De baby gaat eindelijk slapen.

In standard Dutch, baby is a de-word, so the correct definite article is de: de baby.

A useful extra point:

• If you use the diminutive, it becomes het baby’tje, because all Dutch diminutives take het.

So:

• de baby = the baby
• het baby’tje = the little baby

Yes, gaat is the present-tense form of gaan, which literally means to go. But in Dutch, gaan + infinitive is also a very common way to talk about:

• something that is about to happen
• the start of an action

So gaat slapen means something like:

• is going to sleep
• goes to sleep
• starts sleeping

In this sentence, it does not necessarily emphasize physical movement. It is more about the baby entering the state of sleep.

Because gaat is the conjugated verb, and after gaan in this kind of structure, the second verb stays in the infinitive.

So:

• De baby gaat slapen = correct
• De baby gaat slaapt = incorrect

This is similar to English patterns like is going to sleep, where only one verb is fully inflected and the other stays in its base form.

Dutch main clauses normally follow the verb-second rule. That means the finite verb comes in the second position of the clause.

Here:

• De baby = first element
• gaat = second element
• eindelijk slapen = the rest

So De baby gaat eindelijk slapen is following normal Dutch main-clause word order.

You can also move another element to the front, but then the verb still stays second:

• Eindelijk gaat de baby slapen.

Eindelijk is an adverb, and in a normal Dutch main clause it often comes after the finite verb.

So:

• De baby gaat eindelijk slapen = very natural

If you move eindelijk to the front:

• Eindelijk gaat de baby slapen

that is also correct, but it gives eindelijk a bit more emphasis.

So the original sentence is neutral and natural, while the fronted version is more emphatic.

The difference is about process versus state.

• De baby gaat eindelijk slapen = the baby is finally going to sleep / falling asleep / starting to sleep
• De baby slaapt eindelijk = the baby is finally sleeping

So:

• gaat slapen focuses on the moment of transition
• slaapt focuses on the result or ongoing state

This is a very important distinction in Dutch.

Because after gaan in this construction, Dutch uses a bare infinitive, not te + infinitive.

So:

• Ik ga eten = correct
• Ik ga slapen = correct
• Ik ga te eten = incorrect
• Ik ga te slapen = incorrect

This is something English speakers often need to get used to, because Dutch does not always match English infinitive patterns.

Grammatically, it is present tense, because gaat is a present-tense form.

But in meaning, gaan + infinitive often points to the near future or the start of an action. So this sentence can feel a bit future-like in English:

• The baby is finally going to sleep

At the same time, it can also feel like the baby is finally falling asleep right now, depending on context.

So the form is present, but the meaning often looks forward to the next action.

Yes, absolutely. Nu can be added if you want to make the timing more explicit:

• De baby gaat eindelijk slapen = The baby is finally going to sleep.
• De baby gaat nu eindelijk slapen = The baby is finally going to sleep now.

Adding nu can make it sound more immediate or more strongly connected to the current moment.

A direct negative version would be:

• De baby gaat niet slapen. = The baby is not going to sleep.

If you want to keep the idea of frustration or delay, a more natural sentence is often:

• De baby gaat nog steeds niet slapen. = The baby still isn’t going to sleep.

You technically could build a sentence with eindelijk and niet, but in real usage that often sounds odd unless the context is very specific. So for learners, nog steeds niet is often the more useful pattern here.