There are several scenarios in which this book is needed: 1. Many verb conjugations have another meaning as some other part of speech, such as , , and , and are defined in most dictionaries and translation web sites as such. The reader can look up and in this book and find these entries: (Ud.) imperative; yo/Ud. pres. subj. yo pres. ind. 2. A word may be a conjugation of a common verb and also of an uncommon one, for example . The reader might recognize the word as a conjugation of , and as meaning "she attends." But the word is also a conjugation of the verb , to grasp, and means "you grasped." The reader might not even know of the verb . The listing for gives all its uses in both verbs: (1) tú pret. (2) Ud. pres. ind.; (tú) imperative 3. A reader encounters a word that is evidently a conjugation, but does not know which one(s), for example . This could be a conjugation of or , but which ones? The reader does not know has five meanings. Trying to find them using other means is difficult and time-consuming, and will probably miss one or more of the meanings. In this book, all the meanings are in one place, under . (Ud.) imperative; yo/Ud. pres. subj. (2) or this pp. (2) If the word you are looking for is not in your Spanish-English dictionary, look in this book. It has 100,000 more words.