2) It's nearly twenty years since my father saw his brother
=> my father....hasn't seen his brother for nearly twenty years ......
3) my wait in the queue has lasted forty minutes so far
=> I.......have waited in the queue for forty minutes so far .......
4) i started studying E when i was nine year old
=> I have.....studied E since I was nine year old.........
5) i'm asking you this question for the third time
=> this is...the third time I have asked you this question....
6) after that she never got in touch with him
=> that was the....last time she got in touch with him .....