Vi spiser aftensmad, og bagefter ser vi en film.

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

In the second clause, bagefter is placed first:

• Bagefter = position 1
• ser = position 2
• vi comes after the verb

So:

• Bagefter ser vi en film = correct

Compare it with the more neutral order:

• Vi ser en film bagefter

Both are correct, but when bagefter is moved to the front, the verb has to come before the subject.

Because this sentence has two coordinated main clauses:

• Vi spiser aftensmad
• og bagefter ser vi en film

Each main clause normally has its own subject and verb. In English, learners sometimes expect the subject to carry over automatically, but in Danish it is very natural to repeat it in a new clause.

If you want to avoid repeating vi, you would usually make the sentence structurally different, for example:

• Vi spiser aftensmad og ser bagefter en film

But that is not exactly the same rhythm or emphasis as the original sentence.

Yes. Aftensmad is a very common everyday word for the evening meal.

It is made up of:

• aften = evening
• mad = food

So it literally means something like evening food, but in normal English you would translate it as dinner or evening meal.

For a learner, aftensmad is a very safe and natural word to use.

Sometimes, but aftensmad is safer.

Middag can vary more by region, family, and habit. In some contexts it can refer to the main hot meal, and in some contexts it may feel a bit more traditional or less precise than aftensmad.

If you specifically mean the evening meal, aftensmad is usually the clearest everyday choice.

Bagefter means afterward, afterwards, or after that.

Yes, it is written as one word.

In this sentence, it tells you the order of events:

1. first they eat dinner
2. afterward they watch a film

A near-synonym is efterpå, which is also common:

• Bagefter ser vi en film
• Efterpå ser vi en film

Both are natural.

Not really, because they do different jobs.

• og = and; it connects the two clauses
• bagefter = afterward; it tells you the time relationship

So:

• og gives the grammatical link
• bagefter gives the meaning of sequence

Without bagefter, the sentence would just mean:

• We eat dinner, and we watch a film

With bagefter, it clearly means the film happens after dinner.

Because film is a common-gender noun in Danish, so it takes en in the singular indefinite form:

• en film
• filmen = the film

Not:

• et film

This is something you simply have to learn with the noun.

Also, film in Danish commonly means film or movie in everyday use.

For watching a film, the normal Danish expression is:

• se en film

That is the standard collocation.

Se på often means more literally look at or watch/look at something visually, and it is less natural here. So for a learner, the best choice is:

• Vi ser en film

You may also hear:

• se film = watch films/movies in general

But in this sentence, en film means one film / a film.

Yes. Danish often uses the present tense for planned or expected future actions, especially when the context makes the time clear.

So:

• Vi spiser aftensmad, og bagefter ser vi en film

can describe what is going to happen later, even though the verbs are present tense:

• spiser
• ser

This is very normal in Danish, just as English can sometimes say:

• We eat dinner, and then we watch a film or
• We’re having dinner, and then we’re watching a film

Because the sentence joins two main clauses.

• Vi spiser aftensmad
• og bagefter ser vi en film

In Danish, a comma is normally used between coordinated main clauses like these. So the comma here is standard and helps show the boundary between the two parts of the sentence.