Do Do is an irregular verb. Its three forms are do, did, done. The present simple third person singular is does: l Will you do a job for me? l I did some shopping this morning. l Have you done your essay yet? l He usually does his homework in front of the television. Do: forms Perform or take part in an action We use do to talk about actions in general, when we do not specify exactly what the action is: l What have you been doing today, anything interesting? l There is nothing we can do except w