“Question words,” also known as “interrogative words” or “WH-words,” are words used to ask questions. They are called “WH-words” because many of them start with the letters “wh.” These words are used to gather information and often appear at the beginning of a question. Here are some common question words:

1. Who: Used to ask about a person or people.
   • Example: “Who is coming to the party?“
2. What: Used to inquire about things, actions, or events.
   • Example: “What is your favorite movie?“
3. When: Used to ask about the time or timing of an event.
   • Example: “When will the meeting start?“
4. Where: Used to ask about a place or location.
   • Example: “Where is the nearest coffee shop?“
5. Why: Used to ask about reasons or causes.
   • Example: “Why did you choose that option?“
6. Which: Used to inquire about a specific choice or selection.
   • Example: “Which book do you recommend?“
7. Whose: Used to ask about ownership or possession.
   • Example: “Whose car is parked outside?“
8. Whom: Similar to “who,” used to ask about a person or people, particularly in more formal contexts.
   • Example: “Whom did you invite to the event?“

These question words help structure and guide inquiries, and they are crucial in forming complete and meaningful questions in English.