The subject of a passive verb is called ‘Representative of the doer’
Passive Perfect
The passive is made by a change of vowels inside the verb. The inflections are the same as for the active except the vowel of the prefix of the imperfect. In stem I the perfect is kutiba كُتِبَ and the imperfect yuk.tabu يُكتَبُ. The same scheme holds good for the derived stems; if there are more than three syllables, the extra one has u (damma) in the perfect and a (fatha) in the imperfect. A ا in the perfect of III and VI becomes uw وُ (damma followed by waw) in the passive. The passive imperfect of IV is the same as that of I.
Passive Subjunctive Imperfect
:For making this tense, the u of the passive indicative is changed to a the ni and na نَ َof the two syllabled inflections are cut off; while the feminine plurals are not changed.
Passive Jussive Imperfect
:This is formed by dropping the inflection u ُ of the passive indicative; in other cases it is the same as the passive subjunctive.