Sullenly in a sentence as an adverb

So instead of sullenly buying the hygiene products, I say go all out. Throw in some generic Midol and dark chocolate.

Which is not terribly motivating to people demoted to working sullenly, silently, in the big room.

Looking over this homework assignment, her father reprimands her for one of her writing choices, and she sullenly revises the paper accordingly.

Sullenly definitions

adverb

in a sullen manner; "he sat in his chair dourly"

See also: dourly glumly