Active and passive are voices. Ther's debate about how many tenses there are. some say there are only two- present and past, and that the present and past perfect are just aspects of the present and past tenses. Others regard them perfect forms and the perfect progressive forms as individual tenses. The future tense is also strongly debated - some say that we use the present and past tenses to express the future, while others say that will is the future tense.