帮我区分on holiday ,on holidays,at the weekend,at weekendsjim wants to do sports on Saterdays and Sundays.同义句jim wants to do sports on＿＿＿＿＿＿＿＿．

帮我区分on holiday ,on holidays,at the weekend,at weekends
jim wants to do sports on Saterdays and Sundays.
同义句jim wants to do sports on＿＿＿＿＿＿＿＿．

jim wants to do sports on weekend
on holiday 在休假
at the weekend 在周末（星期六和星期天）
at weekends 每周末地

on holiday 是在度假的意思
on holidays 是每逢假期的意思
at the weekend 在周末
at weekends 是每逢周末的意思．