DID may refer to: Dance India Dance, a reality dance show on Zee TV, first aired in 2009. Digital Image Design, a video game developer. Dog Is Dead, a five-piece indie pop band from Nottingham, England. Dissociative identity disorder, a psychiatric condition. Difference in differences, a statistical technique.

I do my laundry on Saturdays. They do their chores when they arrive home. He does nothing all day. She does charity work when she has time. The past participle of DO is DONE. Remember that past participles are accompanied by TO HAVE or TO BE (in the correct tense): I have done my homework.