Hello!

Lines - For the ghosted lines exercise you could've drawn more lines. It's a good idea to fill the page. You should also practice longer lines that are the width or length of the page for this exercise. For superimposed lines really good job fraying on only one end. I think you should focus on making sure your lines are the correct length since they don't wobble much and have consistent trajectory.

Ellipses - Many lines are pretty wobbly. Make sure to ghost, and make sure you make fast and confident marks. Don't worry if they are the wrong size or shape. They will look a lot nicer if the lines are smooth. I think your ellipses consistently have the right shape and size anyway. And good job aligning the minor axis on the funnels exercise.

Boxes - For rough perspective some of the lines are pretty wobbly, so ghost beforehand and make sure to practice linework outside of this exercise. Other than that these exercises look nice. For the organic perspective, a lot of lines are parallel or diverging, undermining the solidity of the box. The boxes in the rotated boxes exercise look more solid because they don't do this. The 250 box challenge will improve this however. Also try to draw a bigger variety of shapes of boxes, they don't all have to be cube-like. You can also make the closer ones bigger, so big they can overlap the boxes behind them.

Overall great job, I think your ready for the 250 box challenge and I think it will help you out a lot. These exercises can now be warm-up exercises. You don't have to do all of them every time but revisit them pretty regularly so you can keep improving.

Good luck!