An interrogative sentence or
clause that begins with an interrogative adverb or pronoun, e.g Who
are you trying to phone?
A question which begins with a wh- word, for example, Who are you?See also
Another term for interrogative/relative
adverbs and pronouns.
Word ClassNouns, adjectives, adverbs, prepositions and verbs among others are different types or classes of words. They are also known as 'Parts of Speech'. Word classes contain words which share properties.