Present perfet I have been studied the present perfect. According with the videos that I have been watched, you used the present perfect for express experience that start in the past and continuous in the present, and you don´t specific the time that happen. In this post, I have tried to used this grammar for practice, but my first problem is that I don´t know the past participle, that is necessary for complete the sentences in present perfect. If somebody can give me a suggestion or advice for practice the present perfect or to learn past participle I will be grateful