英译中every four weeks every fourth week

英译中every four weeks every fourth week four weeks later什么意思 Every week为什么不用weeks Hours in four days -days in four weeks We'll have four weeks' holiday.中为何不用week's或weeks,而用 weeks'? The pupils here ______ all kinds of exercises every day in the past four weeks.A.kept busy doing The pupils here_all kinds of exercises every day in the past four weeks.A.kept busy doing B.keep on doingC.have kept busy doing D.have been kept busy doi hours in four days-days in four weeks = 中文意思及英文答案days in four weeks every week还是every weeks?为什么不能是every weeks?到底是哪个. every four years代表什么 every four years什么意思? every two weeks 用什么提问? every couple of weeks 如题 能说every a few weeks every second week every two weeks 有什么区别 I can finish the work in?Four week's time.I can finish the work in?Four week's time.Four weeks timeFour-weeks time.Four week time 英语翻译four hours each day for 15 weeks in four weeks time 翻译下,s后面是一撇 for the last four weeks 用什么时态