Lines

  • Starting with the superimposed lines, you are doing a good job at staying at a well-defined initial end, and keeping all the fraying on the other, however, there are some wobbliness and arching is apparent, this is due two not engaging your whole arm when drawing, please try to be mindfull of this issue on your future practice.

  • Next is your ghosted line, your linework is solid and confident, however, the starting point and ending point is a little thick, this is not against the rule. However keep in mind that you only need to place one with a single press, by making your points thicker, you are being a little bit more lenient with your hitbox, which can lead to you not getting the most out of this exercise, keep that in mind when drawing next time.

  • The same can be said to your ghosted plane's linework. And you also have organised them quite neatly.

Ellipse

  • Onwards to the table of ellipse, the composition is looking tidy instead of rushed, and you are being very mindfull of their positioning. Moving forward you should strive to go through them only two times, as it is ideal for this exercise.

  • Your ellipses in plane are missing, please reply to this after reading with them so I can have a look.

  • Your funnels are well done.

Boxes

  • Your plotted perspective is well done.

  • On the rough perspective you have tried to keep the alignment of the horizontal sides parallel and the vertical ones perpendicular, you have also trimmed off your mark points, however, it seems like you are not bothering to place them in some of your boxes's corners. This defeats the whole purpose of the ghosting technique, in the future you should always keep this in mind when drawing.

  • Your rotated boxes are turning out very well, you have kept the gaps between boxes narrow and each quadrant is looking roughly the same size. You can try to add some lineweight to specify the overlaps of the boxes.

And remember to practice these exercises as warm-ups, they should take only 5 minutes, and is a great way to sharpen your skills.