Hogy kell átírni Infinitive-be?

a feladat:Write the corresponding form of the infinitive as in the example.

example: he wrote - (to)have written

nemvagyok benne biztos,hogy jól csináltam:

it is believed - (to) be believed (ide kell a be?)

they are talking - (to) be talking

he will arrive - (to) arrive

she had cleaned - (to) have cleaned

he was ironing - (to) have been ironing

it was built - (to) built ??