Lines Section:

your lines are confident, only critique here is the ghosted lines are all roughly the same length so you could try a few shorter/longer ones

Ellipses Section:

you did a good job with confident lines and drawing through the ellipses 2-3 times.

for the funnels exercise make sure you're increasing the thickness of the ellipses as you move out too, not just making them larger overall. some of them are leaning to the left a bit too, focus on getting the major axis to be parallel with guideline drawn in the middle

for the tables exercise you could play around with angles more, really exaggerating leaning left/right in some sections

Boxes Section:

again, good job with confident lines. only critique here is for the rotated boxes it's a little difficult to see where the drawn through lines are going but it's good that you drew them through!