Unue mi ne komprenis la demandon, sed poste mi trovis la respondon.

The -n marks the direct object in Esperanto. That means these are the things being understood or found.

• mi komprenis la demandon = I understood the question
• mi trovis la respondon = I found the answer

In Esperanto, the direct object usually gets -n, even when English does not show any special ending.

The ending -is is the Esperanto ending for the past tense.

• komprenas = understand / am understanding
• komprenis = understood
• trovas = find / am finding
• trovis = found

So this sentence is talking about something that happened in the past.

They are time-related adverbs showing the order of events.

• unue = first, at first
• poste = afterwards, later, then

So the sentence is structured like this:

• Unue → first situation
• sed poste → contrasting later situation

It helps show a change over time: first there was no understanding, later there was a solution.

In Esperanto, ne usually goes directly before the word or idea it negates. Here it negates the verb:

• mi ne komprenis = I did not understand

That is the normal and most natural position. English speakers can think of it as working a lot like not.

La is the definite article, meaning the. Esperanto has only one article: la.

So:

• la demandon = the question
• la respondon = the answer

It is used here because the sentence refers to a specific question and a specific answer, not just any question or answer.

Sed means but.

It connects two parts of the sentence that contrast with each other:

• first: I did not understand the question
• later: I found the answer

So sed shows a contrast or change in the situation.

It can suggest either, depending on context.

Literally, trovi means to find. But in many contexts, finding an answer can also mean discovering or figuring out the answer.

So in this sentence, mi trovis la respondon could naturally mean:

• I found the answer
• I figured out the answer

Both fit well.

Yes. Esperanto word order is more flexible than English because endings like -n show grammatical roles clearly.

For example, these are possible:

• Unue mi ne komprenis la demandon, sed poste mi trovis la respondon.
• Mi unue ne komprenis la demandon, sed poste mi trovis la respondon.
• Poste mi trovis la respondon, sed unue mi ne komprenis la demandon.

However, the original version is very natural and clear. For learners, the standard order is usually easiest.

Because la demandon already is the object. Esperanto does not need an extra pronoun there.

• mi komprenis la demandon = I understood the question

You would only use a pronoun like ĝin if you were replacing the noun:

• Mi komprenis ĝin. = I understood it.

The same applies to la respondon / ĝin.

In this sentence, it is closer to at first.

Unue can sometimes mean firstly, especially in a list or sequence of points. But here it introduces the earlier stage of a situation:

• Unue mi ne komprenis... = At first I didn’t understand...

Because the sentence later says poste, the time-sequence meaning is especially clear.

They are nouns with normal Esperanto endings:

• demand-o-n

  • demand- = question / asking
  • -o = noun ending
  • -n = direct object

• respond-o-n

  • respond- = answer / response
  • -o = noun ending
  • -n = direct object

A very useful pattern in Esperanto is:

• -o = noun
• -a = adjective
• -e = adverb
• -i = infinitive verb

So once you know the root, the ending tells you the word’s role.

Because sed joins two full clauses:

• mi ne komprenis la demandon
• mi trovis la respondon

In Esperanto, as in English, a comma is commonly used before sed when it links two independent clauses. It helps make the structure clearer.