为什么“在那些日子”是in those days,而这些日子是these days,不是in these days
问题描述：
为什么“在那些日子”是in those days,而这些日子是these days,不是in these days
They 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
答
They are busy preparing for the maths test these days.可以改成：In these days,they are busy preparing for the maths test.而下一句也可改成：They could not go to school those days.