[Footnote *: There is no past participle in the active voice.]
Simple
having seen
Progressive
having been seeing
Perfect Tense—Passive Voice
having been seen
GERUNDS
Present Tense—Active Voice
[Footnote *: There is no past participle in the active voice.]
Simple
having seen
Progressive
having been seeing
Perfect Tense—Passive Voice
having been seen
GERUNDS
Present Tense—Active Voice