The eight examples from four derived forms establish several principles: a hollow verb is identified from its original root, a perfect may show long ā, an imperfect may show ī or ā, and an imperative may display a shortened stem.
Word / formMeaning / explanation
Form IVأَقَامَ, أَطَارَ.
Form Xاِسْتَعَانَ, اِسْتَعَارَ.
Form VIIIاِجْتَابَ, اِخْتَارَ.
Form VIIاِنْقَادَ, اِنْقَاضَ.
Accurate recognition also preserves distinctions of voice, active versus passive participles, and commands versus prohibitions. A paradigm becomes useful when form and meaning are understood together.