Hi Gaogamesh! Here's some feedback on your exercises for lesson 1.

Lines - Superimposed lines are okay. There is fraying at both ends for several of your lines which is something we should avoid. Try to take your time to carefully place your pen on the starting point before executing your line. Ghosted line looks good. There's no wobbliness in your lines. There is slight arching which could be caused from not drawing using your shoulder as a pivot point or by how you hold/maneuver your pen. Ghosted planes look good too. Remember to place starting and end points when you're ghosting instead of free-handing your lines. You seemed to have missed this for the crosses + (not the X from corner to corner). Overall, lines seem confident and flowing!

Ellipses - Your ellipses look good. In your ellipses in ghosted planes exercise, there are a couple that didn't make it to being drawn through at least twice. The rest are fine being drawn through three time. Ellipses in tables needs a little work. A few ellipses are not touching any bounds and many only touching one bound leaving empty space around them. The ellipses should be fit snuggly into their tables. Other than that, their angles are consistent within each table, good size variation, and not a lot of overlapping. Funnels look good. The ellipses are fit snuggly, there is a gradual change in size. Only note is to draw through your ellipses two-three times.

Boxes - Plotted perspective looks good. Rough perspective looks fine as well. It also seems you forgot a line for the top left corner box in the middle frame on the first page. The rotated boxes is challenging but I think you did okay. The front faces of the boxes, for the most part, are rotated, which is what we're aiming for and I think you did this well for the middle row and middle column. I think a struggle you had was with the backs of the boxes. I think what would have helped rotate the back of the boxes more was to use the corners of neighboring boxes to plot points to construct new boxes. Organic perspective looks okay as well. Some sizes for the boxes seem to be out of place with their location on the line but for the most part, there is a sense of the depth a gradual change of size. One thing to keep in mind is to not repeat lines, meaning to not attempt them again to fix a line--seen on multiple boxes throughout the exercises.

But congratulations and good job on completing lesson 1! Be sure to use these exercises as warm-up to start each DaB session. I recommend the ellipses table focusing on drawing the ellipses through 2-3 times, touching the bounds so they're fit snuggly, and ghosted lines to straighten out arching.