If you want to practice only irregular tenses you can click on the checkbox and mark this feature before starting the verb exercises.
Michael, Liverpool, England: 'I use your system to improve my Spanish. We plan to go on vacation in Spain (Costa del Sol) next August. It's a good preparation.'
Instituto Intercultural del Caribe: One of the largest language institutions. Either in the Caribbean-style metropolis Santo Domingo or in small sea town of Sosua since 1994.