Ons moet nou ingaan.

A word-for-word breakdown is:

• Ons = we
• moet = must / have to
• nou = now
• ingaan = go in / enter

So the sentence means We must go in now or We have to go inside now.

It can mean either, depending on context.

In English, must can sound stronger or more formal, while have to is often more natural in everyday speech. Afrikaans moet covers both ideas very often.

So Ons moet nou ingaan could be understood as:

• We must go in now
• We have to go in now

The exact feeling depends on the situation and tone of voice.

In a normal Afrikaans main clause, the finite verb usually comes in the second position.

So in:

• Ons = subject
• moet = finite verb
• nou = time word
• ingaan = infinitive at the end

This follows a very common Afrikaans pattern:

Subject + finite verb + other information + infinitive

So:

• Ons moet nou ingaan

is a very normal sentence structure.

Because moet is a modal verb, and in Afrikaans modal verbs usually send the other verb to the end in its infinitive form.

Compare:

• Ons gaan in. = We go in.
• Ons moet nou ingaan. = We must go in now.

When ingaan is used with a modal like moet, it stays together as ingaan and goes to the end.

Ingaan is a verb meaning to go in or to enter.

It is built from:

• in = in
• gaan = go

This is useful because in some sentence patterns the parts separate, and in others they stay together.

For example:

• Ons gaan nou in. = We are going in now.
  Here the verb is split.

But:

• Ons moet nou ingaan. = We must go in now.
  Here it stays together because it comes after moet.

Here it is written as one word because it is being used as an infinitive after moet.

So:

• moet ingaan = must go in

But when the verb is conjugated in a main clause, the parts can separate:

• Ons gaan nou in.

That difference is very common in Afrikaans with verbs like this.

Yes. Nou often means now, but in real usage it can also have slightly different shades depending on context, such as:

• now
• right now
• at this point
• sometimes a discourse word like well, now

In Ons moet nou ingaan, the most natural meaning is simply now or right now.

Yes.

Possible translations include:

• We must go in now
• We have to go inside now
• We must enter now

Go in is usually the most natural everyday English translation.
Enter is correct, but sounds a bit more formal.

Usually, yes.

Ons means we / us depending on the sentence:

• Ons moet nou ingaan. = We must go in now.
• Hy sien ons. = He sees us.

Unlike some languages, Afrikaans does not normally make a special distinction between we including you and we excluding you. Context tells you that.

Because after modal verbs such as moet, Afrikaans uses the bare infinitive.

So you say:

• Ons moet ingaan
• Ek kan kom
• Sy wil bly

not forms with an extra word meaning to.

That is similar to English:

• We must go
• not We must to go

The negative would be:

• Ons moet nie nou ingaan nie.

Afrikaans usually uses a double negative pattern:

• nie after the finite verb area
• another nie at the end

So:

• Ons moet nou ingaan. = We must go in now.
• Ons moet nie nou ingaan nie. = We must not go in now.

A simple pronunciation guide is:

• Ons ≈ ons
• moet ≈ moot
• nou ≈ something like now
• ingaan ≈ in-khaan or in-ghaan, with the g being the throaty Afrikaans g

A rough English-friendly version could be:

ons moot now in-ghaan

The hardest part for English speakers is usually the g sound in gaan. It is not like the English g in go. It is a guttural sound made further back in the throat.