do

doverb

American /du/ British /duː/ Before a main verb, the helper do is often weak and sounds like duh, and does sounds like duhz. The strong forms return for emphasis, as in I DO like it. The past form did is dihd.
third-person singular does past tense did past participle done present participle doing

Do is used to carry out an action, to stand in for a verb already mentioned, and, as a helper, to form questions and negatives and to add force to a verb.

  1. performcarry out an action, a task, or a piece of work

    transitive [T] verb + object [V + obj]

    Collocations

    verb + noun do the work, do a job, do your best, do exercises, do business, do someone a favor

    Synonyms perform (perform is more formal); carry out

    Compare make (do is used for actions and tasks, make for creating or producing something)

    1. aperform a task or job, especially a regular one such as the dishes or the shopping

      Used with the and the name of a chore or activity: do the dishes, do the laundry, do the shopping, do your hair.

      transitive [T] verb + object [V + obj]

      Collocations

      verb + noun do the dishes, do the laundry, do the shopping, do the cooking
  2. be enoughbe enough or right for a purpose

    Often with will or won't: this will do means this is enough or acceptable; that won't do means it is not good enough.

    intransitive [I]

    Synonyms suffice (suffice is formal)

  3. manage or progressmake progress or manage in a particular way

    Usually with an adverb such as well or badly. It asks or says how successful someone or something is: how are you doing, the business is doing well.

    intransitive [I]

  4. in place of a verbused in place of a verb already mentioned, so that it need not be repeated

    The pro-verb do. It stands for a whole verb phrase to avoid saying it again: she runs faster than I do (than I run). It is common after than, as, and so, and in short answers.

  5. questions and negativesused with the base form of another verb to make questions and negative sentences in the simple present and simple past

    This is the auxiliary do. Ordinary verbs need it to form questions and negatives: do you know, she doesn't like it, did they go, we didn't wait. After does and did, the main verb stays in its base form: does she like, not does she likes.

  6. for emphasisused with the base form of another verb to make a statement or a request stronger

    Stressed do adds force: I do like it (really), do sit down (please). It is also used to contradict: you didn't call. I did call! In writing, the word carries the emphasis without a special mark.

Phrases

that will do

used to tell someone to stop, because they have done or said enough

Said firmly, often to a child or to stop bad behavior.

could do with something informal

need or want something

An informal, indirect way to say that you need or would like something.

how do you do formalold-fashioned

used as a formal greeting when you meet someone for the first time

A set greeting, not a real question. The usual reply is How do you do in return.

Word family

  • doer
  • overdo
  • redo
  • undo

Choosing between do · make

Do is used for actions, tasks, and work in general, and for an activity that is not named exactly: do the dishes, do your homework, do something. Make is used when you create or produce a thing or a result: make a cake, make a plan, make a mistake. Learners meet this choice often, so it is worth learning common pairs by heart.

Usage

Do is also the helper for short answers, question tags, and agreement: Do you like it? Yes, I do. You know Sam, don't you? So do I. When do is both helper and main verb, it appears twice: What do you do? (meaning what is your job).

Common mistakes

I must make my homework. I must do my homework.
Use do for tasks and work; make is for creating or producing something.
I no like it. I don't like it.
Negatives of ordinary verbs in the present and past need the helper do.
Does she likes coffee? Does she like coffee?
After does or did, the main verb stays in its base form.

See also make

For translators

Meaning across languages English uses do both for performing an action and as an empty helper in questions and negatives. Many languages have no such helper and form questions by word order or a small particle, so auxiliary do has no direct translation.
Grammar trap In the simple present and past, ordinary verbs form questions and negatives with do, does, or did plus the base form: does she like it, they did not go. The main verb do can take this helper too: what do you do.