Hi Rizzbor! Overall you've done a pretty good job, I'll go over all the things I've found though so you can keep improving, let's go!:

Starting with your lines overall they're pretty confident, which is great! I can see you aren't afraid of missing the ending dot if that means that your line will be straight and confident. Accuracy is pretty good already as well, keep practicing like that and it'll get even better! The main thing I want to say is that sometimes your lines fray on both ends a bit. Make sure you always place your pen carefully at the start of each line so lines can fray on maximum one end. On superimposed lines try to do some longer curves as well, they're good to practice.

Moving onto your ellipses, they are a bit wobbly. Remember that in ellipses as well as lines you should try to do them as confident as you can, don't hesitate in sacrificing accuracy to get them smoother and more confident. They also get a bit pointy on some ends as well at times. Keep in mind that ellipses have to be symmetrical , so they can't be different on both ends. I think you specially do this on the ghoste d planes exercise. On this exercise as well maximum priority is to get the ellipses confident and smooth, I think you might be trying to make the ellipses fit on the ghosted planes by deforming them, but as I said earlier maximum priority is to make them confident, and in this exercise that they touch the contact points, they won't change based on which part of the plane they are.

Lastly on funnels you have done some pretty confident ellipses, though the smaller ones are a bit wobbly (keep in mind you always need to ghost them and draw them with the shoulder even if they're small). The minor axis as well on some funnels it doesn't cut the ellipses in 2 identical halves. Make sure you always aim for it even if that means ignoring the initial curves.

Finally in your boxes a few things I want to comment:

-Overall your lines are pretty good just like in the last section so that's great! I'm glad to see you didn't get overwhelmed by the boxes and started drawing wobbly lines or repeating some of them.

-Rough perspective is pretty good overall, nice job at drawing the vertical and horizontal lines, and your depth lines are pretty close to actually converging in the vanishing point, good job!

-On rotated boxes you've done a pretty good job as well, you kept the boxes close together and rotated them which is just what you were asked. The only thing here is that some lines on the boxes that should converge diverge instead. This is something minor that will get clear during the box challenge so no need to worry about it though!

-Lastly on organic perspective you're doing a pretty good job at drawing the boxes, the perspective is a bit off but no need to worry about that as you'll work on it as well on the box challenge. Main thing here is that I think you haven't drawn starting and ending dots before drawing all of your lines. Make sure you always do it as it's super important for the ghosting method.

You can also draw superimposed lines in the parts of boxes that overlap to clarify which box is on top and which behind.

Overall like I said I think you've done a pretty good job, but I want to ask you one more page of ghosted planes with ellipses, just to make sure that you know how to draw them confidently, good luck and keep up the good work!