why can you leave out the subject pronoun in spanish
Pro-drop language A pro-drop language (from "pronoun-dropping") is a language in which certain classes of pronouns may be omitted when they are pragmatically or grammatically inferable (the precise conditions vary from language to language, and can be quite intricate). The phenomenon of "pronoun-dropping" is also commonly referred to as zero or null anaphora.[1] In the case of pro-drop languages, null anaphora refers to the fact that that the null position does have referential properties, meaning it is not a null dummy pronoun. Pro-drop is only licensed in languages that have a positive setting of the pro-drop parameter, which allows the null element to be identified by its governor.[2] In pro-drop languages with a highly inflected verbal morphology, the expression of the subject pronoun is considered unnecessary because the verbal inflection indicates the person and number of the subject, thus the referent of the null subject can be inferred from the grammatical inflection on the verb.[3]
Cruz Cruz is a surname of Iberian origin, first found in Castile[citation needed], Spain, but later spread throughout the territories of the former Spanish and Portuguese Empires. In Spanish and Portuguese, the word means "cross", either the Christian cross or the figure of transecting lines or ways. For example, in the Philippines, the adopted Tagalog word is rendered to "krus" in plain usage, but the Spanish spelling survives as a surname.