Collocations for neglected - adj.

be, feel, lie, look, remain, seem, stand
His tools lay neglected on the workbench.

become, get

badly, much, sadly, seriously, sorely, woefully
It is a sadly neglected work.
The building is sorely neglected.

largely
comparatively, rather, relatively, somewhat
hitherto, previously
unjustly
She is an excellent and unjustly neglected author.

be, look
The group of street children looked ragged and neglected.

badly, grossly, severely

Neglected is used with these nouns:
aspect, child