azalin excellent job! i think you've got enough of an understanding now to interpret these kinds of drawings on your own and start making bigger decisions. your edges are very good here, you lose them in the wrinkle pattern in the shirt and find them in other places...excellent.
an excellent drawing, but the value range is very limited compared to the original photo. again, that's an organizational decision that comes with the kind of mood you're trying to convey, etc. (but i'm sure you can see what a pain in the ass hatching a large dark area is, right?)
keep it up!
Sigit (i'm using right left with respect to the picture, not the model...) the right side of his mouth and the right triangular light shape on his cheek need to be much darker. i know the "pure" shadows are black in the photo, but some of those dark dark gray areas need to be kind of merged with the shadows just to make the picture read clearly. also notice how dark you made the pupil in the left eye--it's darker than any shadow in the drawing which makes it a little distracting. overall, you're coming along, but it really is all about value organization.
in Azalin's drawing, he didn't match the exact values in the reference photo (his drawing is much too light in value). But, he matched the relative values and organized and grouped them correctly according to the information in the reference photo.
p.s. The pen and ink thing is getting a little tired for me right now. if anyone wants to suggest another lesson topic, i'm all ears...