perform (an action, the precise nature of which is often unspecified)

very little work has been done in this field

she knew what she was doing

something must be done about the city's traffic

what can I do for you?

what a lot there is to do!

Brian was looking at the girl, and had been doing so for most of the hearing

achieve or complete

I never really got the chance to finish school or do my exams

act or behave in a specified way

they are free to do as they please

you did well to bring her back

be suitable or acceptable

if he's anything like you, he'll do

a couple of quid'll do me

beat up or kill

one day I'll do him

used before a verb (except be, can, may, ought, shall, will) in questions and negative statements

do you have any pets?

did he see me?

I don't smoke

it does not matter

used to refer back to a verb already mentioned

he looks better than he did before

you wanted to enjoy yourself, and you did

as they get smarter, so do the crooks

I paid for my two tickets on the train and did so without complaint

used to give emphasis to a positive verb

I do want to act on this

he did look tired

used with inversion of a subject and verb when an adverbial phrase begins a clause for emphasis

only rarely did they succumb

not only did the play close, the theatre closed

a party or other social event

the soccer club Christmas do

a bowl-shaped do of perfect silky hair

excrement

the air was rancid with the smell of donkey doo

they'll be the first to come begging for help when the do hits the fan

a swindle or hoax

the activities in which a particular person engages

the latest doings of television stars

used to refer to things when one has forgotten their name or when no one word easily covers them

the drawer where he kept the doings

a beating or scolding

someone had given her a doing