ABSTRACT
The imperfect subjunctive is easy enough to recognize, provided you know the verb’s infinitive. The imperfect subjunctive is in effect the infinitive with these endings added:
-m
e.g. amāre + m = amārem
-s
audīre + m = audīrem
-t
-mus
esse + m = essem
-tis
ferre + m = ferrem
-nt