Jeg ved ikke, om min ven kommer til mødet i morgen.

A word-for-word breakdown is:

• Jeg = I
• ved = know
• ikke = not
• om = whether / if
• min = my
• ven = friend
• kommer = comes / is coming
• til = to
• mødet = the meeting
• i morgen = tomorrow

A very literal English version would be:

I know not whether my friend comes to the meeting tomorrow.

More natural English is:

I don’t know if my friend is coming to the meeting tomorrow.

Danish has two common verbs that can translate as to know:

• at vide = to know a fact, piece of information, or answer
• at kende = to know a person, place, or something through familiarity

Here, the speaker is talking about knowing whether something will happen, so Danish uses at vide:

• Jeg ved ikke ... = I don’t know ...

Compare:

• Jeg ved, hvor han bor. = I know where he lives.
• Jeg kender ham. = I know him.

So in this sentence, ved is the correct choice because it is about information, not familiarity.

Yes, om can mean about, but it also has another very common meaning: whether / if.

In this sentence, om introduces an indirect yes/no question:

• Jeg ved ikke, om min ven kommer ...
• I don’t know whether / if my friend is coming ...

This is different from hvis, which usually means if in a conditional sense:

• Hvis han kommer, bliver jeg glad. = If he comes, I’ll be happy.

So:

• om = whether / if
• hvis = if in the sense of in case / on condition that

That distinction is very important in Danish.

Because Danish often uses the present tense to talk about the future, especially when the time is clear from the context.

Here, i morgen already tells you the action is in the future, so kommer is perfectly natural:

• min ven kommer til mødet i morgen = my friend is coming to the meeting tomorrow

English often uses is coming or will come, but Danish very often just uses the present tense.

Other examples:

• Vi ses i morgen. = We’ll see each other tomorrow.
• Han rejser næste uge. = He’s leaving next week.

So there is nothing strange about kommer here.

The verb at komme often takes til when it means come to a place or event.

So:

• komme til mødet = come to the meeting
• komme til festen = come to the party
• komme til Danmark = come to Denmark

In English, to is also needed, and Danish works similarly here.

Be careful, though: komme til can also have other meanings in other contexts, such as happen to do something:

• Jeg kom til at glemme det. = I happened to forget it / I accidentally forgot it.

But in your sentence, it simply means come to.

Mødet is the definite form, meaning the meeting.

In Danish, the definite article is usually added to the end of the noun:

• et møde = a meeting
• mødet = the meeting

The sentence uses mødet because it refers to a specific meeting that the speaker and listener probably both know about.

Compare:

• Han kommer til et møde i morgen. = He’s coming to a meeting tomorrow.
  (any meeting, not specified)

• Han kommer til mødet i morgen. = He’s coming to the meeting tomorrow.
  (a specific meeting)

Because in Danish, tomorrow is normally written as the two-word expression i morgen.

So:

• i morgen = tomorrow
• i dag = today
• i går = yesterday

This is just the standard spelling in modern Danish.

Learners sometimes expect one word because English has tomorrow, but Danish does not write it that way.

In a normal main clause, Danish usually puts ikke after the finite verb.

So:

• Jeg ved ikke ...
• literally: I know not ...

This is standard Danish word order.

Compare:

• Jeg kommer ikke. = I’m not coming.
• Han bor ikke her. = He doesn’t live here.

English usually puts not with do/does/did or another auxiliary, but Danish does not need do-support like English does. That is why Jeg ved ikke is the normal form, not something like Jeg ikke ved.

Because after om, you have a subordinate clause, and subordinate clauses in Danish normally keep the subject before the verb:

• om min ven kommer
• whether my friend is coming

This is different from a direct question.

Compare:

• Kommer min ven? = Is my friend coming?
  Direct question: verb before subject

• Jeg ved ikke, om min ven kommer. = I don’t know if my friend is coming.
  Indirect question: subject before verb

So even though English uses if in both cases, Danish changes the structure depending on whether it is a direct question or an indirect one.

Yes, in some contexts you can use hvorvidt to mean whether, but it is more formal and less common in everyday speech.

So:

• Jeg ved ikke, om min ven kommer ... = natural, everyday Danish
• Jeg ved ikke, hvorvidt min ven kommer ... = more formal or written

For normal conversation, om is the better choice.

Yes, quite a few things are softer or shorter in speech than the spelling suggests.

A few common points:

• jeg is often pronounced more like yai / yai̯ or even very reduced, depending on dialect and speed
• ikke is often pronounced something like igə or ege in casual speech
• ved often has a soft d
• mødet has the Danish vowel ø, which English does not have
• i morgen is often spoken smoothly as one rhythm unit

You do not need perfect pronunciation right away, but it helps to know that spoken Danish is often more reduced than the written form suggests.

Not in this sentence if you want to mean my friend.

• min ven = my friend
• ven by itself = friend, but it would usually need something else around it to sound complete

So:

• Jeg ved ikke, om min ven kommer ... = I don’t know if my friend is coming ...

If you removed min, the sentence would no longer mean the same thing.

Also note that ven is a common gender noun, so the possessive is min. For a neuter noun, you would use mit instead:

• min ven = my friend
• mit møde = my meeting

Yes—this sentence contains several very useful Danish patterns:

1. Jeg ved ikke, om ...
   = I don’t know if / whether ...

2. Present tense used for future meaning

   • kommer i morgen = is coming tomorrow

3. komme til + event/place

   • komme til mødet = come to the meeting

4. Definite noun ending

   • mødet = the meeting

5. Subordinate clause word order after om

   • om min ven kommer
   • not om kommer min ven

So this one sentence is a very good example of everyday Danish structure.