Here is an English grammar lesson about the form of the present perfect tense. In this lesson, you will learn the affirmative form (positive), question form and negative form of the present perfect tense. I also explain the contracted forms for the affirmative and negative. The present perfect is formed by a combination of the auxiliary verb "have" in the present followed by the past participle of the main verb. Example: "I have cleaned." The past participle of regular verbs is formed by adding "ed" to the base form. I also give you the spelling rules of forming the past participle of other regular verbs. The past participle of irregular verbs have no rules at all and you must simply learn them by heart when you learn a new verb. Some examples are be - been, find - found, do - done, go - gone. The position of adverbs whne using the present perfect is very important. Generally we place the adverb between the auxiliary verb "have" and the past participle of the main verb. Example "He has JUST left the office." At the end of this English grammar lesson, there are some exercises to test your understanding. If you have any questions, please ask me in the comments section below the video lesson and I will answer. The accent in the video is a British English accent. Part 2 of this video series (use and meaning) can be found here: https://www.youtube.com/watch?v=aVo83K-GwHc More grammar lessons:    • learn English grammar   Listening exercises:    • English listening practice   Vocabulary videos:    • learn English vocabulary   Private English lessons & speaking practice: http://goo.gl/OP3C5h Andrew, Crown Academy of English http://www.crownacademyenglish.com/ null https://twitter.com/Crown_English Photo credits: "Handsome Sitting Male With Books" Image courtesy of imagerymajestic | FreeDigitalPhotos.net "Front View Of Boy Sitting On Skate And Pointing" Image courtesy of imagerymajestic | FreeDigitalPhotos.net "Great Work Done, Keep Up" Image courtesy of stockimages | FreeDigitalPhotos.net "Dustpan And Brush On White" Image courtesy of artur84 | FreeDigitalPhotos.net "A Dirty Frying Pan" Image courtesy of Mister GC | FreeDigitalPhotos.net "Sister And Brother Arguing" Image courtesy of artur84 | FreeDigitalPhotos.net "Side Pose Of Man Looking Through Binocular" Image courtesy of imagerymajestic | FreeDigitalPhotos.net "Student And Bunch Of Books" Image courtesy of marin | FreeDigitalPhotos.net "Excited Male With Thumbs Up" Image courtesy of imagerymajestic | FreeDigitalPhotos.net