Составить вопросительные и отрицательные предложения You understand Maths. She sends messages every day

Do you understand Maths?You do not understand Maths.You do not understand Maths, do you?What subject do you understand?Do you understand Maths or Biology?Does she send messages every day?She does not send messages every day.She does not send messages every day, does she?What does she send every day?Does she send messages or letters every day?