Questions

Responding to yes/no questions: Yes, I do. No, she isn't. Yes, they have.

Questions with who, what, where, when, why, which, how

Questions answered with yes or no: Do you like coffee? Is she coming?

Repeating questions to show surprise or ask for clarification

Questions with negative forms for surprise, confirmation, or persuasion

Short questions at the end of statements: isn't it?, don't you?, can't she?

Who saw him? (subject) vs Who did he see? (object)