为什么ask for three days' leave 中days'要用逗号?这里three days' 是不是相当于形容词的用法?

英语翻译1 ask for [a] leave 请假 这个意思的时候,记得是ask for a leave这个 a 2 ask for three days' leaveask for a three-day leave （ three 前面的 a 是不是 必须要有?如果没有错不?）3 请一天假 能说 ask for a day ask for three-days' leave有错吗 ask for three days 'sick 帮个忙啦,急 She was so terribly ill that she had to ask for ________________.A.a three day leave B.three-days sick leavesC.a sick leave of three days D.three-day sick leaves 为什么ask for three days' leave 中days'要用逗号?这里three days' 是不是相当于形容词的用法? i would like to ask for a three-day leave.--------,we have lots of work to do .A do not mention it B forget C do not worry 选哪个,为什么B forget it I watch more than three hours of tv a day.这里为什么用of不用three hours for tv I want.to ask for three days leave 为什么是ask for “for”是什么意思,为什么不是ask to 为什么ask sb.for sth.ask后面加for? for our spring field trip,we are going a three-day visit to mount Tai为什么用介词for啊? The Whites went for sightseeing during the_____holiday.A.three days B.three-days C.three-day D.three day ask for two days off 还是two-day off My I ask for (3day,3 days') leave 请假用ask还是ask for,比如请三天假是ask thee days off 还是 ask for three days off please ask the for teacher help 为什么用ask He was so ill that he had to ask for____A.three-days sick leaveB.a three day sick leaveC.a sick leave of three daysD.a three-day sick leave能不能把为什么选说一下呢？我给的积分不低哦 We stayed in Beijing for three days.(for three day 下要加横线）划线提问