Post la matenmanĝo mi malplenigas la glason kaj metas ĝin en la kuirejon.

Because Esperanto often uses la for a specific, understood thing or event. Here, la matenmanĝo means the particular breakfast being talked about, not breakfast in general.

English often drops the article with meals, but Esperanto does not always do the same. So:

• post la matenmanĝo = after the breakfast / after that breakfast
• post matenmanĝo = after breakfast, more general

Both can be possible, but la makes it sound more definite.

Because post is a preposition, and nouns after prepositions normally do not take the accusative -n.

So in post la matenmanĝo, the word matenmanĝo is simply the noun governed by post.

Compare:

• mi malplenigas la glason → la glason has -n because it is a direct object
• post la matenmanĝo → no -n, because it follows a preposition

The main exception learners notice is when -n is added after a preposition to show direction, as in en la kuirejon later in the sentence.

Matenmanĝo is a compound word:

• mateno = morning
• manĝo = eating, meal

So matenmanĝo literally means morning meal, which is the Esperanto word for breakfast.

This kind of word-building is very common in Esperanto.

Malplenigas is built very logically:

• plena = full
• malplena = empty
• malplenigi = to make empty, to empty
• malplenigas = empties / is emptying

So mi malplenigas la glason literally means I make the glass empty.

This is a very typical Esperanto pattern:

• mal- = opposite
• -ig- = make something become

So malplenigi is a causative verb: you cause something to be empty.

Because la glason is the direct object of malplenigas.

In Esperanto, the direct object usually takes the accusative ending -n.

So:

• mi malplenigas la glason = I empty the glass

The glass is the thing receiving the action, so it gets -n.

Because ĝin is the accusative form of ĝi.

• ĝi = it
• ĝin = it, as a direct object

In the sentence, ĝin refers back to la glason. Since it is the object of metas, it needs -n:

• mi metas ĝin = I put it

So this is exactly parallel to:

• la glaso → subject form
• la glason → object form
• ĝi → subject form
• ĝin → object form

Because the same subject can apply to both verbs.

So:

• mi malplenigas la glason kaj metas ĝin en la kuirejon

means:

• I empty the glass and put it in the kitchen

Esperanto, like English, does not need to repeat the subject when it is the same for both actions. You could repeat mi, but it would usually be unnecessary:

• mi malplenigas la glason kaj mi metas ĝin en la kuirejon

That is grammatical, but less natural unless you want extra emphasis.

Because en plus -n shows movement into a place.

So:

• en la kuirejo = in the kitchen
• en la kuirejon = into the kitchen

In this sentence, the glass is being moved, so Esperanto uses the directional -n:

• metas ĝin en la kuirejon = puts it into the kitchen

This is one of the most important uses of the accusative in Esperanto besides direct objects.

Kuirejo is also built from smaller parts:

• kuiri = to cook
• -ej- = place used for something
• -o = noun ending

So kuirejo literally means a place for cooking, which is kitchen.

In the sentence, you see kuirejon, which is:

• kuirejo
  • -n

That -n is there because of direction: into the kitchen.

The ending -as is the present tense in Esperanto.

But Esperanto present tense is used a bit broadly. It can describe:

• something happening now
• a habitual action
• a general routine
• sometimes a vivid narrative style

In this sentence, it most naturally sounds like a routine or usual action:

• After breakfast, I empty the glass and put it in the kitchen.

If you wanted a past event, you would use -is:

• mi malplenigis la glason kaj metis ĝin en la kuirejon

If you wanted a future event, you would use -os.

Ĝ is pronounced like the English j in jam.

So:

• ĝin sounds roughly like jeen
• matenmanĝo ends with a j-sound before the final -o

A rough pronunciation of matenmanĝo is:

• ma-ten-MAN-jo

with the stress on the second-to-last syllable, MAN.

This letter is different from:

• g = hard g, as in go
• ĵ = the sound of s in measure