Which sentence uses the past principal part, or form, of the verb sing? a. I am singing in chorus today. b. I will sing in chorus tomorrow. c. I sang in chorus yesterday. d. I have sung in chorus for one year.

Answer 1

The sentence that uses the past participle form of the verb "sing" is d. "I have sung in chorus for one year." The word "sung" is the past participle of "sing."