for three days的意思急

for three days的意思急 ask for three days 'sick 帮个忙啦,急 I will be there to attend this conference for three days,的意思 during the three days 的意思 in three days 和for three days区别 意思的区别.用法区别.是在三天还是三天后还是已经三天了 - three days later 的意思和用法、 与 in three days 的区别.three days ago 是三天前? I disappear for three days. 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? once three days 是不是3天一次的意思?我有个 ：once three days 和once for three days 哪个是 3天一次的 意思 如果都不对 请说下 请用初二的英语来解 不要用高中的 我觉得 once three days 是对的吧 once a day They have been there for three days.与they have gone there for three days.哪个是对的?为什么 Kate was not at school for three days=Kate was () () for three days注意是两个空的 “This shop opened three days ago 它的同意句”This shop has been open for three days.为什么?为 in three days within three days 都是表示在三天期间的意思吗?不定某一天 It has snowed for three days running. ask for three-days' leave有错吗 Som __________(visit) china for three days. in three days与three days later的用法 Kate was not at school for three days.Kate was ( ) ( ) ( )for three days.