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
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
achieve or complete
I never really got the chance to finish school or do my exams
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
act or behave in a specified way
they are free to do as they please
you did well to bring her back
used to give emphasis to a positive verb
I do want to act on this
he did look tired
be suitable or acceptable
if he's anything like you, he'll do
a couple of quid'll do me
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
beat up or kill
one day I'll do him