The fundamental phenomena in the grammar of the modern Spanish language

The article deals with the basic phenomena in the grammar system of the Spanish language. There are considered the changes in the formation of the gender and number among the most prevalent ones. There are emphasized the feminitives, “the loss of demonstrativeness” of the demonstrative pronoun ‘ese’, the change of the form of the imperative mood of the reflexive verbs in the second person of the plural number and the nonagreement by the number of the pronouns of the indirect object during the reduplication.