Many stories once told me that i couldn't give up my dream that had existed in my heart deeply, but i was still doing useless things for not having self-control before i became an adult.
其中用到了壹般過去時：many stories once told me； i became an adult。
過去完成時：my dream that had existed 。i became an adult。
過去正在進行時：i was still doing useless things for not having self-contol。
翻譯：許多故事告訴我不能放棄早已深深的存在於我心裏的夢想，但是在我成為成年人之前，仍然因為沒有很好的自控力壹直做壹些無意義的事情。
希望對妳有幫助，望采納。