Nous faisons un voyage demain.

Yes—faire often means to do or to make, but French uses it in many fixed expressions where English uses a different verb.

Here, faire un voyage means to take/make a trip.

So:

• nous faisons = we do / we make
• un voyage = a trip / a journey

A native English speaker may expect a verb like to travel, but French often uses faire in expressions like this.

That said, while faire un voyage is grammatical, in everyday French people often prefer other ways to say this idea, such as:

• Nous partons en voyage demain. = We’re going on a trip tomorrow.
• Nous voyageons demain. = We’re traveling tomorrow.

So the sentence is correct, but not always the most natural everyday phrasing.

French often uses the present tense to talk about the near future when there is a clear time expression like demain (tomorrow).

So Nous faisons un voyage demain literally looks like We are making a trip tomorrow, but it is understood as We’re taking a trip tomorrow or We’re going on a trip tomorrow.

This works the same way as in English when we say:

• We leave tomorrow
• I see her next week

The time word demain makes the future meaning clear.

Yes. You could also say:

• Nous ferons un voyage demain.

That uses the simple future of faire.

The difference is mostly about style and context:

• Nous faisons un voyage demain = present used for a planned future event
• Nous ferons un voyage demain = more explicitly future

Both are possible, though in everyday speech French often likes the present tense or the futur proche:

• Nous allons faire un voyage demain.

Because voyage is a countable noun here: a trip.

So:

• un voyage = a trip
• le voyage = the trip
• des voyages = trips

In this structure, French normally needs an article. You usually would not say Nous faisons voyage demain.

Compare:

• faire un voyage = to take a trip
• partir en voyage = to go on a trip

In the second expression, French uses en voyage, not un voyage.

Voyage is masculine, which is why it takes un:

• un voyage

If it were feminine, it would take une.

You can often tell the gender from the article in the sentence.

Very often, yes. In spoken French, people commonly use on instead of nous for we.

So in conversation, you might hear:

• On fait un voyage demain.

That is often more natural in casual speech.

The difference is roughly:

• nous = more formal, more written, still very common and correct
• on = very common in everyday spoken French

So Nous faisons un voyage demain is correct, but On fait un voyage demain may sound more conversational.

Because faisons is the first-person plural present-tense form of faire.

Here is the present tense of faire:

• je fais
• tu fais
• il / elle / on fait
• nous faisons
• vous faites
• ils / elles font

So:

• nous faisons = we do / we make

This is an irregular verb, so the forms have to be memorized.

It is understandable and grammatical, but many learners should know that French often prefers other expressions depending on the exact meaning.

Common alternatives:

• Nous partons en voyage demain.
  Very natural for We’re going on a trip tomorrow.

• Nous allons voyager demain.
  We’re going to travel tomorrow.

• Nous voyageons demain.
  We’re traveling tomorrow.

• Nous allons faire un voyage demain.
  Also possible, especially if you want going to take a trip.

So faire un voyage is not wrong, but it can sound a bit less idiomatic than partir en voyage in many situations.

Putting demain at the end is a very normal French word order.

French often places time expressions after the main part of the sentence:

• Nous faisons un voyage demain.
• Je travaille lundi.
• Ils arrivent ce soir.

But demain can also be moved for emphasis:

• Demain, nous faisons un voyage.

That sounds like Tomorrow, we’re taking a trip.

So the end position is neutral and natural, while the front position gives extra emphasis to the time.

A simple pronunciation guide is:

Nous faisons un voyage demain
nu fə-zɔ̃ œ̃ vwa-yazh də-mɛ̃

A few useful points:

• nous sounds like noo
• faisons has a z sound in the middle: fə-zɔ̃
• un is a nasal vowel; English does not have an exact match
• voyage sounds roughly like vwah-yazh
• demain ends with a nasal sound too: də-mɛ̃

Also, there is a liaison between faisons and un, so it flows like:

faisons-un

Not directly in this sentence.

• voyage = a noun = trip / journey
• voyager = a verb = to travel

So:

• Nous faisons un voyage demain. = noun structure
• Nous voyageons demain. = verb structure

Both are possible, but they are built differently.

You cannot say:

• Nous faisons voyager demain

because that would mean something different or be incomplete.