A=Why are you still watching TV it has been one hour already! B=I have been busy and I couldn't watch TV I have literally not watched it in days let me be please! I have been really busy today I haven't watched it all day please let me do it! Check out the differences between the past-perfect and the present perfect! it can be a little confusing, but this site does a good job of going over the main differences :) https://www.englishpage.com/verbpage/pastperfect.html https://www.englishpage.com/verbpage/presentperfect.html If your interested in signing up for lessons, I can gladly help you with any of your future questions!