Let's break down the sentence: "Melkor escaped in the darkness and confusion."
PN.SG-NOM.SUBJ
Melkor
3SG.PST.INT.V
escaped
PREP
in
DEF
the
SG-N-OBJ
confusion
CON
and
SG-N-OBJ
darkness
PN.SG-NOM.SUBJ
Belegurth
3SG.PST.INT.V
othrast
PREP-ADV
vi
DEF.SG-N-OBJ-LEN
e·gang
CON
ah
DEF.SG-N-OBJ-LEN
e·vôr
In this sentence you will notice.