Present Simple: I get up at 7 o'clock everyday. She goes to school on Mondays. He visits his grandparents every weekend. I don't get up at 7 o'clock everyday. She doesn't go to school on Mondays. He doesn't visit his grandparents every weekend. Do you get up at 7 o'clock everyday? Does she go to school on Mondays? Does he visit his grandparents every weekend?
Past Simple: I met my friends yesterday. They came to visit us last week. He bought a T-shirt last year. I didn't meet my friends yesterday. They didn't come to visit us last week. He didn't buy a T-shirt last year.Did you meet your friends yesterday? Did they come to visit you? Did he buy a T-shirt last year?
Future Simple: I will study in the Medical University next year. She will visit my aunt next Sunday. We will go to Moscow next month.I will not study in the Medical University next year. She won't visit my aunt next Sunday. We will not go to Moscow next month. Wiil you study in the Medical University next year? Will she visit her aunt next Sunday? Will we go to Moscow next month?