Hello!

The superimposed lines: Your lines are confident, therefore they're shown without wobble in lines and arching lines.

The ghost lines: Most of them aren't stop at the end point. There are some curving end points. You wanna keep it right at the end point so that you curve your line at the end. Try to ghost until you feel confident that the line will start from the start point and stop at the end point before draw it.

Table of Ellipses: There are some ellipses are overlapped and not touch each other. However your lines are confident and 2-3 times drawn on each one.

Ellipses in Planes: They're good.

Funnel: The symmetry and degree shift is the main goal on this exercise. You should pay attention to how the minor axis is cut in the center of ellipses. And the degree shift from narrower to wider starts from the center of the funnel. Watching this video will refresh your understanding. https://www.youtube.com/watch?v=xiMEIg2fU-g

The plotted perspective: You didn't draw all the line as I show you. Be prudent on what you draw. This exercise you have to draw through each box. I draw some (in blue line), not all. https://imgur.com/a/WRGM9bL

The rough perspective : Your width lines should be parallel to horizon and height lines perpendicular to horizon. Yout lines are not straight enough. Please use the ghost method to accomplish this exercise.

The organic perspective: This exercise will help you to consider about which objects is near or far by the size of the box.