Je me demande où j’ai mis l’adaptateur, et nous cherchons une rallonge parce que la prise est trop loin du canapé.

Se demander is a reflexive verb expression that means to wonder or literally to ask oneself.

So je me demande is not I ask me in the normal sense. It is the standard way to say I wonder.

• je me demande = I wonder
• tu te demandes = you wonder
• nous nous demandons = we wonder

The me is the reflexive pronoun that matches je.

Où with a grave accent means where.

Without the accent, ou means or.

So the accent is important because it distinguishes two different words:

• où = where
• ou = or

Because this is an indirect question, not a direct question.

After expressions like je me demande, French keeps normal statement word order:

• Je me demande où j’ai mis l’adaptateur.

If you asked the question directly, you could say:

• Où ai-je mis l’adaptateur ?
• Où est-ce que j’ai mis l’adaptateur ?
• J’ai mis l’adaptateur où ? (more informal)

So after je me demande, you do not use inversion.

J’ai mis is the passé composé, which is very commonly used for a completed past action.

It is formed with:

• avoir in the present: j’ai
• the past participle of mettre: mis

So:

• mettre = to put
• j’ai mis = I put / I have put

It is used here because the action of putting the adapter somewhere happened earlier, and now the speaker is wondering where that happened.

Because mettre is irregular in the past participle.

• mettre → mis

This is just something you have to learn as a verb form.

A few examples:

• J’ai mis le livre sur la table.
• Nous avons mis les clés dans le sac.

Also, because mettre takes avoir in the passé composé, mis normally does not agree with the subject here.

L’ is the definite article, from le or la, used before a vowel sound.

So:

• le adaptateur is impossible
• it becomes l’adaptateur

The definite article is used because the speaker has a specific adapter in mind, not just any adapter.

Compare:

• Je cherche un adaptateur. = I’m looking for an adapter, any one.
• Je me demande où j’ai mis l’adaptateur. = I’m wondering where I put the adapter, the specific one.

Because the searching is happening now.

Nous cherchons is the present tense of chercher:

• je cherche
• tu cherches
• il/elle cherche
• nous cherchons
• vous cherchez
• ils/elles cherchent

French often uses the simple present where English might say we are looking for.

So nous cherchons can correspond to:

• we look for
• we are looking for

depending on context.

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

So these both work:

• nous cherchons une rallonge
• on cherche une rallonge

Both mean the same thing here.
Nous is a bit more formal or careful; on is more common in casual speech.

In this context, une rallonge means an extension cord or extension lead.

By itself, rallonge can mean something that extends or lengthens something. In everyday household context, people often understand une rallonge as une rallonge électrique, even if électrique is not stated.

So the noun comes from the idea of making something longer.

Parce que introduces the reason: because.

It connects the two ideas:

• we are looking for an extension cord
• because the outlet is too far from the sofa

You could sometimes use car in writing, but parce que is more common and more natural in everyday speech.

• parce que = because
• car = for / because, but more formal or written

Yes. Prise can mean different things depending on context.

Here, la prise means an electrical outlet / socket.

That makes sense because the sentence also mentions:

• adaptateur
• rallonge
• distance from the sofa

So the context makes it clear that this is an electrical plug socket/outlet, not another meaning of prise.

Also note that prise is feminine:

• la prise

Because de + le contracts to du.

The expression is loin de = far from.
So:

• loin de le canapé → incorrect
• loin du canapé → correct

This is a standard contraction in French:

• de + le = du
• de + les = des

Examples:

• près du lit
• loin du canapé
• à côté des chaises

Trop loin means too far.

• loin = far
• trop loin = too far

With être, French can use loin to describe location or distance:

• La gare est loin.
• La prise est trop loin du canapé.

So even though loin is often thought of as an adverb, this structure is completely normal after être.

Also compare:

• loin = far
• très loin = very far
• trop loin = too far

Here trop is important because the distance causes a problem, which is why they need an extension cord.

The comma is optional stylistically, but it is natural here because the sentence is fairly long and joins two related clauses:

• Je me demande où j’ai mis l’adaptateur
• et nous cherchons une rallonge...

French punctuation is often a bit more flexible than learners expect in cases like this. The comma helps readability, but the sentence could also be written without it.

J’ai is pronounced like zhay in a rough English approximation.

It comes from:

• je ai → impossible in normal French
• so it becomes j’ai

This is called elision: je loses its e before a vowel sound.

You will see this often:

• j’ai
• j’aime
• j’habite
• j’oublie

So j’ai mis is pronounced smoothly, not as two fully separate words.