Jeg arbejder sammen med min chef på kontoret i dag.

Because arbejder is the present tense form of the verb at arbejde (to work).

• at arbejde = infinitive, to work
• jeg arbejder = I work / I am working

In Danish, verbs do not change for person the way they do in English. So:

• jeg arbejder = I work
• du arbejder = you work
• han arbejder = he works

The form arbejde by itself is not the correct present-tense form here.

It can mean both, depending on context.

Danish often uses the simple present where English might use either:

• I work
• I am working

So Jeg arbejder sammen med min chef på kontoret i dag can naturally cover the idea of I’m working with my boss at the office today.

If Danish speakers want to make the ongoing action especially clear, they can sometimes use other expressions, but the simple present is very common.

Sammen med means together with.

• med = with
• sammen med = together with

So:

• Jeg arbejder med min chef can mean I work with my boss
• Jeg arbejder sammen med min chef emphasizes that you and your boss are working together

It adds a stronger sense of cooperation or shared activity.

Because in Danish, when you use a possessive like min (my), the noun usually stays in its indefinite form.

So:

• min chef = my boss
• not min chefen

Compare:

• chefen = the boss
• min chef = my boss

This is very similar to English: we say my boss, not my the boss.

Because chef is a common-gender noun in Danish.

Danish has two grammatical genders:

• common gender → usually takes en
• neuter gender → usually takes et

Since it is en chef, the possessive form is:

• min chef = my boss

If the noun were neuter, you would use mit:

• mit hus = my house

This is mostly a matter of idiomatic preposition use.

With workplaces and institutions, Danish often uses på where English might use at:

• på kontoret = at the office
• på skolen = at the school
• på hospitalet = at the hospital

Using i would suggest more literally inside something, and in many cases it sounds less natural for the normal idea of being at a workplace.

So på kontoret is the natural choice for at the office.

Because kontor is a neuter noun, and -et is the usual definite ending for singular neuter nouns.

• et kontor = an office
• kontoret = the office

So in the sentence:

• på kontoret = at the office

This is one of the big differences from English: Danish often puts the at the end of the noun instead of using a separate word.

Because Danish usually expresses the by adding an ending to the noun.

So:

• kontor = office
• kontoret = the office

You do not normally say a separate word equivalent to the before it in this kind of phrase.

This is called the suffixed definite article, and it is very common in Danish.

Yes. Danish word order is flexible, but it follows the V2 rule in main clauses: the finite verb normally comes in the second position.

Your sentence is:

• Jeg arbejder sammen med min chef på kontoret i dag.

You can also say:

• I dag arbejder jeg sammen med min chef på kontoret.

Notice what happens:

• when I dag is moved to the front,
• the verb arbejder stays second,
• and jeg moves after the verb.

That inversion is very important in Danish main clauses.

Yes, you can, as long as you keep the verb in second position.

For example:

• Sammen med min chef arbejder jeg på kontoret i dag.

This is grammatical, though it may sound more marked or stylistic than the original. The original version is more neutral.

Again, the key point is:

• first element: Sammen med min chef
• second position: arbejder
• then subject: jeg

Mostly yes, but the tone can vary a bit depending on context.

Chef in Danish commonly means:

• boss
• manager
• supervisor, depending on the situation

It is a normal everyday word and not especially formal. In many cases, it works very much like English boss.

Yes, jeg is a word many learners notice right away because the spelling and pronunciation do not match English expectations.

In standard spoken Danish, jeg is often pronounced something like:

• yai
• or a very softened version close to ya

The final g is not pronounced like English g in go.

Exact pronunciation varies a bit by speaker and region, but the important thing is that it sounds much softer than the spelling suggests.

Yes, it is natural Danish.

It is a completely normal way to say that you are working together with your boss at the office today.

A Dane might also say slightly different versions depending on emphasis, for example:

• I dag arbejder jeg sammen med min chef på kontoret.
• Jeg arbejder på kontoret sammen med min chef i dag.

All of these are natural. The original sentence is clear and idiomatic.

A good way to learn it is by chunks:

• Jeg arbejder = I work / I am working
• sammen med = together with
• min chef = my boss
• på kontoret = at the office
• i dag = today

If you learn these chunks, you can reuse them easily:

• Jeg arbejder sammen med Anna.
• Jeg arbejder på kontoret.
• Jeg arbejder hjemme i dag.
• Jeg arbejder sammen med min kollega.

This chunk-based approach is very helpful in Danish.