on weekday 和on weekdays 一样么?还有on weekend 和on weekends 一样么

on weekday、on weekday的意思 weekday 和weekend用on还是at on weekday 和on weekdays 一样么?还有on weekend 和on weekends 一样么 weekday和weekend前面用in,on还是at 是on weekdays还是on weekday? 是on weekday还是on the weekday是on the weekend 还是on weekend急 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 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 是on the moring of weekday 还是 in the of weekday? we are busy on weekday的同义句 on the weekday还是on weakday at还是in the weekend 还有以上的weekend weekday 用加s么 Nice watches TV on weekdays.（对watches TV 提问）-（.） （.） Nice (...) on weekday? My parents often take me there on( ) A summer B month C weekday D weekends my friend jack works hard in a factory on weekdays.为什么用weekdays而不用weekday 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 weekday kind weekday 和weekend的区别kind 可以这样用么classical music is a serious kind of musica adj kind of sth 还是这句话怎么改这题要选什么i get up early___weekays but i get up late__the weekend.A.on on B.at at C.on at D.at on weekday和weekdays的区别?