Translated into English, cual es tu telefono means what is your phone number?
Spanish grammar is the grammar of the Spanish language (español, castellano), which is a Romance language that originated in north central Spain and is spoken today throughout Spain, some twenty countries in the Americas, and Equatorial Guinea.
Spanish is an inflected language. The verbs are potentially marked for tense, aspect, mood, person, and number (resulting in some fifty conjugated forms per verb). The nouns form a two-gender system and are marked for number. Pronouns can be inflected for person, number, gender (including a residual neuter), and case, although the Spanish pronominal system represents a simplification of the ancestral Latin system.
The Spanish language has a range of pronouns that in some ways work quite differently from English ones. In particular, subject pronouns are often omitted, and object pronouns usually precede the verb.
The table below shows a cumulative list of personal pronouns from Peninsular, Latin American and Ladino Spanish.