The three hamzated categories display different active, passive and imperative outcomes:
Word / formMeaning / explanation
First-radicalأَكَلَ، يَأْكُلُ، آكِلٌ، مَأْكُولٌ، كُلْ.
Middle-radicalسَأَلَ، يَسْأَلُ، سَائِلٌ، مَسْؤُولٌ، اِسْأَلْ.
Final-radicalقَرَأَ، يَقْرَأُ، قَارِئٌ، مَقْرُوءٌ، اِقْرَأْ.
A hamzah written on alif, wāw or yāʾ does not by itself determine the category. The original radical position, supported by morphology, does.