I have been ill for the last week.这句话对吗

没一句对．
应该改为：I have been ill since last week.
或者： I have been ill for a week.

感觉都不对
i have been ill for ten days的涵义是“我已病了十天，但现在病尚未好”
i was ill for ten days的涵义是“我（曾）病了十天 痊愈没未知

凭语感感觉都不对
I have been ill since the last week?

二楼对