Jeg drikker to glas vand om dagen.

Drikker is the present tense form of the verb at drikke (to drink).

• at drikke = infinitive, the dictionary form
• drikker = present tense, used with jeg (I)
• drik! = imperative, used for commands, like Drink!

So:

• Jeg drikker = I drink / I am drinking
• Jeg vil drikke = I will drink
• Drik vand! = Drink water!

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

• jeg drikker
• du drikker
• han/hun drikker
• vi drikker

The form stays the same.

Because the plural of glas is also glas. This is normal for some Danish nouns.

So:

• et glas = a glass
• to glas = two glasses
• mange glas = many glasses

There is no separate plural ending here.

Also notice that after a number like to, Danish normally uses the indefinite form of the noun:

• to glas
• tre biler
• fire bøger

You would not use et here, because the number already makes the noun definite enough in meaning.

Because vand here is being used as a mass noun or uncountable noun, just like water in English.

In English, you say:

• a glass of water

Not:

• a glass of a water

Danish works similarly:

• et glas vand = a glass of water
• to glas vand = two glasses of water

So vand does not need et here.

Danish often uses a very direct noun + noun structure where English uses of.

So:

• et glas vand = a glass of water
• en kop kaffe = a cup of coffee
• en flaske vin = a bottle of wine

You usually do not need a word corresponding to English of in these expressions.

Om dagen is a very common Danish expression meaning per day, daily, or in a day, depending on context.

In this sentence, it means:

• to glas vand om dagen = two glasses of water a day / per day

This is a fixed, natural way to express frequency or rate.

Similar expressions include:

• om ugen = per week
• om måneden = per month
• om året = per year

So you could also say:

• Jeg træner tre gange om ugen. = I work out three times a week.

Yes, but it changes the nuance a little.

• om dagen focuses on the rate or amount per day
• hver dag means every day and focuses more on the repeated time

Compare:

• Jeg drikker to glas vand om dagen. = I drink two glasses of water a day.
• Jeg drikker vand hver dag. = I drink water every day.

You can say:

• Jeg drikker to glas vand hver dag.

That is also correct and natural. It just sounds slightly more like a daily habit, while om dagen sounds especially good when talking about quantities or averages.

This is normal Danish main-clause word order:

• Jeg = subject
• drikker = finite verb
• to glas vand = object
• om dagen = time/frequency expression

So the basic pattern is:

Subject + verb + object + adverbial

That is very common in simple statements.

Danish word order becomes especially important because the finite verb usually comes in second position in main clauses. In this sentence, since the subject comes first, the verb follows it immediately.

Yes. Danish allows some flexibility, especially with time expressions.

For example:

• Jeg drikker to glas vand om dagen.
• Om dagen drikker jeg to glas vand.

The second version is grammatically fine, but it sounds more marked or contrastive, as if you are emphasizing per day.

Notice the word order change in the second sentence:

• Om dagen comes first
• then the verb drikker
• then the subject jeg

That happens because Danish main clauses follow the verb-second rule.

Jeg is one of the words learners often find tricky.

In modern spoken Danish, jeg is often pronounced roughly like:

• yai
• or a very soft y / i-like sound, depending on accent and speed

It is often much softer than the spelling suggests.

A few important points:

• the j is like English y
• the final g is usually not pronounced like a hard English g
• in natural speech, the whole word can sound very reduced

So when listening to native speakers, jeg may sound much shorter and softer than you expect from the spelling.

It can mean both, depending on context.

Danish present tense often covers both:

• I drink
• I am drinking

So:

• Jeg drikker vand. can mean I drink water or I am drinking water

If the sentence is about habit, as here with om dagen, the meaning is clearly habitual:

• I drink two glasses of water a day

If you want to make the ongoing meaning extra clear, Danish can also use expressions like:

• Jeg sidder og drikker vand. = I’m sitting and drinking water
• Jeg er ved at drikke vand. = I’m in the process of drinking water

But in many cases, the simple present is enough.

For the past tense, drikker becomes drak:

• Jeg drak to glas vand om dagen. = I drank two glasses of water a day.

For the future, Danish often uses vil + infinitive:

• Jeg vil drikke to glas vand om dagen. = I will drink two glasses of water a day.

Danish also often uses the present tense for future meaning if the context is clear, but vil drikke is the straightforward form learners usually start with.

In a yes/no question, Danish usually puts the verb before the subject:

• Drikker jeg to glas vand om dagen? = Do I drink two glasses of water a day?

This is a very common pattern:

• statement: Jeg drikker vand.
• question: Drikker jeg vand?

Unlike English, Danish does not usually need an extra helper like do.

Yes. Vand stays singular because it is an uncountable substance noun.

The thing being counted is glas, not vand.

So:

• to glas vand = two glasses of water
• tre flasker mælk = three bottles of milk
• fire kopper kaffe = four cups of coffee

The container word changes according to number; the substance word usually does not.