Mi ĉiam matenmanĝas hejme antaŭ ol mi iras al la oficejo.

In Esperanto, matenmanĝi is a single verb meaning to eat breakfast / to have breakfast.

• mateno = morning
• manĝi = to eat
• together: matenmanĝi = to breakfast

So:

• Mi matenmanĝas = I eat breakfast / I have breakfast
• Mi ĉiam matenmanĝas = I always eat breakfast

Esperanto often builds words this way, and it is very common.

The ending -as marks the present tense in Esperanto.

So:

• matenmanĝas = eat / am eating / do eat
• iras = go / am going

Esperanto does not change the verb ending for different persons:

• mi iras = I go
• vi iras = you go
• li iras = he goes
• ili iras = they go

The verb ending stays -as for all persons.

Esperanto does not need a helping verb like English do for ordinary present-tense statements.

English says:

• I eat breakfast
• I do eat breakfast

Esperanto simply uses the main verb:

• Mi matenmanĝas

If you want emphasis, Esperanto usually uses word order or context rather than adding a separate word like English do.

Ĉiam means always.

In this sentence, Mi ĉiam matenmanĝas means I always eat breakfast. Placing ĉiam before the verb is very natural.

Common positions include:

• Mi ĉiam matenmanĝas.
• Mi matenmanĝas ĉiam.
  This is possible, but less neutral in many contexts.

Esperanto word order is fairly flexible, but the most natural order is usually the clearest one.

Hejme means at home.

The ending -e marks an adverb. Here it describes where the action happens.

Compare:

• hejmo = home (a noun)
• hejma = home-related, domestic (an adjective)
• hejme = at home (an adverb)

So:

• Mi matenmanĝas hejme = I eat breakfast at home

English uses a preposition (at home), but Esperanto often uses an adverb instead.

Antaŭ ol means before when it introduces a whole clause with a verb.

Here:

• antaŭ ol mi iras al la oficejo = before I go to the office

Use antaŭ ol before a verb clause:

• Mi manĝas antaŭ ol mi laboras. = I eat before I work.

But antaŭ by itself is often used with a noun or in a more literal spatial/temporal sense:

• antaŭ la domo = in front of the house
• antaŭ la kunveno = before the meeting

So in this sentence, because a full clause follows (mi iras...), antaŭ ol is the correct choice.

Esperanto uses the ordinary present tense -as very broadly, often where English may choose different forms depending on style and context.

So:

• antaŭ ol mi iras al la oficejo literally has present tense
• but in natural English it may be translated as before I go to the office

Esperanto does not need to match English tense choices exactly. The context makes the sequence of events clear.

You could also sometimes see other tense choices in other contexts, but -as here is normal and natural.

Because la oficejo is the object of the preposition al, not a direct object.

• al = to, toward
• al la oficejo = to the office

In Esperanto, prepositions usually govern the basic form without -n.

So:

• Mi iras al la oficejo. = I go to the office.

By contrast, the accusative -n is used for direct objects:

• Mi vidas la oficejon. = I see the office.

That is why it is al la oficejo, not al la oficejon in this sentence.

Oficejo means office.

It is built from:

• ofico = office, duty, position
• -ej- = place used for something
• -o = noun ending

So oficejo is literally something like a place for office work.

The suffix -ej- is very useful in Esperanto. For example:

• lerni = to learn

• lernejo = school (a place for learning)

• kuiri = to cook
• kuirejo = kitchen (a place for cooking)

Yes. La is the definite article, meaning the.

So:

• oficejo = an office / office
• la oficejo = the office

In this sentence, al la oficejo suggests a specific office, such as the office the speaker normally goes to.

Esperanto has only one article:

• la = the

There is no separate word for a/an. If needed, Esperanto simply leaves the noun without an article:

• Mi iras al oficejo would usually sound odd here, because normally you mean a specific office.
• Mi iras al la oficejo is the natural phrase for I go to the office.

Yes, Esperanto allows some flexibility in word order, but not every change sounds equally natural.

The original sentence:

• Mi ĉiam matenmanĝas hejme antaŭ ol mi iras al la oficejo.

A few possible variations:

• Ĉiam mi matenmanĝas hejme antaŭ ol mi iras al la oficejo.
• Mi matenmanĝas hejme antaŭ ol mi iras al la oficejo, ĉiam.
  This is possible, but it gives ĉiam a different feel, almost as an afterthought or emphasis.

The original order is the most neutral and natural for ordinary speech.

The letter ĉ is pronounced like ch in church.

So:

• ĉiam sounds roughly like CHEE-am

A few relevant sounds from this sentence:

• ĉ = English ch
• ĝ = like j in jam
  so matenmanĝas contains that sound in -ĝ-
• j = like English y
• ŭ = a short w-like sound, though it does not appear in this sentence as a separate letter

Esperanto spelling is very regular, so once you learn the letters, pronunciation becomes much easier than in English.

Yes, it is natural and correct.

It has:

• a normal subject: Mi
• a time-frequency adverb: ĉiam
• a main verb: matenmanĝas
• a place adverb: hejme
• a time clause: antaŭ ol mi iras al la oficejo

It sounds like clear, standard Esperanto. A learner could use it as a good model for talking about daily routine.