Задать вопросы и ответить на них, по предложениям:
I play badminton every Monday.
You play badminton every Monday.
He/she plays badminton every Monday.
They play badminton every Monday.

Do I play badminton every Monday? - Yes, I do/ No, I don'tDo you play badminton every Monday? - Yes, I do/ No, I don'tDoes He/she play badminton every Monday? Yes, she/he does/ No, she/he doesn'tDo they play badminton every Monday? Yes, they do/ No, they don't