Morgen grillen wir.

In a main clause, German normally puts the finite verb in second position. This is called the V2 rule.

• Wir grillen morgen. = subject first, verb second
• Morgen grillen wir. = time expression first, verb still second

So when Morgen is moved to the front for emphasis or style, grillen must stay in second position, and wir comes after it.

Here Morgen functions as an adverb of time, meaning tomorrow.

A common source of confusion is that morgen can also relate to morning, but at the start of a sentence both would be capitalized anyway, so capitalization does not help here.

In this sentence, Morgen grillen wir., the natural meaning is Tomorrow we’re grilling / We’re grilling tomorrow.

German very often uses the present tense to talk about the future, especially when there is a clear time expression like morgen, heute Abend, nächste Woche, and so on.

So:

• Morgen grillen wir.

is completely normal German for a future event.

English often does something similar:

• We’re grilling tomorrow.

Yes, you can. It is grammatically correct.

• Morgen grillen wir.
• Wir werden morgen grillen.

Both can refer to the future. But in everyday German, the present tense version is usually more natural when the time is already clear.

Using werden + infinitive can sometimes sound a bit more formal, more deliberate, or more predictive, but it is not necessary here.

Yes. That is also correct and very natural.

• Wir grillen morgen.
• Morgen grillen wir.

The difference is mainly emphasis:

• Wir grillen morgen. → neutral, starting with the subject
• Morgen grillen wir. → emphasizes tomorrow

German often moves elements to the first position to highlight them.

Here grillen means to grill or, more idiomatically in context, to have a barbecue / cook on the grill.

The sentence does not mention what is being grilled. That is perfectly normal. German can use grillen without stating an object when the meaning is general:

• Wir grillen. = We’re grilling / We’re having a barbecue.

So Morgen grillen wir. means something like We’re grilling tomorrow.

Because the speaker is talking about the activity in general, not specifically naming the food.

This is very natural in German, just as in English:

• We’re grilling tomorrow.
• Morgen grillen wir.

If you want, you can add an object:

• Morgen grillen wir Würstchen. = Tomorrow we’re grilling sausages.
• Morgen grillen wir Gemüse. = Tomorrow we’re grilling vegetables.

Yes, grillen is the infinitive, but it is also the correctly conjugated form for wir in the present tense.

The verb grillen is conjugated like this:

• ich grille
• du grillst
• er/sie/es grillt
• wir grillen
• ihr grillt
• sie/Sie grillen

So in Morgen grillen wir, grillen is not an infinitive—it is the finite verb form for wir.

Yes, absolutely. It is a complete and natural German sentence.

It has:

• a time expression: Morgen
• a finite verb: grillen
• a subject: wir

German often allows short, compact sentences when the context is clear.

In a subordinate clause, German sends the finite verb to the end.

For example:

• Ich weiß, dass wir morgen grillen.
  = I know that we’re grilling tomorrow.

Notice the difference:

• main clause: Morgen grillen wir.
• subordinate clause: ..., dass wir morgen grillen.

So the V2 rule applies to main clauses, but not to subordinate clauses.

A natural pronunciation is roughly:

MOR-gen GRIL-len veer

A few points:

• Morgen has stress on the first syllable: MOR-gen
• grillen has stress on the first syllable: GRIL-len
• w in German sounds like English v, so wir sounds like veer

If Morgen is fronted for emphasis, it may get a bit more stress:

• MORGEN grillen wir.

In theory, context can sometimes make things ambiguous, because Morgen at the beginning of a sentence is capitalized either way. But in this sentence, the normal interpretation is tomorrow.

If you specifically want to say in the morning, German more often uses expressions like:

• am Morgen
• morgens

For example:

• Morgens grillen wir selten. = We rarely grill in the mornings.
• Am Morgen grillen wir nicht. = We don’t grill in the morning.

So Morgen grillen wir. is normally understood as Tomorrow we’re grilling.

Very literally, it is:

• Morgen = tomorrow
• grillen = grill
• wir = we

So the structure is:

Tomorrow grill we.

That sounds wrong in English, but it is normal in German because the verb must stay in second position in a main clause. The natural English translation is:

We’re grilling tomorrow or Tomorrow we’re grilling.