This is a awesome slideshow that will teach your students all about the irregular past participles that are a part of the present perfect tense! This slideshow should be used after students are familiar with the regular present perfect and are ready to move on to the irregular past participles. The slideshow begins with a brief review of regular present perfect and then moves on to the 12 irregular participles. The slideshow concludes with a Checking for Understanding section that will make sure your students grasped the material, and allow them to practice without pressure.