With an accent over the first 'i', and a comma after, it means:
'Yes, you are//he/it is mine'
Without the accent and comma, it means:
'If you are//he/it is mine'.
if you have msn, mine is...
"Si es, es" is Spanish for "If it is, it is". If you just mean "si es", that means "if it is". If you mean "Sí es" (with an accent on "Sí"), it means "Yes, it is".
It means "[it] is mine"
Is mine and that
"El gusto es mío" is a Spanish phrase that translates to "The pleasure is mine." It is a polite way of reciprocating gratitude or acknowledging a pleasant interaction.
This telephone is mine.
oh my God!!
the world is mine
The mine is yours.
si es porque means if it's because
"Si hoy es jueves, mañana es..." means "If today is Thursday, tomorrow is..."
el gusto es mio = the pleasure is mine