I have been up to this

I have been up to this up to now只能与现在完成时连用吗?Up to now I have been reading this book I have been up to so far 如何翻译 this is the place -----i have ever been to We have been good friends----I come to this scool. I have been to. I have been to I have been have give up I have never been to Hainan,but this summer I will have a ch What have you been up to lately? what have you been up to today. what have you been up to