Vi kan se døren herfra.

Because kan is a modal verb meaning can, and Danish uses modal verbs much like English does.

• kan = finite verb, which carries the tense
• se = main verb in the infinitive

So:

• Vi kan se døren herfra.
• literally: We can see the door from here.

This is parallel to English:

• We can see
• not We can sees

In Danish, after a modal verb like kan, the next verb stays in its basic form: se.

After a modal verb such as kan, Danish normally does not use at.

So you say:

• Vi kan se døren
• not Vi kan at se døren

This is similar to English, where we say:

• We can see
• not We can to see

Other common Danish modal verbs that also behave this way are:

• vil = will / want to
• skal = shall / must / have to
• må = may / must
• bør = ought to

Because døren means the door, while dør means just door.

Danish usually makes nouns definite by adding an ending to the noun, instead of putting a separate word like the in front.

• dør = door
• døren = the door

So in this sentence, døren is the specific door that can be seen.

This is one of the biggest differences from English noun grammar.

Herfra means from here.

It is made from:

• her = here
• fra = from

In Danish, these are often written together as one word: herfra.

So:

• Vi kan se døren herfra.
• We can see the door from here.

You will see similar forms in Danish, such as:

• derfra = from there
• hjemmefra = from home

Usually, herfra is the natural choice.

While fra her might be understandable in some contexts, standard Danish strongly prefers herfra for from here.

So a learner should normally use:

• herfra

not:

• fra her

The one-word form is the idiomatic one.

In a normal main clause, Danish follows the V2 rule, which means the finite verb must come in the second position.

In this sentence:

• Vi = first element
• kan = finite verb, so it must be second
• se døren herfra = the rest

That is why kan comes right after Vi.

A very common variation is to move another element to the front. If you do that, the verb still stays second:

• Herfra kan vi se døren.

This also means From here, we can see the door.

So Danish word order is not completely fixed, but the verb-second pattern is very important.

Yes, absolutely.

Both are correct:

• Vi kan se døren herfra.
• Herfra kan vi se døren.

The difference is mainly focus.

• Vi kan se døren herfra = neutral statement
• Herfra kan vi se døren = emphasizes from here

Notice that when Herfra moves to the front, kan still stays in second position, and vi moves after it.

The difference is nuance.

• Vi kan se døren = We can see the door
  • focuses on the fact that the door is visible from where we are
  • often suggests possibility or ability
• Vi ser døren = We see the door
  • more direct and plain
  • simply states that we see it

In many situations, both could work, but kan se is very common when talking about visibility.

For example:

• Jeg kan ikke se tavlen herfra. = I can’t see the board from here.
• This sounds more natural than a literal I do not see the board from here in many contexts.

It can suggest either, depending on context.

In Vi kan se døren herfra, kan most naturally means something like:

• it is possible for us to see the door from here
• the door is visible from here

It does not necessarily mean a special skill or physical ability. It is often just about the circumstances.

So here, kan is closer to:

• are able to
• can
• are in a position to

because of where the speakers are standing.

The tricky part for English speakers is ø.

Very roughly:

• dør sounds a bit like dur or dir said with rounded lips
• døren is roughly DUR-en or DIR-en, but that is only an approximation

A few useful points:

• ø is a front rounded vowel, which English does not really have
• the r in Danish often affects the vowel before it
• the final -en is usually unstressed

A rough learner-friendly pronunciation guide might be:

• døren ≈ DUH-ren with rounded lips, but not exactly

It is best to listen to native audio, because ø is hard to learn from spelling alone.

Here is the structure:

• Vi = subject pronoun, we
• kan = finite modal verb, can
• se = infinitive main verb, see
• døren = direct object, the door
• herfra = adverbial expression, from here

So the sentence pattern is:

• subject + finite verb + infinitive + object + adverbial

That is a very common and useful Danish sentence pattern.