The purpose of this work is to provide the student with English, as explained by its title, a useful summary of the grammar English. No attempt has been thoroughly addressed and include all the details of grammar or the English language in general. It is simply a compendium of the essentials in the grammatical structure of English for Spanish-speaking students, whatever their level of expertise. It differs from most texts and brief exposure concise, in Spanish, in all material on English grammar. Efforts have been made to relate each new look with their equivalents language and terminology familiar to the student, trying use the fewest possible grammatical technicalities. here find, in addition to the basic grammatical rules, observations Useful information about similarities and contrasts between the two languages and equivalences in Spanish of all examples, phrases and words used in text. The student will find very useful table of contents, and the Alphabetical Index. It must be stressed again that this text is not intended as a course full English, but additional tool for consultation and analysis, together