at weekdays和on weekdays有什么区别?该怎样用?

on weekdays还是at weekdays at weekdays和on weekdays有什么区别?该怎样用? on weekdays,at weekdays和on weekday,分别是什么意思?它们的区别分别是什么on weekdays，at weekends和on weekday分别是什么意思？它们的区别分别是什么，上面的错了 They eat lunch at school on weekdays,改一般疑问句 weekdays前的介词应该是什么?(on.in.at?) weekdays 前面用 on 还是用 in 还是用 at I get up at 6:30 on weekdays什么意思 在英语中,在工作日和在周末分别怎么说?是at the weekdays和on the weekends 吗? It opens at 8 am on weekdays,but at 9 at weekends.为什么这句话中,工作日和周末前面的介词不同呢 英语老师来啊on weekends on the weekend at weekends at the weekend in weekends in the weekendin weekdays in the weekday in weekday on weekdays on the weekday on weekday at weekendsat weekday at weekdays They eat lunch at school on weekdays.就at school提问 改错Sandy doesn't be at home on Weekdays.She is at school. It closes at 10:00 p.m.during weekdays and at midnight on Saturday and Sunday. 在周末英语怎么说是on weekends还是at weekends.在工作日是on weekdays吗? The bank closes 《at 7：30》 on weekdays 用whenThe bank closes 《at 7：30》 on weekdays 用when提问 急 on weekday 和on weekdays 一样么?还有on weekend 和on weekends 一样么 have a birthday dinner_____A in next weekB on next weekC next weekD at next weekLily is very health she eats very___A good。B much。C many。D well Mike goes to bed at 21:00 on weekdays.对21:00提问,该怎样写啊?＿＿＿＿Mike＿＿bed on weekdays?