Grammar Here you have some links to practice tenses. http://www.englishpage.com/verbpage/presentperfectcontinuous.html http://www.englishpage.com/verbpage/pastperfectcontinuous.html http://www.aulafacil.com/Ingejerc/Lecciones/Ejerc21.htm http://www.englishtenses.com/tenses/past_perfect_continuous