Återkopplingen på prestationen borde ha varit konstruktiv.

Because Swedish often uses the definite form when talking about a specific thing already understood from the context.

• återkoppling = feedback
• återkopplingen = the feedback

In this sentence, it means a particular piece of feedback, not feedback in general.

Also note that återkoppling is an en-word, so the definite singular ending is -en:

• en återkoppling
• återkopplingen

Even though English sometimes says just feedback, Swedish often prefers the definite form where English may not.

In Swedish, återkoppling på is a very common collocation. It means feedback on/about something.

So:

• återkoppling på prestationen = feedback on the performance

You may sometimes hear other prepositions in related contexts, but på is the most natural choice here.

Compare:

• återkoppling på arbetet = feedback on the work
• återkoppling på uppgiften = feedback on the assignment

So this is something you mostly learn as a fixed pattern: återkoppling på något.

Here, prestationen means the performance/achievement, referring to a specific performance already known in context.

• en prestation = a performance, an achievement
• prestationen = the performance, the achievement

Swedish often uses the definite form when both speaker and listener know which thing is being discussed. If this were more general or indefinite, you could say:

• återkoppling på en prestation = feedback on a performance

But in your sentence, it is clearly a particular performance.

Borde ha varit is the Swedish way to say should have been.

Breakdown:

• borde = should / ought to
• ha = have
• varit = been

So the structure is:

borde + ha + supine

With vara, the supine form is varit.

Examples:

• Det borde ha varit lättare. = It should have been easier.
• Hon borde ha varit tydligare. = She should have been clearer.

This structure talks about something in the past that was expected, preferable, or appropriate, but apparently was not the case.

Because after ha, Swedish uses the supine form, not the infinitive.

For the verb vara:

• infinitive: vara
• present: är
• past: var
• supine: varit

Since the sentence has ha, you need:

• ha varit

Not:

• ha vara ❌

This is similar to English have been, not have be.

Because it agrees with återkopplingen, which is:

• singular
• definite
• an en-word

After verbs like vara, predicate adjectives usually match the noun in gender and number. For a singular en-word, the basic form is used:

• återkopplingen ... var konstruktiv

Compare:

• ett svar var konstruktivt = a response was constructive
• kommentarerna var konstruktiva = the comments were constructive

So:

• konstruktiv = singular common gender
• konstruktivt = singular neuter
• konstruktiva = plural

Both are possible, but they are slightly different in style.

• återkoppling is the standard Swedish word.
• feedback is also widely used in spoken and professional Swedish, especially in workplaces, schools, and business settings.

So you might hear:

• Återkopplingen på prestationen borde ha varit konstruktiv.
• Feedbacken på prestationen borde ha varit konstruktiv.

The first sounds more fully Swedish and often a bit more formal or careful. The second sounds more modern, international, and conversational in many contexts.

Not always. Prestation can mean several related things depending on context:

• performance
• achievement
• effort/result
• sometimes something like output

In this sentence, it most likely means the performance or the person’s performance.

Be careful not to assume it always matches English performance perfectly. In Swedish, prestation often focuses on what someone achieved or how well they did.

Examples:

• en bra prestation = a good performance / a strong effort
• hans prestation i matchen = his performance in the match

Not if you want the same meaning.

• borde ha varit = should have been
• skulle ha varit = would have been

These are different ideas.

Your sentence says that the feedback was expected or supposed to be constructive:

• Det borde ha varit konstruktivt.

If you say:

• Det skulle ha varit konstruktivt,
  that means it would have been constructive, usually under some condition, stated or implied.

So borde expresses obligation, appropriateness, or expectation.
Skulle expresses conditional meaning.

Yes, but the meaning changes.

• borde vara konstruktiv = should be constructive
  This is more general or present-oriented. It can describe what is appropriate in principle.

• borde ha varit konstruktiv = should have been constructive
  This refers to a past situation and usually suggests that the feedback was not constructive.

So:

• Återkopplingen på prestationen borde vara konstruktiv.
  = Feedback on the performance should be constructive.

• Återkopplingen på prestationen borde ha varit konstruktiv.
  = The feedback on the performance should have been constructive.

This sentence follows normal Swedish main-clause word order.

Structure:

• Återkopplingen på prestationen = subject
• borde = finite verb
• ha varit = infinitive + supine
• konstruktiv = predicate adjective

So the pattern is basically:

Subject + finite verb + infinitive/supine + complement

If you move another element to the front, Swedish still keeps the finite verb in second position:

• Återkopplingen på prestationen borde ha varit konstruktiv.
• På prestationen borde återkopplingen ha varit konstruktiv.

That second version is grammatical, but less neutral. The original sentence is the most natural.

A rough guide is:

OH-ter-kop-ling-en

A few pronunciation points:

• å sounds roughly like the vowel in British English more for many learners, though not exactly.
• The stress is mainly on the first syllable: Å-ter-...
• g in -ing- is pronounced as a hard g here, not like English j.
• The ending -en is lightly pronounced.

If you want to sound more natural, focus especially on:

• the long å
• the clear k sounds
• the rhythm of the whole word rather than pronouncing each letter separately

It sounds fairly neutral to formal, especially because of words like återkoppling, prestation, and konstruktiv. It would fit well in:

• workplace discussions
• educational feedback
• professional writing
• HR or coaching contexts

In more casual speech, people might choose simpler or more colloquial wording, such as:

• Feedbacken borde ha varit mer konstruktiv.
• De borde ha gett mer konstruktiv feedback på prestationen.

So the original sentence is natural, but slightly polished in tone.