Form the comparative and superlative degrees of the adjectives.

1. Identify the base adjectives: Dry, good, small, big, large, bad, pretty, nice, angry, old.
2. Form comparative and superlative degrees. For 'dry', 'pretty', 'angry', add '-er' and '-est'. For 'good', 'bad', use irregular forms. For 'small', 'big', 'large', 'nice', 'old', add '-er' and '-est'.
3. The image shows 'dry' forming 'drier' and 'driest'.
Final Answer: The comparative and superlative forms are derived by adding '-er' and '-est' for most adjectives, with irregular forms for 'good' and 'bad'. The example 'dry' becomes 'drier' and 'driest'.