There are three main types of questions: 1) those starting with an inquiring word like what, why, how, etc., 2) those starting with an auxiliary verb like is, are, do, 3) question tags used for confirmation that follow patterns based on positivity or negativity. Further types include yes/no questions that require a short answer of yes or no and follow patterns based on positivity or negativity in their formation. Questions can inquire about something to obtain an answer and help gain information.