once a week用什么时态

once a week用什么时态 英文中once a week用什么时态啊? once 用什么时态?懂的来.once/twive/ three times.单独出现用什么时态啊、那 once a week 呢 对once a week提问用什么 my mum washes the clothes once a week once划线用什么提问 for a week,once a week,in a week,after a week有什么区别 in a week 用于什么时态? 对once a week 提问用? 意思once a week once a week from next week 用什么时态? 对 once a week never for an hour three times ever对 once a week neverfor an hourthree timesevery daytwo hours提问用什么? he watches tv twice a week 知道twice a week 是固定搭配,那么用once time a week语法上有什么错误吗 once a week和twice a week used to 后面直接接动词还是动词的过去式He used to visit his mother once a week帮我看下这句时态用对了没有 Mom__(usual)goes shopping once a week填什么词 Jack 什么 his mother with the housework once a week? once a day在句中应用什么时态