Question

Form the adverb of the following word:
Sad
a) Sadly
b) Sadder
c) Saddest
d) Sader

Answer 1

Hint: Adverb is a word or a phrase that qualifies or changes an adjective, verb, or another adverb, to express a relation of a situation, cause etcetera, for example: happily, beautifully, quickly. Many adverbs are made by adding -ly to an adjective.

Complete answer:
We make most of the adverbs by adding -ly to the adjective, for example:
Easy (adjective) > easily (adverb)
Graceful (adjective) > gracefully (adverb)
smart (adjective) > smartly (adverb)

Thus, the adverb form of the word sad will be ending in -ly. Adding -ly will make the sad turn into sadly, which is one of the options provided to us.

Hence, in the given question, the correct answer is an option (c.), ‘sadly’, as it ends with 'ly' and is spelled correctly.

Other options provided are incorrect because-

Options (b.) is incorrect because the word ‘sadder’ is a comparative adjective.
Option (c.) is incorrect as the word 'saddest' is a superlative adjective.
Option (d.) is incorrect as the word is misspelled and does not exist.
None of these are an adverb, except option (c.), sadly, which is an adverb ending in -ly.
Therefore, option (a.) sadly, is correct.

Note:
 Most adverbs end with the suffix -ly, however, many do not. Therefore, in any given question, form an adverb from an adjective carefully.
If you do not understand what an adjective is, an adjective is a word that expresses an attribute of something- it is the word class that qualifies nouns.