This document discusses different types of interrogative words in English including interrogative sentences, adverbs, adjectives, and pronouns. It provides examples of each type. Interrogative sentences are questions that use helping verbs like "does" and "are". Interrogative adverbs ask about time, place, manner, quantity or reason using words like "how", "when", and "why". Interrogative adjectives include words like "which" and "what" used along with nouns. Interrogative pronouns are words like "who", "whose", and "what" used to ask questions. Finally, it lists common wh-words in English and provides examples of questions using them.