kavita nice sketches , i have checked your entire gallery i think you are a portrait artist focousing on eyes but to make live eyes little more practice is required as well as pay attention on shading use proper pencils to get correct shade b’coz good shade makes a sketch 3d sketch. use profestional faber castal pencil set 2h to 6b or staedtler’s mars lumograph pencil set it is best to make good drawings.
you may visit my gallery on desi painters .com
regards
JATIN

hard to make out which is which.
Try more details on the eyebrows for angry expression
just a suggestion