I am xxx, a student of ABC school (usually present tense). I have been learning English for five years. In the past few years, I have been thinking about what to do in the future. Actually, I thought I would be a worker after I graduated from college. Yesterday, when I was sleeping in class, my teacher woke me up and said,' You should listen to me carefully, or you won't succeed in the future. His words reminded me of my dream of being a teacher. So I decided to study hard from then on. I believe that if I work harder than others, I will become what I want to be (simple future tense).