Simple:
* I felt alone in the crowded room.
* She walked alone down the empty street.
Descriptive:
* The old house stood alone on the hill, a silent sentinel against the wind.
* The dog sat alone by the fireplace, watching the flames flicker.
Figurative:
* He felt alone in his grief, even surrounded by loved ones.
* The artist was alone in her vision, creating a world unseen by others.
With different grammatical functions:
* I prefer to be alone sometimes. (adjective)
* They left me alone to finish my work. (adverb)
* My sister lives alone in a small cottage. (adverb)
As part of a phrase:
* She was all alone in the world.
* I couldn't stand to be left alone any longer.
Remember, the meaning of "alone" can shift based on context. It can express isolation, solitude, independence, or even a sense of power or freedom.