Arabic declinable and indeclinable verbs

As for the الأَفْعَال (verbs):

  • the الْمَاضِيْ and الأَمْر thereof are مَبْنِيَّانِ (indeclinable): the first on the الْفَتْح and the second on the السُّكُوْن , and
  • the الْمُضَارِع is مُعْرَب (declinable) except when the نُوْن التَّوْكِيْدِ (Nun of Intensification, Strengthening) or نُوْن الإِنَاثِ (Nun of the Feminine Plural) is attached (i.e. suffixed) to it.