Here are the corrected sentences with the appropriate verb forms:
(1) Over the past 25 years, many people have called Oprah Winfrey the most powerful woman in America.
(2) Since her television program, The Oprah Winfrey Show, first aired in 1984, she has earned the respect of both men and women, and she has advocated important causes from reading to education to women's rights.
(3) For decades, Winfrey has worked very hard to achieve the success she enjoys today.
(4) She grew up in difficult circumstances and had to overcome many obstacles in her rise to fame.
(5) Winfrey was born on January 29, 1954, in Kosciusko, Mississippi.
(6) Her grandmother raised her until she was 6 years old, when her mother moved with her to Milwaukee.
(7) Oprah suffered abuse at home and ran away.
(8) She then went to live with her father in Nashville.
(9) At the age of 19, Winfrey began her career in the media industry as a radio reporter in Nashville, and two years later, she became a news reporter and anchor for the local television station.
(10) In 1984, when she was 30 years old, Winfrey moved to Chicago and took over a failing local talk show.
(11) Winfrey's newly popular program was renamed, and The Oprah Winfrey Show was born.
(12) Since those early years, she expanded her projects to create a media empire that includes her own production studio (the first ever owned by an African American woman), a magazine, a cable network, and countless charitable causes that she has established with her fortune.
(13) Oprah's story suggests that hard work really does pay off.