La directora no és aquí ara, però demà ens ensenyarà l'escenari abans que s'obri el teló.

Yes. In Catalan, it is very normal to use the definite article with a specific person’s role or title when that title is being used as a noun.

So la directora means the director or the headmistress/head director, depending on context.

A native English speaker may want to drop the article, but in Catalan that would usually sound incomplete here.

• La directora = the director
• Directora by itself would sound more like a label, a form of address, or a dictionary entry

Also, directora is the feminine form of director.

This is a very common question.

In standard Catalan, ser is often used for simple location, especially with words like aquí, allà, allí, etc. So:

• La directora no és aquí = The director is not here

To an English speaker, or to someone who also knows Spanish, estar may feel more expected, but Catalan often prefers ser in this kind of sentence.

Very roughly:

• ser can simply locate someone or something
• estar is more likely when there is an idea of remaining, staying, or being in a certain state

So in this sentence, és is the natural standard choice.

They mean different kinds of things:

• aquí = here → place
• ara = now → time

So:

• no és aquí ara = is not here now

This combination is very straightforward:

• aquí tells you where
• ara tells you when

Catalan word order is fairly flexible, but the order in the sentence sounds natural and neutral:

• La directora no és aquí ara

It could be changed for emphasis, for example:

• Ara la directora no és aquí = Right now, the director is not here
• La directora ara no és aquí = The director is not here now

So the original order is not the only possible one, but it is a normal, unmarked way to say it.

Ensenyarà is the future tense of ensenyar.

The infinitive is:

• ensenyar = to show, to teach

The form ensenyarà means:

• he/she will show
• he/she will teach

In this sentence, the subject is la directora, so:

• ensenyarà = she will show

It is built from the infinitive plus a future ending:

• ensenyar
  • -à → ensenyarà

Ens means us.

In this sentence:

• demà ens ensenyarà l'escenari
• literally: tomorrow she will show us the stage

Catalan object pronouns usually come before a conjugated verb:

• ens ensenyarà = she will show us

This is different from English, where us usually comes after the verb:

• she will show us

So ens is the person receiving the action.

Because Catalan often shortens the article before a vowel.

The masculine singular article is normally:

• el = the

But before a word beginning with a vowel, it becomes:

• l'

So:

• el + escenari → l'escenari

This is called elision. It is very common in Catalan:

• l'escola
• l'amic
• l'escenari

Yes. Ensenyar can mean both.

Common uses:

• ensenyar una lliçó = to teach a lesson
• ensenyar una foto = to show a photo

In this sentence, the object is l'escenari = the stage, so the meaning is clearly show, not teach.

So:

• ens ensenyarà l'escenari = she will show us the stage

Because abans que normally takes the subjunctive when talking about something that has not happened yet.

Here the action is still in the future:

• first, she will show us the stage
• then, the curtain will open

So Catalan uses:

• abans que s'obri el teló

not:

• abans que s'obre el teló

The form s'obri is the present subjunctive.

This is a very important pattern:

• abans que + subjunctive

The s' is the pronoun es, shortened before a vowel.

So:

• es obri → s'obri

Here it is part of a pronominal use meaning to open in the sense of to open by itself / to become open.

So:

• s'obri el teló = the curtain opens

You can think of it as similar to expressions where something happens to itself rather than someone explicitly doing it.

Obri is the present subjunctive form of obrir for ell/ella or for something singular like el teló.

The infinitive is:

• obrir = to open

Relevant forms:

• s'obre = it opens / it is opening → indicative
• s'obri = that it open / before it opens → subjunctive

Because the sentence uses abans que, Catalan chooses the subjunctive form:

• abans que s'obri el teló

The accents help with stress and sometimes also with vowel quality.

• és: the accent distinguishes it from es and shows it is the verb is
• demà: stress falls on the last syllable
• ensenyarà: stress also falls on the final syllable

So the accents are not optional spelling decoration; they are a real part of the word.

For a learner, the most useful thing is:

• és = is
• demà = tomorrow
• ensenyarà = will show / will teach

and the accents help you pronounce them correctly.