"I have a reservation."

Why una reserva and not un reserva

Difference between tengo and tiene?

Whats difference in un and una

Un=mascukine, una=feminine

Cant we write "Tengo" instead of "yo tengo"??

Haven't come across "reserva" meaning anything else but "reserve" until...well, today (7/15/18)! The RAE's online Diccionario de la lengua española (2017) doesn't include "reservation" as another definition. Nevertheless, a generic Google search confirms that nowadays, "reserva" = "reservación." Wish there was a reference out there that records when a new word or new word definition entered the Spanish language or better still, reports the earliest known texts where said word appeared.

Wonder if this is another example of a trend far more common in French, namely "guillotining," where relatively longer words get their final syllables chopped off to make new ones, e.g. "sympa," "fac," "prof," etc.

When to use tengo and when to use aqúi for here?

Check my answer it's correct but you say it's wrong

It said it was wrong but then said exactly what i said