Jeg skifter kaffefilteret, før jeg tænder kaffemaskinen om morgenen.

Danish often uses the present tense for habitual actions and routines, just like English does in sentences such as I change the filter before I turn on the coffee machine.

So jeg skifter means something like:

• I change
• I usually change
• I change as part of my routine

It does not have to mean that the action is happening right now.

Danish forms compound nouns very freely, much more than English does.

So:

• kaffe = coffee
• filter = filter
• kaffefilter = coffee filter

and

• kaffe = coffee
• maskine = machine
• kaffemaskine = coffee machine

In Danish, these are normally written as single words, not separate words.

Those endings mark the definite form, which corresponds to English the.

So:

• et kaffefilter = a coffee filter
• kaffefilteret = the coffee filter

and

• en kaffemaskine = a coffee machine
• kaffemaskinen = the coffee machine

Danish usually adds definiteness to the end of the noun instead of using a separate word like the.

Because Danish nouns have grammatical gender.

• et kaffefilter is a neuter noun, so the definite ending is -et
• en kaffemaskine is a common gender noun, so the definite ending is -en

So the endings depend on whether the noun takes en or et in the indefinite form.

Because før jeg tænder kaffemaskinen is a full subordinate clause, and Danish needs its own subject and finite verb there.

So the sentence is structured like this:

• Jeg skifter kaffefilteret
• før jeg tænder kaffemaskinen

Even though English learners may feel the second jeg is repetitive, it is completely normal and necessary in this kind of clause.

Because after a subordinating conjunction like før, Danish uses subordinate clause word order.

In a normal main clause, Danish often puts the verb in second position:

• Jeg tænder kaffemaskinen

But after før, the subject comes before the finite verb:

• før jeg tænder kaffemaskinen

So:

• main clause: Jeg tænder ...
• subordinate clause: før jeg tænder ...

In this particular example, the word order looks the same as English, but it follows Danish subordinate-clause rules.

In Danish, at tænde is commonly used for turning on electrical devices and lights.

So jeg tænder kaffemaskinen means I turn on the coffee machine.

Related verbs:

• at tænde = to turn on
• at slukke = to turn off

This is very natural Danish for appliances.

Yes, often you can.

Both før and inden can mean before in this kind of sentence:

• før jeg tænder kaffemaskinen
• inden jeg tænder kaffemaskinen

In many everyday contexts, both sound natural.
Very roughly:

• før is often the most direct and common equivalent of before
• inden can sometimes feel slightly more formal or careful, depending on context

But in this sentence, both are possible.

Om morgenen means in the morning or in the mornings, depending on context.

Here it refers to a time of day as part of a routine.

By contrast:

• om morgenen = in the morning / in the mornings
• i morgen = tomorrow

These are easy to confuse, but they mean completely different things.

Time expressions are often placed toward the end of a Danish sentence, especially when they give background information like when something usually happens.

So this sounds very natural:

• Jeg skifter kaffefilteret, før jeg tænder kaffemaskinen om morgenen.

You could move the time phrase for emphasis, but the end position is neutral and common.

For example:

• Om morgenen skifter jeg kaffefilteret, før jeg tænder kaffemaskinen.

That version puts more focus on in the morning.

Because før jeg tænder kaffemaskinen om morgenen is a subordinate clause.

In Danish, subordinate clauses are often separated by a comma in writing. So the comma helps mark the boundary between:

• the main clause: Jeg skifter kaffefilteret
• the subordinate clause: før jeg tænder kaffemaskinen om morgenen

Comma rules in Danish can vary depending on the system being followed, but this comma is very normal.

Yes, skifter is the natural choice here.

At skifte often means:

• to change
• to replace

So jeg skifter kaffefilteret means that you replace the filter.

At bytte usually means to swap or exchange, often with something else. That is less natural here unless you are emphasizing an exchange.

So for a coffee filter, skifte is the normal everyday verb.

These two words can be tricky for English speakers.

A few helpful points:

• før has the Danish vowel ø, which does not exist exactly in English
• tænder has æ, another vowel that English does not really have
• the r at the end of før is not pronounced like a strong English r

A rough learner-friendly guide:

• før sounds something like fur said with rounded lips, but that is only approximate
• tænder begins with a vowel somewhat like the a in cat, but again not exactly

The best approach is to listen to native audio, because Danish vowels are hard to learn accurately from spelling alone.