2do verb
does; did; doing; negative forms do not or don't; did not or didn't; does not or doesn't [auxiliary verb] 1 a — used before the subject in a question ▪ Do you play the piano? ▪ How well do you play the piano? ▪ What did he say? ▪ What does her husband do for a living? ▪ When does the train leave?
b — used to form brief questions (called tag questions) that come at the end of a statement ▪ You play the piano, don't you? ▪ So you play the piano, do you? ▪ Her husband works with computers, doesn't he? 2 a — used with not to form negative statements ▪ I do not know. = I don't know. ▪ I don't believe anything he says.
b — used with not to form commands ▪ Do not lie to me! = (more commonly) Don't lie to me! ▪ Don't touch the stove. ▪ Don't be afraid. Everything will be all right.
c somewhat formal — used before the subject in a statement after words like never, seldom, and rarely ▪ Never did he see his native land again. [=he never saw his native land again] ▪ Seldom do we experience such joy! [=we seldom experience such joy] 3 — used to replace another verb or verb phrase ▪ “May I come in?” “Yes, (please) do.” ▪ You work harder than I do. ▪ “Do you play the piano?” “No, I don't, but my sister does.” ▪ He works hard and I do, too. = He works hard and so do I. ▪ Don't touch the stove: if you do, you'll burn yourself! ▪ She asked me to open the window, which I did. = What I did was (to) open the window when she asked me to. ▪ (informal) “Can you finish it by tomorrow?” “Sure, boss, will do!” [=I will finish it by tomorrow] ▪ (informal) “Can you finish it by tomorrow?” “Sorry, boss, no can do!” [=I can't finish it by tomorrow] ▪ (Brit) “Are you going to the party?” “I might do.” [=I might] ▪ (Brit) He can work hard and I can do too. [=I can too] ▪ (Brit) Would you mind feeding the dog if nobody else already has done? [=if nobody else already has] 4 a — used to make a statement stronger ▪ You really do look lovely today! ▪ “It hurts!” “Well, I did warn you it would sting a little!” ▪ I never did like him much. ▪ Oh, do be quiet!
b somewhat formal — used as a polite way to tell or urge someone to do something ▪ Do come in and have a seat. ▪ Do come and see us again soon. ▪ Do be careful.
b — used to form brief questions (called tag questions) that come at the end of a statement ▪ You play the piano, don't you? ▪ So you play the piano, do you? ▪ Her husband works with computers, doesn't he?
b — used with not to form commands ▪ Do not lie to me! = (more commonly) Don't lie to me! ▪ Don't touch the stove. ▪ Don't be afraid. Everything will be all right.
c somewhat formal — used before the subject in a statement after words like never, seldom, and rarely ▪ Never did he see his native land again. [=he never saw his native land again] ▪ Seldom do we experience such joy! [=we seldom experience such joy]
b somewhat formal — used as a polite way to tell or urge someone to do something ▪ Do come in and have a seat. ▪ Do come and see us again soon. ▪ Do be careful.
— compare 1do
