9:38 PM, Friday April 7th 2023
In these boxes you have a habit of relying on 2 point perspective rather than using the Y method to construct your boxes. This results in you having one vanishing point set infinitely in the distance and that set of lines being parallel because of it.
Boxes 24, 27, 28, 33, and 35 are all examples of this.
Seeing as how we're extending all 3 sets of lines we want to be thinking of where we're placing all 3 of these vanishing points. Not only that but you're actively disregarding some boxes that utilizie the Y method for some reason, like the boxes on the left side of the page that has boxes 21 and 22 on it.
This hesitancy to use the Y method makes me worry that you may not be fully understanding some of the concepts here so I'll be asking you to draw 10 more boxes please. This time be sure to utilize the Y method, think of where all 3 of your vanishing points will be placed and how their sets of lines will converge towards them. If you make mistakes don't just abandon a box either, work with your mistakes rather than grinding needlessly.
If you have any questions before starting feel free to ask them if they'll help provide clarity.
Next Steps:
10 more boxes please.