do

strong /duː/

weak /də/ auxiliary verb (doing, did, done)

Definition

A1 used with another verb to form questions and negative phrases: Do you need any help? I don’t know.

A2 used at the end of a sentence to make it into a question: Sarah lives near here, doesn’t she?

B1 used to avoid repeating a verb that has just been used: ‘I hate that song.’ ‘So do I.’

› used to make the main verb stronger: He does like you – he’s just shy.

(Definition of do auxiliary verb from the Cambridge Essential Dictionary © Cambridge University Press)

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