The perfect passive participle

These are translated as 'having been ...'. They agree with their noun in case, gender and number. They take 1st and 2nd declension endings.

Singular Plural
m f n m f n
Nom. portatus portata portatum portati portatae portata
Acc. portatum portatam portatam portatos portatas portata
Gen. portati portatae portati portatorum portatarum portatorum
Dat. portato portatae portato portatis portatis portatis
Abl. portato portate portato portatis portatis portatis

There is no perfect active participle in Latin, so you cannot say 'having carried'. You would have to use a subordinate clause, or use the perfect passive participle of a deponent verb, instead.