Si nous ne réparons pas ce tuyau aujourd’hui, les gouttes vont encore mouiller le sol demain.

In French, after si meaning if, you normally do not use the future tense for a real condition.

So French uses this pattern:

• si + present
• future / near future / imperative in the main clause

That is exactly what happens here:

• Si nous ne réparons pas ce tuyau aujourd’hui...
• ...les gouttes vont encore mouiller le sol demain.

A native English speaker often expects if we will not repair, but French does not say it that way in normal usage.

Vont mouiller is the near future: aller + infinitive.

• vont mouiller = are going to wet
• mouilleront = will wet

Both are grammatically possible here. The near future often feels a little more immediate, concrete, or likely. It can sound natural when talking about a consequence that is expected to happen soon.

So:

• les gouttes vont encore mouiller le sol demain = the drops are going to wet the floor again/still tomorrow
• les gouttes mouilleront encore le sol demain would also be correct

Here encore most likely means again or still, depending on context.

In this sentence, it suggests that the floor has already been getting wet, and if the pipe is not repaired, that will continue tomorrow.

So the idea could be:

• again: the drops will wet the floor again tomorrow
• still: the drops will still be wetting the floor tomorrow

French encore often covers both ideas, and context tells you which nuance is strongest.

French basic negation is usually built with ne ... pas around the conjugated verb.

Here the verb is réparons, so:

• nous réparons = we repair / we are repairing
• nous ne réparons pas = we do not repair / we are not repairing

So the negative wraps around the conjugated verb:

• ne before the verb
• pas after the verb

In everyday spoken French, people often drop ne, but in standard written French it is normally kept.

French uses:

• ce before most masculine singular nouns
• cet before masculine singular nouns that begin with a vowel sound
• cette for feminine singular nouns

Since tuyau is masculine singular and begins with the consonant sound t, you use ce:

• ce tuyau

You would use cet in something like:

• cet arbre
• cet homme

Tuyau often means pipe, tube, or hose, depending on context.

In this sentence, because we are talking about drops wetting the floor, tuyau naturally suggests a leaking pipe.

So ce tuyau here is best understood as this pipe.

French adverbs of time like aujourd’hui and demain are often placed after the main part of the clause, especially in ordinary neutral word order.

So:

• Si nous ne réparons pas ce tuyau aujourd’hui...

sounds very natural.

You could move aujourd’hui for emphasis in some contexts, but this version is straightforward and standard.

Placing demain at the end is a very common and natural way to add the time reference in French.

• les gouttes vont encore mouiller le sol demain

This is similar to how English often puts time expressions at the end:

• ...will wet the floor tomorrow

French word order is somewhat flexible, but the final position is very normal here.

Les gouttes focuses on the individual drops falling from the leak. It paints a more specific picture than l’eau.

• les gouttes = the drops
• l’eau = the water

Using les gouttes suggests repeated dripping, which fits well with the idea of a leaking pipe.

Yes, both can refer to a floor, but they are not exactly the same.

• le sol = the ground / the floor in a general sense
• le plancher = a wooden floor, or more specifically a floor structure/surface

In this sentence, le sol is a general and natural choice for the floor.

If you wanted to emphasize a wooden indoor floor, plancher might be possible in some contexts, but sol is broader and very common.

Yes. In everyday spoken French, on is very often used instead of nous for we.

So you could hear:

• Si on ne répare pas ce tuyau aujourd’hui, les gouttes vont encore mouiller le sol demain.

That sounds very natural in conversation.

The version with nous is also correct, and it sounds a bit more formal or careful.

It is standard and helpful here.

When a conditional clause comes first, French often separates it with a comma:

• Si nous ne réparons pas ce tuyau aujourd’hui, les gouttes vont encore mouiller le sol demain.

The comma makes the structure clearer and matches the pause you would naturally make when reading it.

Yes. It is a standard real condition pattern, often compared to the English first conditional.

The structure is:

• Si + present
• future / near future / imperative / present depending on meaning

Here it is:

• Si nous ne réparons pas ce tuyau aujourd’hui
• les gouttes vont encore mouiller le sol demain

So the sentence expresses a realistic consequence of a possible situation.

In French, the present tense often covers both ideas that English separates:

• we do not repair
• we are not repairing

So nous ne réparons pas can be understood from context. In this sentence, the most natural meaning is if we do not repair this pipe today.

That is because the sentence is about whether the repair gets done by today, not about what is happening at this exact moment.