Sunday and Monday.
Kayo (She) never studies on Sundays or Mondays.
What does Kayo do on Mondays?
She always plays ( practices) the piano.
Weekdays. I ~
I never play tennis on weekdays.
Thursday
Kayo (She) never plays (practices) the piano on Thursdays.
Tuesday & Wednesday
Charles (He) doesn't usually play video games on Tuesdays or Wednesdays.
Saturday and Sunday together is called?
weekend(s)
Tuesday and Friday
She doesn't usually play / practice the piano on Tuesdays or Fridays.
Weekdays
He never plays tennis on weekdays.
わからないよ（理解にこまりますねぇ）
I don't understand.
わからないよ(知らないよ）
I don't know.
Tuesday & Friday
Kayo ( She) doesn't usually study on Tuesdays or Fridays.
Tuesdays and Fridays. I ~
I don't usually study on Tuesdays or Fridays.
What days does Charles never cook?
Sundays, Tuesdays or Wednesdays.
Monday through Friday is called?
Weekdays
助けてくれませんか？
Can you please help me?