-e vs é
At the end of -er verbs, the accent is the difference between the first and third person singular present tense and the past participle
-e - étudie, parle, visite
-é - étudié, parlé, visité

entre - (preposition) between
entré - past participle of entrer (to enter)

es - second person singular of être (to be)
ès - contraction of en + les

êtes - second person plural of être
étés - summers

eut - third person singular passé simple of avoir
eût - third person singular imperfect subjunctive of avoir

ferme - farm
fermé - past participle of fermer (to close)

fut - third person singular passé simple of être
fût - third person singular imperfect subjunctive of être

gène - gene
gêne - trouble, bother, embarrassment
gêné - (adjective) short of, embarrassed; past participle of gêner (to bother)

grade - rank, degree
gradé - officer