The Special Situation of French Positive Adjectives Becoming Negative

First of all, the usage of adjectives in these four sentences is based on the yin and yang of nouns. This is very clear.

Secondly, beau /belle is the masculine and feminine of the adjective "beautiful" respectively, belonging to a special group of yin-yang deformed words. There is also a form of the word "bel", which is used before the masculine singular noun beginning with vowel or consonant H. For example: bel homme

Thirdly, the second group vieux/vieille is the masculine and feminine form of the adjective "Lao", which is also quite special. It has a special form like the last group, and its usage is the same as "vieil".

Finally, there are many special rules in the change of adjectives of yin and yang, which are not all as simple as adding e or adding e to double consonants. Need to remember the specific situation.