Jeg arbejder ikke på fredag, så jeg bliver hjemme.

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

So:

• Jeg arbejder ikke på fredag = I’m not working on Friday
• literally: I work not on Friday

Because på fredag already tells you this is about a future time, Danish does not need a separate future form here.

You could use vil in some cases, but it would sound different:

• Jeg vil ikke arbejde på fredag = I don’t want to work on Friday / I won’t work on Friday

That can suggest willingness or intention, not just a simple fact about your schedule.

In a normal main clause in Danish, the finite verb usually comes early, and ikke typically comes after it.

So the pattern here is:

• Jeg = subject
• arbejder = finite verb
• ikke = negation
• på fredag = time expression

That gives:

• Jeg arbejder ikke på fredag

This is different from English, where we usually need do not:

• I do not work on Friday

A useful comparison:

• Jeg arbejder ikke på fredag. = main clause
• ... fordi jeg ikke arbejder på fredag. = subordinate clause

In the subordinate clause, ikke comes before the main verb more often.

På fredag means on Friday, usually this coming Friday or the Friday being talked about.

It is a very common time expression in Danish.

Examples:

• Vi ses på fredag. = See you on Friday.
• Jeg har fri på fredag. = I’m off on Friday.

Even though English also uses on, you should not assume Danish time prepositions always match English exactly. Here, though, på fredag is the standard expression.

Usually på fredag means this coming Friday or the specific Friday in question.

If you want to say every Friday or on Fridays in general, Danish would normally use something like:

• om fredagen = on Fridays
• hver fredag = every Friday

So:

• Jeg arbejder ikke på fredag = I’m not working this Friday
• Jeg arbejder ikke om fredagen = I don’t work on Fridays
• Jeg arbejder ikke hver fredag = I don’t work every Friday

Here så means so in the sense of therefore / as a result.

So the sentence is:

• Jeg arbejder ikke på fredag, så jeg bliver hjemme.
• I’m not working on Friday, so I’m staying home.

Be careful: så can also mean other things in Danish, depending on context, such as:

• then
• so
• such
• part of fixed expressions

But in this sentence, it clearly means so / therefore.

Because så is being used here as a conjunction meaning so, linking two full clauses.

So the second clause keeps normal main-clause word order:

• så jeg bliver hjemme

That is:

• så = conjunction
• jeg = subject
• bliver = verb

If så starts a new sentence more like an adverb meaning then/so, inversion is possible:

• Jeg arbejder ikke på fredag. Så bliver jeg hjemme.

That version is also natural, but it is structured a little differently.

So:

• ..., så jeg bliver hjemme. = one sentence with so
• ... . Så bliver jeg hjemme. = two sentences, with Så starting the second one

Because bliver hjemme means stay at home, while er hjemme means am at home.

So the difference is:

• Jeg bliver hjemme = I’m staying home
• Jeg er hjemme = I’m at home

In this sentence, the speaker is talking about a decision or plan: since they are not working, they will stay home. That is why bliver hjemme fits better.

No. Blive is a very common verb with several meanings.

It can mean:

• become
• remain
• stay

In this sentence:

• jeg bliver hjemme

it means I stay home or I remain at home, not I become home.

Other examples:

• Jeg bliver træt. = I’m getting tired / I become tired
• Bliv her. = Stay here
• Han bliver i sengen. = He stays in bed

So you have to learn the meaning from the context.

Because hjemme is used for location, while hjem is often used for movement toward home.

Compare:

• Jeg er hjemme. = I am at home
• Jeg bliver hjemme. = I stay home
• Jeg går hjem. = I go home
• Jeg kører hjem. = I drive home

So in your sentence, there is no movement to home. The speaker is remaining there, so hjemme is correct.

Yes. Danish often moves time expressions to the front for emphasis.

So you can say:

• På fredag arbejder jeg ikke, så jeg bliver hjemme.

Notice what happens when på fredag moves to the front: Danish keeps its verb-second word order, so the verb comes before the subject:

• På fredag arbejder jeg ikke

not:

• På fredag jeg arbejder ikke

This is a very important Danish pattern.

Because the second part is a full clause, and Danish normally needs an explicit subject there.

So:

• Jeg arbejder ikke på fredag, så jeg bliver hjemme.

has two clauses:

1. Jeg arbejder ikke på fredag
2. jeg bliver hjemme

In English, we also normally repeat the subject:

• I’m not working on Friday, so I’m staying home.

You might sometimes leave things out in very casual speech, but standard Danish keeps jeg.

Because the sentence contains two full clauses, and the comma separates them:

• Jeg arbejder ikke på fredag
• så jeg bliver hjemme

In standard written Danish, this comma is natural and expected here.

So the comma helps show the structure:

• first idea: I’m not working on Friday
• result: so I’m staying home

It is especially useful because both parts could stand as complete statements on their own.