关于时间状语 these days 的使用

these days 多用在现在完成时里,但是也要看上下情境.
What have you done these days?
这些天来,你做了什么事?
We never see each other these days.
我们这些天没有见过面.
Jack is away all the time these days.
这些天来杰克老是心事重重的.
Your son's trouble is very common these days.
你儿子的病是目前较常见的.
Are you free now?how are you these days
你现在有空吗?这些天过得还好吧?