In several past forms, the vowel on final tāʾ identifies the person and gender.
Word / formMeaning / explanation
فَعَلْتَyou (masculine singular) did.
فَعَلْتِyou (feminine singular) did.
فَعَلْتُI did.
The same endings remain in the passive past:
Word / formMeaning / explanation
فُعِلْتَyou (male) were acted upon.
فُعِلْتِyou (female) were acted upon.
فُعِلْتُI was acted upon.
The stem vowels express voice, while the ending on tāʾ still expresses person and gender.