La nova trupo laboras en la teatro.

In Esperanto, adjectives end in -a. So nova means new.

This is true no matter where the adjective appears:

• la nova trupo = the new troupe
• la trupo estas nova = the troupe is new

Adjectives also match the noun in number and case, but here everything is singular and there is no accusative, so the basic form nova is used.

In Esperanto, nouns normally end in -o. So trupo is a noun.

Some very common endings are:

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

So in this sentence:

• trupo is a noun
• nova is an adjective
• laboras is a present-tense verb

Yes. La is the definite article, like English the.

So:

• la trupo = the troupe
• la teatro = the theater

A useful difference from English is that Esperanto has only one definite article: la. It does not change for gender, number, or case.

Because Esperanto verbs always show tense with a fixed ending. -as marks the present tense.

So:

• labori = to work
• laboras = works / is working / work / are working
• laboris = worked
• laboros = will work

In Esperanto, the verb form does not change depending on the subject:

• mi laboras = I work
• li laboras = he works
• ili laboras = they work

So La nova trupo laboras simply means The new troupe works / is working.

Because Esperanto often uses the simple present -as where English might use either the simple present or the present progressive.

So laboras can mean:

• works
• is working
• are working

The exact English translation depends on context. Esperanto does not always make that distinction unless there is a special reason to do so.

En is a preposition meaning in or inside.

So:

• en la teatro = in the theater

This phrase tells you where the action happens. It is a prepositional phrase, and after en you normally use the basic noun form, unless motion into something is being emphasized with -n.

Here there is no motion, only location, so:

• en la teatro = in the theater

The -n ending usually marks the direct object, and it can also show motion toward something in some expressions.

In this sentence:

• La nova trupo is the subject
• laboras does not take a direct object here
• en la teatro shows location, not motion

So no word needs -n.

Compare:

• La nova trupo laboras en la teatro. = The new troupe works in the theater.
• La nova trupo eniras la teatron. = The new troupe enters the theater.

In the second sentence, teatron has -n because it shows motion into the theater.

Esperanto word order is fairly flexible, but the normal order here is:

• La nova trupo = subject
• laboras = verb
• en la teatro = place phrase

So the sentence follows a common pattern: subject + verb + place.

You could rearrange it for emphasis:

• En la teatro laboras la nova trupo.

That is still understandable, but the original sentence is the most neutral and beginner-friendly order.

Yes, adjectives can come either before or after the noun, but putting the adjective before the noun is very common.

So both are possible:

• la nova trupo
• la trupo nova

The first is much more natural in most ordinary contexts. A learner should usually place adjectives before the noun unless there is a special stylistic reason not to.

Trupo means a troupe, especially a group of performers such as actors, dancers, or similar artists.

Because the sentence also mentions the theater, a learner would naturally understand trupo here as a performing group working in a theater.

So even if the translation has already been given, the surrounding words help confirm the kind of group being talked about.