Hvis jeg bliver ved med at slumre, kommer jeg for sent til forelæsningen.

Hvis means if and introduces a condition.

So Hvis jeg bliver ved med at slumre sets up the condition: this is what happens if that situation continues.

A learner should also know the contrast with når:

• hvis = if (a condition, not certain)
• når = when (something expected or repeated)

So here hvis is correct because the speaker is talking about a possible outcome, not a guaranteed one.

Bliver ved med at is a very common Danish expression meaning keep doing something or continue to do something.

In this sentence:

• bliver ved med at slumre = keep snoozing

It is best learned as a chunk:

• at blive ved med at + infinitive

Examples:

• Jeg bliver ved med at glemme det. = I keep forgetting it.
• Han bliver ved med at tale. = He keeps talking.

Even though bliver comes from at blive, here the whole phrase is idiomatic. You should not try to translate each word separately too literally.

Because slumre is an infinitive here, and after bliver ved med Danish normally uses at + infinitive.

Pattern:

• blive ved med at + verb

So:

• bliver ved med at slumre
• bliver ved med at tale
• bliver ved med at ringe

This is similar to English keep + -ing, but Danish uses at + infinitive instead of an -ing form.

Slumre means doze, snooze, or sleep lightly.

In a sentence like this, it strongly suggests using the snooze function on an alarm clock or drifting back into light sleep instead of getting up.

So the nuance is not just sleep in general. It is more like:

• staying half asleep
• snoozing again
• not properly getting out of bed

That makes it a very natural choice in this context.

This is because Danish main clauses follow the V2 rule: the finite verb usually comes in the second position.

The sentence begins with the if-clause:

• Hvis jeg bliver ved med at slumre

After that, the main clause starts. Since the first position is already taken by the whole conditional clause, the verb comes before the subject:

• kommer jeg for sent til forelæsningen

So the structure is:

• [conditional clause], [verb] [subject] ...

This is very common in Danish:

• Hvis det regner, bliver vi hjemme.
• Når hun kommer, starter vi.
• I morgen tager jeg toget.

In English, you would still say I will be late, but Danish changes the word order because of V2.

Danish often uses the present tense to talk about the future when the future meaning is clear from context.

So in this sentence:

• Hvis jeg bliver ved med at slumre, kommer jeg for sent ...

both verbs are present tense, but the meaning is future:

• if I keep snoozing, I’ll be late

This is very normal Danish. You do not need a separate future form like English will every time.

You could use future marking in some contexts, but here the present tense sounds natural and idiomatic.

At komme for sent is the standard expression for to be late or to arrive late.

So:

• jeg kommer for sent = I’m late / I arrive late

This is a fixed expression, and it is extremely common.

Examples:

• Hun kom for sent på arbejde. = She was late for work.
• Vi kommer for sent til mødet. = We’re late for the meeting.

Even though for often means too, in this expression you should learn komme for sent as a unit meaning be late.

Because Danish uses til with being late for an event, class, meeting, lecture, and so on.

So:

• komme for sent til noget = be late for something

Examples:

• for sent til skole
• for sent til mødet
• for sent til timen
• for sent til forelæsningen

Here forelæsningen means the lecture, so the phrase means being late to/for the lecture.

Forelæsningen is the definite singular form of forelæsning.

Breakdown:

• forelæsning = lecture
• forelæsningen = the lecture

The ending -en is the definite article attached to the noun, which is very common in Danish.

So instead of a separate word like English the, Danish often adds the definiteness to the end of the noun.

Compare:

• en forelæsning = a lecture
• forelæsningen = the lecture

Yes, you could say that, and the meaning would be very similar.

• Hvis jeg fortsætter med at slumre ...
• Hvis jeg bliver ved med at slumre ...

But there is a nuance:

• bliver ved med at is very common in everyday speech and often feels a bit more natural and conversational
• fortsætter med at is also correct, but can sound slightly more neutral or formal

In a sentence about oversleeping and snoozing, bliver ved med at slumre sounds especially natural.

Yes, in standard Danish you put a comma between the conditional subordinate clause and the main clause here:

• Hvis jeg bliver ved med at slumre, kommer jeg for sent til forelæsningen.

The comma marks the boundary between:

• the if-clause
• the main clause

So this punctuation helps show the structure clearly.

It can, depending on context, but it does not literally mean press the snooze button.

Slumre means snooze/doze, so in a morning-alarm situation it strongly suggests that idea. If you want to be very explicit about the button itself, Danish might say something like:

• trykke på snooze-knappen
• snooze alarmen

But in your sentence, slumre works well because it describes the sleepy action rather than the physical button press.

Not without changing the meaning.

• Hvis jeg bliver ved med at slumre ... = If I keep snoozing ...
• Når jeg bliver ved med at slumre ... would sound more like when/whenever I keep snoozing

That makes når sound more expected, habitual, or certain.

In this sentence, the speaker is presenting a condition and consequence, so hvis is the better choice.