Om barnet fortsätter att hosta och gäspa i morgon, måste vi kanske boka om resan.

Barn is an ett noun.

• ett barn = a child
• barnet = the child
• barn can also be the plural indefinite form = children

So barnet is the definite singular form, made by adding the ending -et to barn.

Swedish often uses the present tense for future meaning when a time expression makes the future clear.

So fortsätter is present tense, but i morgon tells you the action is about tomorrow. This is very natural in Swedish.

It is especially normal in an if clause like this:

• Om barnet fortsätter ... i morgon ...

English does something similar:

• If the child keeps coughing tomorrow...

After fortsätta, Swedish often uses att + infinitive:

• fortsätta att hosta
• fortsätta att gäspa

So att introduces the next verb.

Also, with fortsätta, the att is often optional in everyday Swedish. That means both of these are possible:

• barnet fortsätter att hosta
• barnet fortsätter hosta

The version with att sounds completely normal and standard.

Because one att can apply to both verbs when they are joined by och.

So:

• att hosta och gäspa

means:

• to cough and yawn

Both hosta and gäspa are infinitives here, and they are both controlled by fortsätter att. Repeating att would usually be unnecessary.

This is because Swedish main clauses normally follow verb-second word order.

The sentence starts with a subordinate clause:

• Om barnet fortsätter att hosta och gäspa i morgon

After that, the main clause begins. In the main clause, the finite verb must come before the subject because the first position is already taken by the opening clause.

So you get:

• måste vi kanske boka om resan

If there were no opening om clause, the normal order would be:

• Vi måste kanske boka om resan

Kanske is a sentence adverb meaning maybe or perhaps.

In a normal main clause, sentence adverbs usually come after the finite verb and the subject. Because the verb has moved forward for verb-second word order, the pattern becomes:

• måste = finite verb
• vi = subject
• kanske = sentence adverb

So:

• måste vi kanske boka om resan

is the expected word order here.

Because måste is a modal verb, and after modal verbs Swedish normally uses the bare infinitive, without att.

So you say:

• måste boka
• kan boka
• vill boka
• ska boka

Not:

• måste att boka

This is a very common pattern in Swedish.

No, they mean different things.

• The first Om means if
• The om in boka om is part of the verb and means something like re- or change

So:

• Om barnet ... = If the child ...
• boka om resan = rebook or reschedule the trip

This is a good example of how one Swedish word can have different meanings depending on context.

Yes. Both exist.

• boka om resan
• omboka resan

They mean essentially the same thing: rebook or reschedule the trip.

Boka om is very common and feels quite natural and idiomatic. Omboka is also correct and may feel a bit more compact or formal in some contexts.

Yes, both spellings are used.

• i morgon
• imorgon

Both mean tomorrow. Many learners first meet i morgon as two words, but imorgon is also common in modern Swedish.

Not always. In Swedish, commas are often less strict than in English.

After an opening subordinate clause like this, many writers use a comma for clarity:

• Om barnet fortsätter att hosta och gäspa i morgon, måste vi kanske boka om resan.

But it is also common to write it without a comma:

• Om barnet fortsätter att hosta och gäspa i morgon måste vi kanske boka om resan.

Both can be acceptable, especially in modern everyday writing.