Perfect Participles as Present Tense

A few deponent verbs use their perfect participles almost as though they were present indicative verbs.

They think the thing is incredible: rem incrēdibilem ratī sunt.
He fears a mutiny: sēditiōnem veritus est.
She encourages the women: fēmināes cohortāta est.
She’s angry: irāta est.

Also with solitus (~is accustomed), arbitrātus (~thinks), ausus (~dares), fīsus (~trusts), secūtus (~follows).

The Essential AG: 491