Which verb form is used to indicate the perfect progressive tense?

a) verb + -ed
b) be + verb + -ing
c) have + been + verb + -ing
d have + verb + -ed

a is correct

mark me brainliest

hope this

~courtney

search it up on google or think from your brain make it work harder.

he uses the metaphor autumn.

the grass-plot before the jail, in prison lane, on a certain summer morning, not less than two centuries ago, was occupied by a pretty large number of the inhabitants of boston; all with their eyes intently fastened on the iron-clamped oaken door.

— the scarlet letter,

nathaniel hawthorne

''eyes intently fastened''

''iron-clamped oaken door''

are the answers