Verbs are different from nouns in that they must adhere to their shapes strictly. Declining verbs is differentiated based on their shape, of which there are three:
Triconsonantal Verbs:
They must always follow the form CVCVC as their normal tense.
Biconsonantal Verbs:
They must always follow the form CVC, no exceptions.
Derived Verbs:
They have the loosest structure, but they cannot have more than three consonants and their last vowel must be an -â.