I would say
Only Gerasim recognized it and pitied him.
Gerasim alone did not lie; everything showed that he alone understood the facts of the case and did not consider it necessary to disguise them,
The two things a clause needed to considered a clause is a subject and verb.
Answer:
Hi !
Dialogue = to explain character interactions
Description = to establish the setting
Flashback = to provide background information
; )
