这些天是these days,那些天却是in those days,为什么?一个加in一个不加?

这些天是these days,那些天却是in those days,为什么?一个加in一个不加? 为什么“在那些日子”是in those days,而这些日子是these days,不是in these daysThey are busy preparing for the maths test these days.不能写成in these days吗?In those days,the could not go to school.不能写成those days吗 这些天一直在下雨 It's raining ( )( )( ) these days急 这些天消息传播得很快.News ____ _____ ____ these days. these days是哪个时态的标志 these days的时态His father_____(work) in that factory these days.为什么现在完成时不可以，强调从过去一直持续到现在或者一般现在时，强调这些天他在那个工厂工作是一个经常存在的状态（有时间规 Everyone's losing money these days,he said继续提问 这句话用了那些语法. Everyone's losing money these days,he said继续提问 这句话用了那些语法. these days 是什么时态? These days more than These days ,many students These Days 歌词 Days Like These 歌词 They hate these grey days.是啥意思 您好,有个叫“可人”的女孩这些天很高兴:A girl named 可人 is so happy these days.可如此翻译. 汉译英 I am teaching ( ) ( ) ( )a car from my father these days 这些天我正在向我的父亲学开车 这些天阳关灿烂 用英语怎么说好像不对吧 这题是这样的：The sun these days 中间填两个单词 呵呵 关于DAY的短语例如these days这些,并写出意思