This document discusses common mistakes that Spanish students make when learning English, the causes of these mistakes, and exercises to help correct them. It identifies mistakes in areas like grammar, pronunciation, and spelling that are influenced by the structures of the Spanish language. The document analyzes mistakes with verbs, word order, question formation, sounds, and spelling. It provides exercises for students to practice and overcome mistakes in areas like verb agreement, adjective placement, auxiliary use, pronunciation of specific sounds, and reading words as written. The overall goal is to help students recognize mistakes as a natural part of learning, and find ways to avoid them in the future.