Can someone identify each word as noun, pronoun, verb, adverb, adjective, article, preposition, conjunction, interjection, infinite, gerund or particple.

he was a very silent man by custom

Identify the statement that uses the verb mood in the interrogative. a. she could if you ask politely. b. could an angel break my heart? c. in the group, tiger could run the fastest. d. stop imagining about what he could do.