Final answer:
To form a comparative adjective, you generally drop the adjective endings, add -ior, and then add second declension endings.
Step-by-step explanation:
To form a comparative adjective, you generally drop the adjective endings, add -ior, and then add second declension endings. This is commonly true for adjectives with two or more syllables, but not always. For example, the adjective 'good' becomes 'better' in the comparative form without dropping any endings. So, the statement in the question, that you drop the adjective endings to form a comparative adjective, is not always true.
Learn more about Comparative adjectives