WH-questions

questions seeking information that in English would contain ‘question words’ that typically start with wh- such as ‘why’, ‘when’, ‘who’ and ‘where’ (note however exceptions such as ‘how’). Wh-questions contrast with yes-no questions (such as ‘Did you read that book?’) where there is no question word and where the answer being sought is ‘yes’ or ‘no’ rather than a piece of information.