When nouns become adjectives, under what circumstances should we add full, y, ERN, n, LESS, ING or others?

Ways to change nouns into adjectives In all kinds of English, sometimes adjectives can be changed by adding different prefixes or suffixes before or after nouns. Such as: sleep → sleep → sleep (sleepy, sleepy), help → help, etc. In this paper, the methods of forming adjectives from nouns are summarized as follows: 1. Nouns plus -y form adjectives. Such as: rain → rain → wind → wind → cloud → cloud → snow → snow → sun → sunny, sunny [special reminder: don't forget to double n] luck → lucky → noisy → noisy [special reminder: don't forget to remove e] health → health 2. Nouns plus -ful form adjectives to express affirmation. Such as: use → useful (beneficial) help → beneficial (beneficial) injury (injury, damage) → harmful forgetfulness → forgetfulness and beauty → beauty [special reminder: don't forget to change -y to -i, plus -ful] care (care, care) → be careful, be careful of pain → pain and surprise → wonderful colors → colorful; Vivid) thanks → gratitude (appreciation) 3. Nouns plus-minus form adjectives to express negation. Such as: use → useless care → careless injury → harmless → help → no help 4. Noun +ly forms an adjective. Such as: friends → friendship → lovely month → monthly activities → lively days → daily life 5. Add -ese after the names of some countries. Such as: China (China) →Chinese (China) → Japan (Japan) →Japanese (Japan) 6. Add -n to some nouns ending in vowels to form adjectives. For example: Asia → Asia → America → America → Australia → Australia → 7. Add -our after some nouns to form adjectives. For example: danger → danger fame → fame [special reminder: don't forget to remove e] 8. Nouns plus -en form adjectives. For example, wool → wool → wood → wood → gold → Jin Jiu, and add -an before some nouns ending in vowels to form adjectives. Such as: Europe → Europe (Europe) 10. Add -ish after some nouns to form adjectives. For example: Fool → Fool → Spanish → Spanish 3