La música clásica forma parte de mi vida.

In Spanish, it is very common to use the definite article with general nouns, especially when talking about things in a broad sense.

So La música clásica means classical music as a category or type of music, not just one specific piece.

English often drops the article in this kind of sentence, but Spanish usually keeps it:

• La música me gusta. = I like music.
• El café es popular. = Coffee is popular.

So La música clásica sounds natural and correct.

Formar parte de is a very common expression that means to be part of or to form part of.

It works like a fixed phrase:

• forma = forms
• parte = part
• de = of

Together:

• forma parte de mi vida = is part of my life

Even though the verb is formar, you should learn formar parte de as one chunk, because that is how native speakers commonly express this idea.

Because the subject is La música clásica, and that whole phrase is singular.

The main noun is música, which is singular, so the verb must also be singular:

• La música clásica forma...

If the subject were plural, the verb would change:

• Las artes forman parte de mi vida.

So the verb agrees with música, not with clásica and not with vida.

In Spanish, most descriptive adjectives usually come after the noun.

So:

• música clásica = classical music
• casa grande = big house
• libro interesante = interesting book

Putting the adjective before the noun is sometimes possible in Spanish, but it often changes the tone, emphasis, or style. In this case, música clásica is the standard, normal order.

Because clásica is agreeing with música, which is a feminine singular noun.

In Spanish, adjectives usually agree in gender and number with the noun they describe:

• música clásica — feminine singular
• libro clásico — masculine singular
• obras clásicas — feminine plural
• libros clásicos — masculine plural

Since música is feminine singular, the adjective must be clásica.

The accent marks show where the stress goes in pronunciation:

• mú-si-ca
• clá-si-ca

Without the written accent, Spanish pronunciation rules would stress the wrong syllable.

These accents are not optional; they are part of the correct spelling.

Because the expression is formar parte de + noun/pronoun.

So you say:

• formar parte de mi vida
• formar parte del grupo
• formar parte de la familia

The preposition de is required by this expression. You cannot normally replace it with en or another preposition here.

Spanish normally uses the short possessive adjective before the noun:

• mi vida = my life
• tu casa = your house
• su trabajo = his/her/your work

The longer possessive forms like mío/mía usually come after the noun and are more emphatic or contrastive:

• una amiga mía = a friend of mine
• la vida mía is possible in very special poetic or emotional contexts, but it is not the normal everyday choice here.

So mi vida is the standard form.

Yes, es parte de mi vida is understandable and natural in many situations.

However, forma parte de mi vida sounds a bit more idiomatic and slightly more formal or polished. It is a very common expression in Spanish.

Compare:

• La música clásica es parte de mi vida.
• La música clásica forma parte de mi vida.

Both are correct, but the second one is especially common as a set phrase.

It can be used for many kinds of things: abstract ideas, people, groups, jobs, objects, traditions, and more.

Examples:

• Ella forma parte del equipo. = She is part of the team.
• Eso forma parte del problema. = That is part of the problem.
• La lectura forma parte de mi rutina. = Reading is part of my routine.

So in your sentence, using it with La música clásica is completely normal.

A clear, broad pronunciation would be roughly:

la MÚ-si-ka CLÁ-si-ka FOR-ma PAR-te de mi BÍ-da

A few useful notes:

• v in vida is usually pronounced very similarly to b in Spanish.
• The de is usually light and quick.
• The stress falls on mú, clá, for, par, and vi.

If you want a rough English-style approximation: lah MOO-see-kah KLAH-see-kah FOR-mah PAR-teh deh mee BEE-dah

You can understand it word for word as forms part of my life, but that is not the most natural everyday English translation.

A more natural English rendering is:

• Classical music is part of my life.

This is a good example of why literal translation can help you understand structure, but not always produce the most natural sentence in English.