Le plombier va déboucher l’évier demain matin.

Va déboucher is the near future (also called the futur proche). It is formed with:

aller + infinitive

So:

• va = is going
• déboucher = to unclog / to unblock

Together, va déboucher means is going to unclog.

French uses this structure very often in everyday speech, especially for something that is expected or planned.

Compare:

• Le plombier va déboucher l’évier demain matin. = The plumber is going to unclog the sink tomorrow morning.
• Le plombier débouchera l’évier demain matin. = The plumber will unclog the sink tomorrow morning.

Both are correct, but va déboucher often sounds more conversational and immediate.

Because after aller when it is used to make the near future, French uses the infinitive directly, with no preposition.

Pattern:

• je vais manger
• tu vas partir
• il va travailler

So here:

• Le plombier va déboucher l’évier

not:

• Le plombier va à déboucher ❌

This is just how the near-future structure works in French.

In French, a singular countable noun usually needs an article when it is used normally in a sentence.

So French says:

• Le plombier = the plumber

You generally cannot just say:

• Plombier va déboucher l’évier ❌

That sounds incomplete in French.

Also, plombier means plumber, and here it refers to a specific plumber known from the context, so the plumber is natural.

Because évier begins with a vowel sound, and French usually shortens le or la before a vowel.

This is called elision.

So:

• le évier becomes l’évier

Other examples:

• l’école instead of la école
• l’ami instead of le ami

So l’évier means the sink.

You have to know the gender of the noun itself. Évier is masculine.

So in full form it is:

• le évier → l’évier

If it were feminine, it would come from la instead.

Because both le and la become l’ before a vowel, you cannot tell the gender just from l’ alone. You need to know the noun:

• un évier
• le grand évier
• cet évier

Those forms make the masculine gender clearer.

Here, déboucher means to unclog, to clear, or to unblock.

With l’évier, the idea is that the sink is blocked and the plumber will make water pass through it again.

Be careful: déboucher can have other meanings in other contexts, for example:

• déboucher une bouteille = to uncork / open a bottle
• une rue qui débouche sur la place = a street that opens onto the square

So the exact meaning depends on the object. With un évier, it clearly means to unclog the sink.

That is a very common place for a time expression in French.

The sentence structure here is:

• Le plombier = subject
• va déboucher = verb phrase
• l’évier = object
• demain matin = time expression

Putting the time phrase at the end sounds very natural:

• Le plombier va déboucher l’évier demain matin.

French can sometimes move time expressions for emphasis, for example:

• Demain matin, le plombier va déboucher l’évier.

That is also correct. The version with demain matin at the end is simply the more neutral word order.

Yes. Demain matin means tomorrow morning.

It works as a set time expression:

• demain = tomorrow
• matin = morning

Together:

• demain matin = tomorrow morning

French often uses time expressions without a preposition in cases like this.

Compare:

• aujourd’hui = today
• demain = tomorrow
• ce matin = this morning
• demain matin = tomorrow morning
• lundi prochain = next Monday

So you do not need in, on, or at the way English often does.

Yes. You could say:

• Le plombier débouchera l’évier demain matin.

That uses the simple future (futur simple) of déboucher.

Difference in feel:

• va déboucher = very common in spoken French, often sounds more immediate or planned
• débouchera = also correct, sometimes a bit more formal or simply more written in tone

In many everyday situations, either one could work.

A simple pronunciation guide would be:

luh plom-byay va day-boo-shay lay-vyay duh-man ma-tan

A few useful points:

• plombier sounds roughly like plom-byay
• déboucher ends with -ay sound
• l’évier sounds roughly like lay-vyay
• demain sounds like duh-man
• matin ends with a nasal vowel, roughly ma-tan but without a strong final n

A more IPA-style version is:

lə plɔ̃bje va debuʃe levje dəmɛ̃ matɛ̃

You do not usually make a strong pause inside the sentence.

Yes, two things are especially useful:

1. Plombier is a profession noun

   • un plombier = a plumber
     Do not confuse it with English words related to plumbing; the French word is built differently.

2. Évier is specifically a sink, usually a kitchen sink
   Depending on context, English might say sink without specifying type, but in French évier is the normal word here.

Also, remember the genders:

• un plombier (masculine noun for the profession word)
• un évier (masculine)

So in the sentence:

• Le plombier
• l’évier (from le évier)

Yes, absolutely.

You can say:

• Demain matin, le plombier va déboucher l’évier.

This puts a little more focus on when it will happen.

Both versions are correct:

• Le plombier va déboucher l’évier demain matin.
• Demain matin, le plombier va déboucher l’évier.

The first is neutral and very common. The second highlights the time a bit more.