Hvis det ikke regner, kører jeg på cykel til stationen.

Because Danish follows the V2 rule in main clauses: the finite verb normally comes in second position.

Here, the whole Hvis det ikke regner clause comes first. After that, the main clause must begin with the verb:

• Hvis det ikke regner, kører jeg på cykel til stationen.

So the order is:

• subordinate clause
• verb
• subject

This is why you get kører jeg, not jeg kører.

Compare:

• Jeg kører på cykel til stationen. = normal main clause
• Hvis det ikke regner, kører jeg på cykel til stationen. = main clause after an opening clause, so inversion happens

In Danish, weather verbs often use det as a dummy subject, just like English uses it:

• Det regner. = It is raining.

So det does not refer to a specific thing. It is simply required by the grammar.

Other similar examples:

• Det sner. = It is snowing.
• Det blæser. = It is windy / It is blowing.

Usually, yes. Hvis is the normal word for if in conditions:

• Hvis det regner ... = If it rains ...

A useful comparison is hvis vs når:

• hvis = if (condition, maybe it happens, maybe not)
• når = when (something expected or repeated)

So:

• Hvis det ikke regner, kører jeg på cykel til stationen.
  = If it doesn’t rain, I bike to the station.

But:

• Når det ikke regner, kører jeg på cykel til stationen.
  = When it isn’t raining / Whenever it doesn’t rain, I bike to the station.

English sometimes uses if and when in ways that overlap, but Danish keeps this distinction fairly clearly.

Danish often uses the present tense for both:

• general habits
• near future
• conditional future meaning

So Hvis det ikke regner, kører jeg på cykel til stationen can mean:

• If it doesn’t rain, I bike to the station
  or
• If it doesn’t rain, I’ll bike to the station

The exact meaning depends on context.

This is very normal in Danish, and it works a lot like English present tense in sentences such as:

• If it rains, I stay home.
• If it doesn’t rain tomorrow, I take the train.

Køre is a broad verb. It can mean:

• drive
• ride
• go by vehicle
• operate/run, in some contexts

With a bicycle, Danish commonly says:

• køre på cykel = go by bike / ride a bike / cycle

So in this sentence, kører is best understood as:

• ride
• cycle
• go by bike

Even though English usually separates drive and ride, Danish køre covers a wider range.

På cykel is the standard idiomatic expression for by bike / on a bicycle.

So:

• køre på cykel = ride a bike / go by bike

Similar transport expressions include:

• i bil = by car / in a car
• med tog = by train
• på motorcykel = by motorcycle
• til fods = on foot

You should learn på cykel as a set phrase rather than translating it word-for-word too strictly.

Because Danish normally uses the definite form when referring to a specific station that both speaker and listener can identify.

• station = a station
• stationen = the station

So:

• til stationen = to the station

In Danish, definiteness is often added as an ending:

• en station = a station
• stationen = the station

If you said til en station, that would mean to a station, which is less specific.

Yes. That is also correct.

The word så often appears in sentences like this and means something like then:

• Hvis det ikke regner, så kører jeg på cykel til stationen.

Both versions are natural:

• Hvis det ikke regner, kører jeg på cykel til stationen.
• Hvis det ikke regner, så kører jeg på cykel til stationen.

The version without så is slightly leaner and very common. The version with så can sound a little more explicit or conversational.

Because the sentence begins with a subordinate clause:

• Hvis det ikke regner

In standard Danish, that clause is separated from the main clause with a comma:

• Hvis det ikke regner, kører jeg på cykel til stationen.

This comma helps show the structure clearly:

• condition first
• main statement second

Comma rules can vary a bit depending on writing style and whether someone follows traditional or newer comma systems, but in a sentence like this, the comma is standard and expected.

In this clause, ikke is in the normal place:

• det ikke regner

In Danish subordinate clauses, negation like ikke typically comes before the finite verb:

• fordi jeg ikke kommer
• hvis det ikke regner

But in a main clause, ikke usually comes after the finite verb:

• Det regner ikke.
• Jeg kører ikke på cykel.

So compare:

• Hvis det ikke regner ... = subordinate clause
• Det regner ikke. = main clause

This difference is very important in Danish word order.

It can be either, depending on context.

Without more information, the sentence could mean:

1. A habitual action

   • If it isn’t raining, I go to the station by bike.

2. A future plan or decision

   • If it doesn’t rain, I’ll bike to the station.

Danish often leaves this to context rather than marking it with a special future form.

If the speaker wants to make the future meaning more obvious, they might add a time word:

• Hvis det ikke regner i morgen, kører jeg på cykel til stationen.
  = If it doesn’t rain tomorrow, I’ll bike to the station.

It is an en-word:

• en cykel = a bicycle
• cyklen = the bicycle

That matters for articles and adjective agreement.

In this sentence, though, you see på cykel, where there is no article because the whole phrase is idiomatic. So you do not say på en cykel here unless you specifically mean on a bicycle in a more literal or contrastive sense.

Compare:

• Jeg kører på cykel til arbejde. = I go to work by bike.
• Jeg sidder på en cykel. = I am sitting on a bicycle.