You may also sometimes see:

• Hun vil underskrive kontrakten i aften hvis alt ser rigtigt ud.

In this sentence, underskrive clearly means sign in the sense of signing a document.

That is its most common meaning in everyday use:

• underskrive en kontrakt = sign a contract
• underskrive et brev = sign a letter

English learners should be careful not to overextend meanings from English. Here it is specifically about putting your signature on something.

Yes, skrive under can also mean sign, and skrive under på kontrakten is understandable.

However, underskrive kontrakten is more direct and often sounds more formal or standard, especially in legal or business contexts.

So for this sentence, underskrive kontrakten is a very natural choice.

Danish normally requires an explicit subject in ordinary sentences.

So you need:

• Hun vil underskrive ...

Unlike some languages, Danish does not usually omit the subject just because it is understood from the verb. In that way, it behaves much like English.

Yes. Danish is fairly flexible about where time expressions go, as long as the word order rules are followed.

These are all natural or possible, with slightly different emphasis:

• Hun vil underskrive kontrakten i aften, hvis alt ser rigtigt ud.
• I aften vil hun underskrive kontrakten, hvis alt ser rigtigt ud.
• Hvis alt ser rigtigt ud, vil hun underskrive kontrakten i aften.

The basic meaning stays the same, but the first element in the sentence often gets extra focus.