Here are some examples of sentence types that use question marks:
* Yes/No questions:
* Are you going to the party?
* Did you finish your homework?
* Wh- questions:
* What is your favorite color?
* When is the movie starting?
* Where did you go?
* Tag questions:
* You're going to the store, aren't you?
* It's a beautiful day, isn't it?
* Rhetorical questions:
* Does anyone actually enjoy doing laundry?
* Is the sky blue?
* Who cares?
Important note: Question marks are not used after sentences that are statements, commands, or exclamations, even if they contain question words like "who", "what", "where", etc.
Examples:
* Statement: I know who stole the cookie.
* Command: Tell me what happened.
* Exclamation: What a beautiful day!