是on weekday还是on the weekday是on the weekend 还是on weekend急

是on weekday还是on the weekday是on the weekend 还是on weekend急 是on weekdays还是on weekday? 是on the moring of weekday 还是 in the of weekday? on the weekday还是on weakday at还是in the weekend 还有以上的weekend weekday 用加s么 weekday 和weekend用on还是at on weekday、on weekday的意思 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 weekday和weekend前面用in,on还是at I take a boat from the island to the city center on weekday是 I take a boat from the island to the city center on weekdays 呵呵 是on the monday,还是on monday? 是on radio 还是on the radio? 是on the tuesday 还是on tuesday during the weekday还是during the weekdays 是on the way home还是on the road home? weekend & weekday 前面加什么介词?在周末,在工作日,如题,两个都加on?还是at,还是什么?.. 请问是on screen还是on the screen? 在地球上是on earth还是on the earth? “在星期一”,是on the Monday’还是on Monday