All verbs fall under one of the two categories:
Strong (صَحِيح)
A verb free from the weak letter (ا و ى) as one of its root letters.
Regular (سَالِم)
None of the root letters is repeated or has a Hamzah.
شَرَبَ، ضَرَبَ
Has a Hamza (مَهْمُوزٌ)
One of the root letters is Hamzah
أَكَلَ ، سَأَلَ، مَلَأ
Doubled (مُضْعَفٌ)
One of the root letters is repeated
Tripartite (ثُلَاثِيّ)
شَدَّ، مَدّ
Quadripartite (رُبَاعِيّ):
زَلْزَلَ ، رَقْرَقَ
Weak (مُعْتَل)
One or more of the root letters of a verb has a weak letter (ا و ى)
Initial Weak (مثال)
The first letter of the verb is a weak letter
وَعَدَ، وَثَقَ
Medial Weak (أجْوَفٌ)
One of the letters in the middle of a verb is a weak letter
قَامَ، بَاعَ
Final Weak (نَاقِصٌ)
The last letter of a verb is a weak letter
سَعَى، رَمَى، نَمَا
