"Thanks very much for your e-mail." - should be "Thank you very much for your email.""At the moment I’m studying really hard, because next week we will have tests." - should be "At the moment, I am studying really hard because we have tests next week.""My lessons start at 8:00." - should be "My lessons start at 8:00 AM.""I’m going home and doing homework." - should be "I go home and do homework.""In the evening I’m going for a walk with my dog." - should be "In the evening, I go for a walk with my dog.""At the weekend i go out with my friends" - should be "On the weekend, I go out with my friends.""That’s all." - no error"Write again soon" - should be "Write to me soon."