Jeg går ned ad trappen, fordi elevatoren er for langsom.

I walk down the stairs because the elevator is too slow.

Breakdown of Jeg går ned ad trappen, fordi elevatoren er for langsom.

• jeg: I
• være: to be
• fordi: because
• gå: to walk
• for: too
• langsom: slow
• elevatoren: the elevator
• trappen: the stairs
• ned ad: down

Questions & Answers about Jeg går ned ad trappen, fordi elevatoren er for langsom.

Why is trappen singular when English usually says the stairs?

Because Danish often treats a staircase as one thing: trappen = the staircase / the stairs.

So even though English usually uses a plural noun, Danish very naturally uses the singular here.

• en trappe = a staircase / a set of stairs
• trappen = the staircase / the stairs

If you want to talk about the individual steps, that is something else, for example trin or trappetrin.

What does ned ad mean, and why are both words needed?

Ned means down, and ad here helps express movement along/down a route or surface.

So gå ned ad trappen means something like:

• go down the stairs
• walk down the staircase

Using both words is the normal idiomatic way to describe moving downward along the stairs.
If you said only ned, it would not express the full idea as clearly.

Why is it ad and not af?

In standard Danish, ad is used when the movement goes along something, such as a road, wall, hill, or staircase.

So:

• ned ad trappen = down the stairs
• op ad bakken = up the hill
• hen ad vejen = along the road

By contrast, af usually means off or from.

A lot of native speakers do say or write af in places where traditional grammar prefers ad, so you may encounter that. But as a learner, ned ad trappen is the safest standard form.

Why do trappen and elevatoren end in -en?

Because Danish usually adds the definite article to the end of the noun instead of putting a separate word in front.

So:

• en trappe = a staircase

• trappen = the staircase / the stairs

• en elevator = an elevator
• elevatoren = the elevator

This -en ending is common for common-gender nouns.
For many neuter nouns, the definite ending is -et instead.

Does går mean go or walk here?

It can be understood as either, depending on how naturally you would say it in English.

gå basically means walk, but in many contexts English may translate it as go if that sounds better. In this sentence, går ned ad trappen most naturally means:

• I walk down the stairs
• I go down the stairs

So yes, the idea includes movement on foot.

What does for mean in for langsom?

Here for means too.

So:

• for langsom = too slow

This is a very common Danish pattern:

• for dyr = too expensive
• for stor = too big
• for sent = too late

Compare:

• meget langsom = very slow
• for langsom = too slow
• alt for langsom = far too slow

Why is it langsom and not langsomt or langsomme?

Because elevatoren is a singular common-gender noun, and predicate adjectives after er agree with the noun.

So:

• elevatoren er langsom = the elevator is slow

Compare:

• huset er langsomt would be wrong, because hus is neuter and should be huset er langsomt
• elevatorerne er langsomme = the elevators are slow

A quick comparison:

• common gender singular: langsom
• neuter singular: langsomt
• plural: langsomme

What happens to word order after fordi?

Fordi means because and introduces a subordinate clause.

In your sentence:

• fordi elevatoren er for langsom

the word order looks normal to an English speaker. But Danish subordinate clauses have their own rules, especially when words like ikke are present.

Compare:

• main clause: Elevatoren er ikke hurtig nok
• subordinate clause: fordi elevatoren ikke er hurtig nok

Notice that in the subordinate clause, ikke comes before the verb er.

So fordi is a useful word to watch, because it can affect word order.

Do I need the comma before fordi?

The comma in Jeg går ned ad trappen, fordi elevatoren er for langsom. is very common and fully correct.

In modern Danish, you may also see sentences written without that comma, depending on which comma system is being used. So both of these can be acceptable:

• Jeg går ned ad trappen, fordi elevatoren er for langsom.
• Jeg går ned ad trappen fordi elevatoren er for langsom.

If you are following a textbook or teacher, it is best to follow that style consistently.

Could I also say Jeg tager trappen instead of Jeg går ned ad trappen?

Yes. Jeg tager trappen is also very natural.

The difference is mainly one of focus:

• Jeg går ned ad trappen emphasizes the physical action of going down the stairs.
• Jeg tager trappen emphasizes the choice of using the stairs rather than the elevator.

So if you mean I’m taking the stairs because the elevator is too slow, then Jeg tager trappen, fordi elevatoren er for langsom is an excellent alternative.