Question

many adjectives that tell what kind are changed to adverbs that tell how by the addition of -ly. here are some examples:
adjective \tadverb
cool \tcoolly
happy \thappily
even
evenly
when these adjectives and adverbs are used in comparisons, their forms have clear differences. study these examples:

adjective	adverb
happy, happier, happiest	happily, more happily, most happily
even, more even, most even	evenly, more evenly, most evenly

be sure to decide whether an adjective or an adverb is needed before choosing the correct form of the word.
circle the correct form of the adjective or adverb in each sentence.

1. one headlight is (more brightly, brighter) than the other.
2. the police officer spoke (kindly, kind) to the child.
3. summer is our (busiest, most busily) season of the year.
4. you are the (most nicely, nicest) man i know.
5. on dress - down day, staff members dress (more casual, more casually) than on other days.
6. the manager gave a (well, good) reason for the new rules.
7. this is the (most expensive, most expensively) outfit i own.
8. who works (quieter, more quietly), ned or al?
9. our efforts produced a (good, well) outcome.
10. this book is much (more interesting, more interestingly) than the last one by this writer.

• walked (swift, swiftly) down the street.

Explanation:

Question 1

The verb "is" is a linking verb, so we need an adjective to describe the subject "one headlight". "Brighter" is the comparative form of the adjective "bright", while "more brightly" is an adverbial comparative form. So we choose "brighter".

The verb "spoke" is an action verb, and we need an adverb to modify it. "Kindly" is an adverb, while "kind" is an adjective. So we choose "kindly".

The noun "season" needs an adjective to modify it. "Busiest" is the superlative form of the adjective "busy", while "most busily" is an adverbial superlative form. So we choose "busiest".

Answer:

brighter

Question 2