Il coro memorizza il repertorio.

Because il is the masculine singular definite article, meaning the.

In this sentence:

• il coro = the choir
• il repertorio = the repertoire

Italian uses articles more regularly than English, so seeing the twice is completely normal.

Coro is a noun, and it is masculine singular.

That is why it takes il:

• il coro = the choir

If it were plural, it would become:

• i cori = the choirs

Memorizza is the third-person singular present tense form of the verb memorizzare.

That means it goes with subjects like:

• lui = he
• lei = she
• esso/essa = it
• any singular noun, such as il coro

So Il coro memorizza means the choir memorizes or the choir is memorizing, depending on context.

The infinitive is memorizzare, meaning to memorize.

This is a regular -are verb. Its present tense forms are:

• io memorizzo = I memorize
• tu memorizzi = you memorize
• lui/lei memorizza = he/she memorizes
• noi memorizziamo = we memorize
• voi memorizzate = you all memorize
• loro memorizzano = they memorize

It can mean either one.

The Italian present tense often covers both:

• The choir memorizes the repertoire
• The choir is memorizing the repertoire

Context tells you which English translation sounds more natural.

Because Italian does not need an explicit subject pronoun when the subject is already named.

Here, the subject is il coro, so there is no need to say it.

Italian often drops subject pronouns anyway, because the verb ending already gives information about the person and number. In this sentence, though, the subject is fully stated as il coro.

Repertorio is a noun meaning repertoire.

In this context, it refers to the body of music, songs, or pieces that the choir performs or is learning.

It is also masculine singular, so it takes il:

• il repertorio

The normal, neutral word order is:

• subject + verb + object
• Il coro memorizza il repertorio.

Italian word order is often more flexible than English, but this version is the most straightforward and natural in ordinary usage.

Other orders may be possible for emphasis, but for a learner, this sentence is the standard pattern to remember.

Because coro is a collective noun.

Even though a choir contains many singers, the word itself is grammatically singular, so it takes a singular verb:

• Il coro memorizza...

This works like English the team, the group, or the family when treated as singular.

A simple pronunciation guide is:

eel KOH-ro meh-moh-REET-tsa eel reh-per-TOH-ryoh

A few useful notes:

• c before o in coro sounds like a hard k
• zz in memorizza sounds like ts or tts
• the stress is:
  • CÓ-ro
  • memoRÍZza
  • repertoRIO

Yes, in many contexts that would also be natural.

There is a slight difference:

• memorizzare = to memorize
• imparare a memoria = to learn by heart

They are very close in meaning, but imparare a memoria often feels a bit more idiomatic in everyday speech when talking about learning something by heart.

So both can work, depending on style and context.

If both the subject and object become plural, you get:

• I cori memorizzano i repertori

Changes:

• il coro → i cori
• memorizza → memorizzano
• il repertorio → i repertori

However, whether repertori sounds natural depends on the context. Often people may still talk about one specific repertoire, even with multiple choirs.