Cyklen vil blive repareret på værkstedet i morgen.

Because cyklen is the definite singular form: the bicycle.

• en cykel = a bicycle
• cyklen = the bicycle

In Danish, the definite article is usually added to the end of the noun as a suffix, instead of being a separate word like the in English.

Vil blive repareret means will be repaired.

It is made up of:

• vil = will
• blive = be / become
• repareret = repaired

So the structure is:

• vil
  • blive
    • past participle
      = future passive

This is a very common way to form the passive in Danish when talking about the future.

After modal verbs like vil, Danish normally uses the bare infinitive, without at.

So you say:

• vil blive
• kan reparere
• skal arbejde

not:

• vil at blive

This is similar to English, where we say will be repaired, not will to be repaired.

Because repareret is the past participle of reparere, and the passive with blive needs a past participle.

• reparere = to repair
• repareret = repaired

So:

• blive repareret = be repaired

This works much like English:

• to repair
• repaired

In this sentence, på værkstedet is the natural idiomatic choice and means at the workshop / at the repair shop.

Danish often uses på for places understood as workplaces, institutions, or service locations.

• på værkstedet = at the workshop / at the garage

If you said i værkstedet, it would sound more like you are emphasizing being inside the room/building physically.

So:

• Cyklen vil blive repareret på værkstedet = the bicycle will be repaired at the workshop

is the most natural wording here.

Because værksted is a neuter noun.

• et værksted = a workshop
• værkstedet = the workshop

So the definite ending for this noun is -et.

Compare:

• en cykel → cyklen
• et værksted → værkstedet

That is a very normal Danish word order.

In a neutral main clause, Danish often puts adverbials like place and time toward the end:

• Cyklen
  • vil blive repareret
    • på værkstedet
      • i morgen

So the order here is roughly:

• subject
• verb(s)
• place
• time

But Danish is flexible. You can also front i morgen for emphasis:

• I morgen vil cyklen blive repareret på værkstedet.

That would mean the same thing, but with more focus on tomorrow.

Yes, Danish also has an -s passive, and a learner may wonder about that.

For example, you might see:

• Cyklen vil repareres på værkstedet i morgen.

This also means The bicycle will be repaired at the workshop tomorrow.

A rough comparison:

• vil blive repareret = future passive with blive
• vil repareres = future passive with -s

Both are possible, but blive + past participle is often especially clear and common when talking about an event happening to something.

Not always. Danish has several ways to talk about the future.

This sentence uses:

• vil = will

But Danish also often uses the present tense for future meaning if the time is clear:

• Cyklen bliver repareret på værkstedet i morgen.

That can also mean The bicycle is being / will be repaired at the workshop tomorrow, depending on context.

Another possibility is:

• Cyklen skal repareres på værkstedet i morgen.

That often suggests it is supposed to / is scheduled to be repaired.

So the choice depends on nuance:

• vil = will
• skal = is supposed to / is to
• present tense + time expression = often natural future in Danish

The basic structure is:

• Cyklen = subject
• vil = finite verb
• blive repareret = passive verb phrase
• på værkstedet = place
• i morgen = time

So the full pattern is:

Subject + finite verb + infinitive/passive elements + place + time

This is a very useful pattern to recognize in Danish main clauses. The finite verb, here vil, comes early in the sentence, which is a key feature of Danish word order.