il joue de la guitar. Why can't you omit the "de"?

[Prenom.Pierre]

In France, they do like this with all instruments.

It is the charm of a language to learn differences.

Il joue du piano, de la flûte, de l'accordéon, etc.

Why can you in english omit the preposition ?☺

[ngraner42]

In America we say "I am in the hospital" while in Britain they say "I am in hospital". The "the" is not needed.

[Prenom.Pierre]

Remarque intéressante.