Hello Crosi~ It's your turn

LINES

The super-imposed lines some are arching a bit and fraying the end but is not biggie, in your next warm-ups try to vary your line do more long lines, curvy lines, spiral, etc. Your planes are great! They look solid and you packed your pages~ Btw I didn't see the ghosted lines page.

ELLIPSES

The ellipses in the tables are snuggling between each other without over lapping you went through them two or three times, that's good.

The planes with ellipses are also good they're tightening within the boundaries of the planes and the funnels cut the ellipses in two equal halves, in general nice and solid work. The only thing I'd like to mention is that some of the ellipses are a bit wobbly but I gess this wobbliness is going to disappear with the practice.

BOXES

Plotted perspective is well done. The rough perspective looks nice, some of your lines try to hit the VP and are even.

You really went wild with the rotated boxes... it seems that patience ran out at some point. You have to remember to use the neighbour lines as a guide, you left a lot of space within every box and this add more complexity to the task. The outer boxes are the ones with the most problem. Try to draw the edges with neighboring lines first, it doesn't have to be 100% correct just a guess. You can also try rotating your page, rotate it in such a way that it is easier for you to guess where the vanishing points are. And if you have problems with patience, take breaks, there is nothing wrong with that, and so you can refresh your mind.

The organic perspective are ok, but did you plot your lines? It's important that you put a starting and ending point not only in the ghosted line exercise but for all the line you want to draw, they have to be planned beforehand. You could have added some more line weight in the overlapping.