Foreign language dictionaries give meanings of verbs and prepositions, but they do not tell the reader how to use them very well. That is what this dictionary does. It furnishes the user three items: (1) most of the syntactical constructions that a verb or a preposition allows, (2) sample sentences both in Spanish and English of each verb's possible usages, and (3) each verb's conjugations, so that those wanting to know how to conjugate a verb do not have to go to another source to look up its conjugations. (It should be noted that the definition of a preposition is expanded here to include many words that traditionally have been called "adverbs.") It can be a very useful tool for students learning Spanish to help them put together sentences. It can also be very helpful for Spanish teachers and linguists to learn of a very creative way to explain syntax.