Ons nooi haar môre vir aandete, sodat sy saam met ons kan eet.

Because Afrikaans distinguishes between the object form and the subject form of she/her:

• sy = she (subject)
• haar = her (object)

So:

• Ons nooi haar = We invite her
• sodat sy ... kan eet = so that she can eat ...

English does the same: we invite her, but she can eat.

vir aandete means for dinner or for the evening meal.

Here, vir belongs with aandete. It is not connected to haar. So the structure is:

• Ons nooi haar = We invite her
• môre = tomorrow
• vir aandete = for dinner

A learner may expect something like Ons nooi vir haar... because Afrikaans often uses vir before human direct objects, especially in everyday speech.

But in this sentence, Ons nooi haar... is also fine. In fact, many speakers prefer it here because vir aandete already follows, and using vir twice close together can sound heavy:

• Ons nooi haar môre vir aandete = neat and natural
• Ons nooi vir haar môre vir aandete = possible in some usage, but less elegant here

So haar is simply the object of nooi.

Because Afrikaans often puts time expressions fairly early in the clause.

So Ons nooi haar môre vir aandete sounds natural: first the action, then the person, then the time, then the occasion.

You may also hear other orders, such as Ons nooi haar vir aandete môre, but that changes the rhythm and emphasis a bit. The version in your sentence is very normal.

Yes. môre can mean either tomorrow or morning, depending on context.

In this sentence, it means tomorrow, not morning. The context makes that clear.

For example:

• Goeie môre = Good morning
• Sien jou môre = See you tomorrow

sodat means so that.

It introduces a clause of purpose or intended result. In this sentence, it explains why they are inviting her:

• Ons nooi haar môre vir aandete = We invite her tomorrow for dinner
• sodat sy saam met ons kan eet = so that she can eat together with us

So sodat links the invitation to its purpose.

Because sodat introduces a subordinate clause, and in Afrikaans these clauses are normally separated by a comma in writing.

So the comma helps show the structure:

• main clause: Ons nooi haar môre vir aandete
• subordinate clause: sodat sy saam met ons kan eet

Because after a subordinating conjunction like sodat, Afrikaans uses subordinate-clause word order.

That means the verb part moves toward the end of the clause:

• Main clause: Sy kan saam met ons eet.
• Subordinate clause: ... sodat sy saam met ons kan eet.

So after sodat, you get:

• sy = subject
• saam met ons = adverbial phrase
• kan eet = verb cluster at the end

This is very typical Afrikaans and one of the most important word-order patterns to learn.

Because kan is a modal verb (can), and eet is the main verb (eat).

In Afrikaans subordinate clauses, these verbs usually stay together at the end, with the modal before the infinitive:

• kan eet = can eat
• wil gaan = want to go
• moet werk = must work

So sodat sy saam met ons kan eet is the normal pattern.

Using kan adds the idea of being able to or having the opportunity to.

So:

• sodat sy saam met ons kan eet = so that she can eat with us

This sounds natural when the invitation is meant to make that possible.

If you said sodat sy saam met ons eet, it would sound more like so that she eats with us or with the result that she eats with us, which is less natural in this context.

saam met ons means together with us.

• saam = together
• met = with
• ons = us

In Afrikaans, when you say together with someone, the normal pattern is saam met + person/pronoun.

So:

• saam met ons = together with us
• saam met haar = together with her

You would not normally say saam ons.

It means the evening meal.

Depending on your variety of English, that may be translated as:

• dinner
• supper

In many learning contexts, aandete is translated as dinner, but supper can also be a good English equivalent.

Yes. Afrikaans often allows different word orders or alternative purpose structures.

For example:

• Ons nooi haar môre vir aandete sodat sy saam met ons kan eet.
• Ons nooi haar môre vir aandete om saam met ons te eet.

Both are possible, but they are not identical in feel:

• sodat sy ... kan eet emphasizes the purpose/result
• om ... te eet is a more direct to eat structure

The sentence you were given is natural and idiomatic.