Question

His speech had become increasingly slurred

Answer 1

HERE IS YOUR ANSWER.

THE WORD CLASS OF INCREASINGLY IS ADVERB.

HOPE THIS HELPS YOU.

Answer 2

Answer:

His speech had become increasingly slurred.

The word 'increasingly' is an adverb in the above sentence.

Explanation:

An adverb is a word which tells something about the verb. It tells about the quality, place, time, degree of the verb. It answers the questions like when, in what way, how, where and to what extent.

In the above sentence, the word 'increasingly' tells about the way the person's speech has been slurred.