Mötet börjar halv nio i morgon.

Because mötet is the definite form of the noun.

• ett möte = a meeting
• mötet = the meeting

In Swedish, the definite article is often added to the end of the noun instead of being a separate word like English the.

Since möte is a neuter noun (ett noun), its definite singular form is -t:

• ett möte → mötet

Börjar is the present tense of börja, which means to begin / to start.

• börja = to begin
• börjar = begins / is beginning / starts

In Swedish, verbs in the present tense usually end in -r, and they do not change depending on the subject:

• jag börjar = I begin / I’m beginning
• du börjar = you begin
• mötet börjar = the meeting begins

So börjar works for all persons.

This is one of the most important time-expression differences for English speakers.

In Swedish, halv nio literally means half to nine, not half past nine.

So:

• halv åtta = 7:30
• halv nio = 8:30
• halv tio = 9:30

Swedish counts the half hour toward the next hour.

That is different from English, where half nine can be confusing depending on dialect, and half past nine clearly means 9:30.

No. In Swedish, you often give the time without a preposition like at.

So:

• Mötet börjar halv nio. = The meeting starts at 8:30.

If you want, you can also say:

• Mötet börjar klockan halv nio.

Here klockan means something like at ... o’clock, but it is often omitted when the meaning is clear.

Traditionally, i morgon is written as two words and means tomorrow.

• i morgon = tomorrow

You may also see imorgon written as one word. That spelling is also common in modern Swedish. Both are understood, but i morgon is a very standard form.

So for a learner, it is good to recognize both:

• i morgon
• imorgon

Both mean tomorrow.

Because Swedish word order is fairly flexible with time expressions, and putting i morgon at the end is completely natural.

• Mötet börjar halv nio i morgon.
• I morgon börjar mötet halv nio.

Both are correct, but the emphasis changes slightly.

If you start the sentence with I morgon, Swedish uses V2 word order, which means the verb must come second:

• I morgon börjar mötet halv nio.

Not:

• I morgon mötet börjar halv nio. ❌

Yes, you could, and it would be understood.

• klockan åtta trettio = at 8:30

But in everyday Swedish, halv nio is often the more natural and common way to say 8:30.

So these are both possible:

• Mötet börjar halv nio i morgon.
• Mötet börjar klockan åtta trettio i morgon.

The first often sounds more idiomatic in ordinary speech.

The letter ö is a Swedish vowel that does not exist in the same way in standard English.

A rough guide:

• ö sounds somewhat like the vowel in British English bird, word, or heard, but with rounded lips.

So:

• möte
• mötet

both contain that ö sound.

You do not pronounce it like English o in go.

The sentence follows a very common Swedish pattern:

• Mötet = subject
• börjar = verb
• halv nio = time expression
• i morgon = time expression

So literally:

• The meeting
  • begins
    • half nine
      • tomorrow

A natural English rendering is:

• The meeting starts at 8:30 tomorrow.

This is a normal Swedish main clause with the verb in second position:

• Subject first: Mötet
• Verb second: börjar

That basic pattern is very important in Swedish.