Be careful. You asked and we answered.
1- Memorize singular and
plural adjectives together.
2- Plural adjectives might
be tricky when formed by internal structural alterations
(instead of a simple suffix added to the end of the word).
However on a good note:
The internal structural patterns are frequently the same
from one adjective to the next.
beautiful pleasant big
The above three plural
adjectives all have the long "alif" added after the second
letter in the stem.
By the way, the long "alif" refers to the "alif"
acting as a vowel and not a consonant. The usage of long is
appropriate because vowels extend the word as opposed
to the more blunt consonants.
Develop an ear for the plural form of adjectives.
IMPORTANT: Recognize familiar sound patterns for the plural
Egyptian Colloquial "plural Adjectives" have only one form
- SHOWN IN TABLE 1 ABOVE.
MSA "plural adjectives" have two forms (masc. and
SHOWN IN TABLE 2 BELOW.