This might help you http://www.englisch-hilfen.de/en/grammar/present_perfect_progressive_diagram.htm

……………………………….. Positive form : She has learned French. Negative form : She has not learned French. Question : Has she learned French ? …………………………………………………………………………….. Other Examples : I have worked hard She has learned English He has been to India Andy and John have decided to do Judo Susan has done her homework That castle has been visited by many tourists. ( Passive ) I have seen that movie twenty times. I think I have met him once before. There have been many earthquakes in California. Have you read the book yet? Nobody has ever climbed that mountain. A: Has there ever been a war in the United States? B: Yes, there has been a war in the United States. ............................................ Present Perfect Quiz: http://www.englishclub.com/grammar/verb-tenses_present-perfect_quiz.htm http://www.usingenglish.com/quizzes/290.html http://www.english-zone.com/verbs/prsperf4.html ……………………………………………………………………………………………………………

Perfect Tense …………………………………….. Present Perfect Form : (I- We – They – You ) >> Have + past participle // (She – He - It ) >> Has + past participle Example : You have seen that movie many times. / You( have) ( seen ) that movie many times. ............................................ When we use it : 1- he present perfect is used when the time period has not finished: I have seen three movies this week. (This week has not finished yet.) 2- The present perfect is often used when the time is not mentioned: Gerry has failed his exam again 3- The present perfect is often used when the time is recent: Sara has just arrived in Victoria 4- The present perfect is often used with for and since Greg has lived here for 20 years. Greg has lived here since 1978

Present Perfect tense We use "have or has" (present tense) with the past participle (past tense) of the second (main) verb to form the present perfect tense. e.g., We have known for years that smoking causes lung cancer. e.g., I have travelled to China twice in my life. e.g., I have asked a good quesiton. We use this tense to talk about things in the past which continue to be true. e.g., She has lost her keys. This means that her keys are still lost, or remain lost. If you use the simple past tense and say that "She lost her keys." it means that she lost the keys in the past, but may have found them again. If you tell someone "she lost her keys', they are likely to ask 'Has she found them yet?'. But if something (an action or event) started in the past and has continued up to this time we can say: e.g., We have studied English for many years (and are still studying).