Ni kontrolas, ĉu la fokuso estas klara aŭ ne.

Ĉu introduces an indirect yes-no question. Here it works like English whether or sometimes if:

• Ni kontrolas = we are checking / we check
• ĉu la fokuso estas klara aŭ ne = whether the focus is clear or not

So the whole sentence means that we are checking whether something is true.

Because Esperanto keeps these two ideas separate:

• ĉu = whether / if in a yes-no question
• se = if in a condition

English uses if for both, but Esperanto normally does not.

So:

• Ni kontrolas, ĉu la fokuso estas klara = We check whether the focus is clear
• Se la fokuso estas klara, ni daŭrigas = If the focus is clear, we continue

That distinction is very useful for learners.

The ending -as marks the present tense in Esperanto.

• kontrolas = check / are checking
• estas = is / are / am

Esperanto verbs do not change for person or number, so the same form is used with mi, vi, li, ŝi, ĝi, ni, ili.

For example:

• mi kontrolas
• ni kontrolas
• ili kontrolas

All use kontrolas.

Because ĉu la fokuso estas klara aŭ ne is a subordinate clause, and Esperanto often separates subordinate clauses with commas.

So the comma helps show the structure:

• main clause: Ni kontrolas
• subordinate clause: ĉu la fokuso estas klara aŭ ne

You may sometimes see slight variation in punctuation in informal writing, but this comma is normal and recommended.

La is the definite article, meaning the. It shows that the speaker is talking about a specific focus, not just focus in general.

So la fokuso means the focus, probably the one already being discussed or the one visible in the situation.

A useful reminder: Esperanto has

• la = the
• no separate word for a / an

So:

• fokuso = focus
• la fokuso = the focus

Because klara is an adjective, and here it describes la fokuso.

After estas, Esperanto usually uses an adjective to describe the subject:

• la fokuso estas klara = the focus is clear

If you used klare, that would be an adverb, and adverbs describe verbs, adjectives, or whole situations, not nouns.

So:

• klara = clear, as a quality of a thing
• klare = clearly, in a manner

In this sentence, we need the adjective form.

Because la fokuso is the subject of the clause la fokuso estas klara aŭ ne, not a direct object.

In Esperanto, -n usually marks a direct object. But after estas, the noun before it is often the subject:

• la fokuso estas klara
  • la fokuso = subject
  • klara = predicate adjective

Even though the whole ĉu clause is what is being checked, inside that clause la fokuso is still the subject, so no -n is used.

Because it is linked to the subject through estas, not acting as a direct object.

In Esperanto, predicate adjectives agree with the noun they describe in number and case. Since fokuso is singular and has no -n, klara is also singular and has no -n:

• la fokuso estas klara

If the noun were plural, the adjective would also be plural:

• la fokusoj estas klaraj

If there were accusative, both would match where appropriate, but not in this sentence.

Aŭ ne means or not.

So:

• ĉu la fokuso estas klara = whether the focus is clear
• ĉu la fokuso estas klara aŭ ne = whether the focus is clear or not

The version with aŭ ne is a little more explicit. It clearly states both possibilities. In many contexts, it is optional, but it often sounds natural when someone is checking or verifying something.

This word order is the most straightforward and natural one.

• Ni kontrolas = main clause first
• ĉu la fokuso estas klara aŭ ne = indirect question after it

Esperanto word order is somewhat flexible, but learners should usually keep this standard order unless they have a reason to change it. The given sentence is clear and idiomatic.

• ĉ is pronounced like ch in church
• u is pronounced like oo in food
• so ĉu sounds roughly like choo

For aŭ:

• aŭ is a diphthong, roughly like ow in cow

So:

• ĉu ≈ choo
• aŭ ≈ ow

These are very common sounds and forms in Esperanto, so they are worth learning early.