Forse è semplicemente sotto la sedia.

Because è with an accent is the verb essere (to be) in the he/she/it is form.

• è = is
• e = and

The accent matters a lot here. Without it, the sentence would be incorrect.

Italian often drops the subject pronoun when it is already understood from the verb.

So:

• È semplicemente sotto la sedia = It is simply under the chair

The è already tells you it means is, so Italian usually does not need to say esso or another explicit pronoun. This is very normal in Italian.

Forse means maybe or perhaps.

In this sentence, it appears at the beginning:

• Forse è semplicemente sotto la sedia.

That is very natural. Italian is fairly flexible with adverbs like forse, so you may also hear:

• È forse semplicemente sotto la sedia.

But placing forse at the beginning is one of the most common and neutral choices.

Semplicemente means simply.

Its position before sotto la sedia makes it modify the whole idea that follows:

• è semplicemente sotto la sedia = it is simply under the chair

In other words, the speaker is saying there may be no complicated explanation: it may just be there.

Italian adverb placement is somewhat flexible, but this order sounds very natural.

After sotto (under), Italian very often uses the article directly:

• sotto la sedia
• sotto il tavolo
• sotto il letto

This is the most straightforward and common pattern.

You may also sometimes hear forms like sotto alla sedia, but sotto la sedia is simpler and very natural. For a learner, this is the safest version to use first.

Here it means location: the thing is under the chair.

The full sentence describes where something is:

• È sotto la sedia = It is under the chair

If you wanted to emphasize movement toward that place, Italian would usually make that clearer from context or with a different structure, for example using a motion verb.

La sedia means the chair, so it refers to a specific chair that speaker and listener can identify.

• la sedia = the chair
• una sedia = a chair

If the sentence said sotto una sedia, it would mean under a chair, which sounds less specific.

Sometimes yes, depending on tone and context.

• È sotto la sedia is completely normal.
• Sta sotto la sedia can also be heard, especially when emphasizing where something is located.

For learners, è sotto la sedia is perfectly correct and very standard.
Using essere for location is common and safe.

A helpful approximate pronunciation is:

sem-plee-che-men-te

More roughly in English-friendly terms:

• sem like sem in semester
• pli like plee
• ce here sounds like che in check
• men as written
• te like teh

The stress falls on -men-:

sem-pli-che-MEN-te

Sedia is pronounced approximately:

SEH-dyah

Important point: the di + a combination here sounds like dya, not like a hard separate dee-ah in careful everyday speech.

So:

• sedia ≈ SEH-dyah

The stress is on the first syllable: SE-

It is neutral and works in both formal and informal situations.

Nothing in the sentence is especially casual, slangy, or literary. It is just a normal everyday Italian sentence:

• Forse = maybe/perhaps
• è = is
• semplicemente = simply
• sotto la sedia = under the chair

So you could use it in conversation, writing, or explanation without sounding odd.

Yes.

• Forse è sotto la sedia. = Maybe it’s under the chair.
• Forse è semplicemente sotto la sedia. = Maybe it’s simply under the chair.

Adding semplicemente gives the sentence a nuance of it may be nothing more than that or the explanation may be very simple.

A simple breakdown is:

• Forse = adverb (maybe / perhaps)
• è = verb (is)
• semplicemente = adverb (simply)
• sotto la sedia = prepositional phrase (under the chair)

So the sentence structure is basically:

Maybe + is + simply + under the chair

That is a very normal Italian word order for this kind of statement.