Ni komentas la sontrakon post la dramo.

The ending -as marks the present tense in Esperanto.

So komentas means something like comment, comments, or are commenting, depending on context. Esperanto verbs do not change form for different subjects:

• mi komentas = I comment / I am commenting
• ni komentas = we comment / we are commenting
• ili komentas = they comment / they are commenting

Unlike English, there is no special form like comments for he/she/it.

It can mean either one.

Esperanto’s present tense with -as covers both:

• a general present: we comment
• an ongoing present: we are commenting

Usually the surrounding context tells you which English wording fits best.

Because in Esperanto, komenti is commonly used as a directly transitive verb.

So instead of saying comment on the soundtrack, Esperanto can simply say:

komenti la sontrakon

That means the thing being commented on is treated as the direct object, which is why it gets -n.

This is a very common difference from English: Esperanto often uses a direct object where English prefers a verb + preposition.

The -n is the accusative ending, which usually marks the direct object of the verb.

Here:

• ni = the subject, the people doing the action
• komentas = the action
• la sontrakon = the thing being commented on

So sontrakon gets -n because it is the direct object.

Its base form is sontrako. The sentence uses sontrakon because of its role in the sentence.

Because la is invariable in Esperanto.

It always stays la, whether the noun is:

• singular
• plural
• accusative
• not accusative

So Esperanto says:

• la sontrako
• la sontrakon
• la sontrakoj
• la sontrakajn kantojn

The article stays la every time. The endings go on the noun, and on adjectives if there are any.

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

So:

• post la dramo = after the play/drama

The preposition post already shows the relationship, so no extra -n is needed here.

A learner often notices this contrast:

• la sontrakon gets -n because it is the direct object
• la dramo does not get -n because it follows the preposition post

Here post means after in a time sense: after the drama/play.

The same word can also mean behind in a place sense in other contexts. So post can be either:

• after = time
• behind = location

In this sentence, because la dramo is an event, the meaning is clearly temporal: after the play.

Yes. Esperanto word order is fairly flexible, because endings help show what each word is doing.

This sentence uses a very neutral order:

Ni komentas la sontrakon post la dramo.

But you could also say:

Post la dramo ni komentas la sontrakon.

That puts more emphasis on after the drama.

Because sontrakon has -n, it is still clearly the object even if the order moves around. Even so, the original order is the most straightforward and natural for a beginner.

It is a compound word:

• son- = sound
• trak- = track
• -o = noun ending

So sontrako literally means sound-track.

This is very typical Esperanto word-building. The final part takes the grammatical ending, while the earlier part appears as a root.

In this sentence, dramo can naturally refer to a dramatic work or play, depending on context.

A learner may expect it to mean only the genre drama, but in actual use it can refer to the work itself. So if the translation shown to you says play, that is perfectly reasonable here.

As always, context decides the most natural English choice.