Lines and ellipses pretty good and confident in general, great job! Don't forget to draw starting and ending dots before making each line though, you've forgotten in some of the lines on the ghosted planes.

On boxes there are a few issues. First of all don't repeat exercises, post the exercises to the best of your ability, and then, you'll be told on the critique if you need to redo something or not. But don't do it on your own.

Next thing is that you are repeating some lines, no matter how off a line is, don't repeat it, keep going as if the lines were correct.

On rough perspective, extend your lines with a pencil, ballpoint or anything different, doing with a fineliner makes it a lot harder to see.

And lastly on organic perspective don't forget to draw through the boxes, we should be able to see the boxes that are being covered by others. You can clarify their relationship after with a superimposed line to the overlaps, but don't forget to draw through them.