DO definition: 1. used with another verb to form questions and negative phrases: 2. used in a phrase at the end…. Learn more. Do is one of three auxiliary verbs in English: be, do, have. We use do to make negatives (do + not), to make question forms, and to make the verb more emphatic. … DO definition: to perform (an act, duty, role, etc.). See examples of do used in a sentence. Find out the differences between an MD and DO, and discover the pros, cons, risks, and benefits, and how it may affect health. 1. To behave or conduct oneself; act: Do as I say and you won't get into trouble. 2. a. To get along; fare: students who do well at school. b. To carry on; manage: I could do without your interference. To do is to act, perform, or undertake. When you do chores, you engage in the activity of cleaning the kitchen or taking out the trash. Do is one of the most frequently used verbs in English. You do many things in a typical day: you might do the dishes, do your job, and later on, do your taxes. Feasible comes from faire, the French verb meaning “to do.” Doable and feasible therefore originally meant literally the same thing: “capable of being done.” As a verb, do means to perform, carry out, or execute an action. It's one of the most common verbs in English, used in a wide range of contexts, from simple tasks to complex actions. When you do something, you take some action or perform an activity or task. Do is often used instead of a more specific verb, to talk about a common action involving a particular thing. Today, you'll learn how to use DO, DOES, DID, and DONE in English. Improve your English fluency by learning everything you need to know about the verb TO DO.