Hvis du er i tvivl, kan læreren vise dig det rette svar.

Hvis means if. It introduces a condition:

• Hvis du er i tvivl = If you are in doubt / If you're unsure

So the first part is a conditional clause, and the second part tells you what can happen in that situation.

I tvivl is a fixed expression meaning in doubt, unsure, or uncertain.

Danish says:

• at være i tvivl = to be in doubt / to be unsure

So:

• du er i tvivl = you are unsure

This works much like English to be in doubt. You should learn i tvivl as a set phrase rather than translating each word separately every time.

This is because of normal Danish V2 word order in main clauses.

When a sentence begins with something other than the subject, the finite verb usually comes second. Here, the sentence starts with the Hvis clause:

• Hvis du er i tvivl, ...

After that, the main clause begins, and the verb comes before the subject:

• kan læreren vise dig det rette svar

So the pattern is:

• fronted element: Hvis du er i tvivl
• finite verb: kan
• subject: læreren

This is very common in Danish.

Kan is the present tense of kunne and usually means can, is able to, or sometimes may depending on context.

Here it means something like:

• can show
• will be able to show
• possibly even may show in a practical sense

So:

• kan læreren vise dig ... = the teacher can show you ...

Læreren means the teacher. The ending -en is the definite article attached to the noun.

Compare:

• en lærer = a teacher
• læreren = the teacher

So the sentence is talking about a specific teacher, or the teacher in the situation being discussed.

Because dig is the object form of you, while du is the subject form.

Compare:

• du = you as subject
• dig = you as object

In this sentence:

• du is the subject of er in Hvis du er i tvivl
• dig is the person being shown something in vise dig det rette svar

So:

• vise dig = show you

After vise (show), Danish can place the indirect object before the direct object:

• vise dig det rette svar = show you the correct answer

Here:

• dig = indirect object
• det rette svar = direct object

This is similar to English show you the answer.

You could think of it as:

• show
  • someone
    • something

This is an important Danish pattern.

When a noun phrase is definite and has an adjective before the noun, Danish usually uses:

• a separate definite article
• the adjective in its weak form
• the noun without the suffixed definite ending

So:

• det rette svar = the correct answer

Not:

• det rette svaret

Compare:

• et svar = an answer
• svaret = the answer
• det rette svar = the correct answer

This is a very common structure in Danish.

Because the adjective is in the weak/definite form.

The base adjective is ret here, meaning correct/right. But when it comes after a definite article like det, Danish normally uses the -e form:

• et ret svar = a correct answer
• det rette svar = the correct answer

So rette is not a different word here; it is the form the adjective takes in this definite noun phrase.

Often, yes. Both can mean the correct answer.

Very roughly:

• rigtig often means correct in a general everyday sense
• ret can also mean correct/right, and in some contexts may sound a bit more formal or precise

In many situations, both would be understood naturally. In this sentence, det rette svar sounds perfectly normal.

Because Hvis du er i tvivl is a subordinate clause placed before the main clause.

So the sentence is divided like this:

• Hvis du er i tvivl,
• kan læreren vise dig det rette svar.

In standard Danish writing, commas are used to separate these clause parts.

Yes. You could also say:

• Læreren kan vise dig det rette svar, hvis du er i tvivl.

This means the same thing: The teacher can show you the correct answer if you are unsure.

The main difference is emphasis and word order:

• starting with Hvis du er i tvivl highlights the condition first
• starting with Læreren kan ... presents the main statement first

Both are natural.