In Present perfect^x, Speaking English^x

Please can you post difference between past perfect tense and present perfect tense, parts of speech, present and past words to me ,I want to improve my speaking English, also help me with relevant things.I will be greatful if you send it in to me e-mail

Please can you post difference between past perfect tense and present perfect tense, parts of speech, present and past words to me ,I want to improve my speaking English, also help me with relevant things.I will be greatful if you send it in to me e-mail

Thank you. So "I'm listening to Beatles for 2 hours already" is wrong and can not be used, even if action is going on at the moment? I mean, somebody naturaly speaking english would never say like that?

As a teacher, my students have difficulty with tenses which don't exist in their language - for example, present perfect. Learning vocab is always a matter of memorising unfortunately, and jokes and colloquialisms are also very difficult. I sometimes feel like a really bad stand-up comedienne...