Rudy was the best table tennis player in my school. However, unfortunately he had to move out of town. He often completed to various competitions in Indonesia. While he was still at my school, he often taught me some good techniques in playing table tennis. He treated me like his own brother. Therefore, he would share his knowledge to me. I'm very grateful to him. Because of him, now I can play table tennis better than before.what tenses used in the text?why?

tolong yaa di jawab, besok mau dikumpulinn​