these days 和those days 分别用在什么时态?

these days 和those days 分别用在什么时态? those和these的区别是什么 为什么How are you those days.要把those 改为these These days 用什么时态,和those days有什么区别 these days与those days有什么区别 these days和those days的用法区别.要有权威性啊!如果可以的话请把出处告诉我. these和 those怎么区别 these days和those days前要不要加inrt..thx........可是我在我的教科书里明确见到用in的 that day, this day, these days, those days前用介词吗 that day,this day,these days,those days前用介词吗 Celia asks,What have you been doing these days?Celia asks () I () been doing those days. The writer was writing a book those days用these days改写 The writer was writing a book those days.用these days改写 英语选择题How are you and your family?A.these daysB.those daysC.on these daysD.in those days this these those的用法和区别 these days和still用于什么时态 these days和 recently 有什么区别? He (be)_rich in those days答案为什么是was,有these days的地方用于现在完成时,本句中有those days,为什么用于一般过去时 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