La bidella apre l’aula prima delle otto ogni mattina.

In Italian, a singular noun used as the subject of a normal sentence usually takes an article. So la bidella is the natural way to say the school janitor/caretaker here.

English often leaves articles out in places where Italian keeps them, but Italian generally prefers the article with nouns like this.

Bidella is the feminine form, while bidello is the masculine form. The article la also shows that the person is grammatically feminine.

So:

• il bidello = masculine
• la bidella = feminine

Because the article la becomes l’ before a singular feminine noun that begins with a vowel.

So:

• la + aula becomes l’aula

This is called elision. It makes pronunciation smoother.

Apre is the third-person singular present tense of aprire (to open). It matches the singular subject la bidella.

So the pattern is:

• io apro
• tu apri
• lui/lei apre

Since la bidella is she, apre is the correct form.

In Italian, just like in English, the present tense is often used for habitual or repeated actions.

So apre here does not mean only is opening right now. It can also mean opens as part of a routine. The phrase ogni mattina makes that habitual meaning clear.

Because when Italians tell the time, they normally use the article: le otto = eight o’clock.

After prima di, that article is still there:

• prima di + le otto
• di + le becomes delle
• so: prima delle otto

That is why delle is needed.

Delle is a contraction of di + le.

In this sentence, the full underlying idea is:

• prima di le otto

But Italian combines di + le into delle, giving:

• prima delle otto

This kind of contraction is very common in Italian.

In Italian, clock times after one o’clock are normally expressed with the feminine plural article le:

• l’una = one o’clock
• le due = two o’clock
• le otto = eight o’clock

So in prima delle otto, the -le part comes from le otto.

Because ogni (every/each) normally goes directly before a singular noun and does not take an article.

So:

• ogni mattina
• ogni giorno
• ogni settimana

You would not normally say ogni la mattina.

Yes. Ogni mattina and tutte le mattine can both mean every morning.

There is a small structural difference:

• ogni + singular noun
• tutte le + plural noun

Both are common and natural.

Italian word order is flexible, but this order is very natural: subject + verb + object + time expressions

So:

• La bidella = subject
• apre = verb
• l’aula = object
• prima delle otto ogni mattina = time information

You could also say: Ogni mattina la bidella apre l’aula prima delle otto.

That is also correct; it just shifts the emphasis slightly.

Aula usually refers to the physical room: classroom, lecture room, or school room.

Classe often means the class as a group of students, though in some contexts it can also refer to the classroom.

In this sentence, aula is the better choice because the idea is clearly the room being opened.

Yes, it is widely understood and commonly used in everyday speech. However, in more official or bureaucratic language, you may also see terms like collaboratrice scolastica.

So:

• bidella = common everyday word
• collaboratrice scolastica = more formal/official term

For learners, bidella is a very useful word to know.