It means, "...if someone..."
"Si alguien" translates to "if someone" in English.
"Alguien que no podré olvidar" translated to English means "Someone that I won't be able to forget."
"Alguien hablando por teléfono" means "someone talking on the telephone" in English.
"Si te cojo" in English translates to "If I catch you."
"Si no está en inglés" means "if it is not in English" in English.
"Si te quiero" in English translates to "I love you."
someone
"Alguien" means "someone".
"Alguien que no podré olvidar" translated to English means "Someone that I won't be able to forget."
"Alguien puede decirme" translates to "can someone tell me" or "somebody can tell me" in English.
Somebody that thinks about himself.
'si je' means "if I" in English.
there is no word si in English
Si vieras = "If you saw..."
if
tengo resaca alguien me ayuda = I have a redraft someone help me
si alguien sabía que le diría.
"Si te cojo" in English translates to "If I catch you."