Filmen om aftenen er både sjov og spændende.

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Breakdown of Filmen om aftenen er både sjov og spændende.

• være: to be
• aftenen: the evening
• om: in

Questions & Answers about Filmen om aftenen er både sjov og spændende.

Why is it Filmen and not en film at the start of the sentence?

Danish usually marks definiteness with an ending on the noun instead of a separate word:

• en film = a film (indefinite, singular)
• filmen = the film (definite, singular)

So Filmen om aftenen means the film in the evening.
If you said En film om aftenen, it would mean a film in the evening, not a specific one that speaker and listener already know about.

The pattern for film is:

• en film – a film
• filmen – the film
• film – films
• filmene – the films

What does the preposition om mean in om aftenen, and why not i aftenen?

In time expressions, om often means in / during (a general time of day):

• om morgenen – in the morning(s)
• om eftermiddagen – in the afternoon(s)
• om aftenen – in the evening(s)
• om natten – at night

So om aftenen is the standard way to say in the evening (as a general time period, or habitually).

You do not normally say i aftenen in Danish. Instead, you say:

• i aften – this evening / tonight (a specific evening)

Why is it aftenen (with -en) and not just aften in this expression?