If you drop your cell phone in water, it is no longer covered by the warranty.

a. Adjective

b. Adverb

c. Noun

People who sound overconfident usually aren't.

a. Adjective

b. Adverb

c. Noun

Which words are you supposed to identify? Which part of speech do you think they are?

If you drop your cell phone in water,

who sound overconfident

Thanks. I'll be glad to check your answers.

The word "covered" in the sentence "If you drop your cell phone in water, it is no longer covered by the warranty" is a verb. It is the past participle form of the verb "cover." The verb "covered" is used in this sentence to describe the state or condition of the cell phone in relation to the warranty.