This document contains information about various English tenses and voice including:
1. It provides examples and explanations of the past future tense, present continuous tense, past perfect tense, and present perfect continuous tense in both active and passive voice.
2. For each tense, it gives the grammatical structure in active and passive forms as well as 15 example sentences for each converted between active and passive.
3. Additional information is provided on the use of passive voice and how to identify and change the subject, verb, and object when converting between active and passive sentences.