auxiliary verb “do”
 do, neg. don't, he does, neg. doesn't, past did, neg. didn't
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 Do you like ice cream? 
- puts the following verb into the negative I do not want to leave early. 
- used to give emphasis to a statement I really do appreciate your help. 
- replaces a verb mentioned earlier to avoid repetition She likes to swim, and I do too. 
verb “do”
 infinitive do; he does; past tense did; past part. done; ger. doing
- to carry out an action If you want something done, do it yourself. 
- to be in a place for a specific reason What are you doing here so late? 
- to be sufficient or adequate This old chair will do for now. 
- to cause a particular result or effect A good night's sleep did me a lot of good. 
- to fare or perform How's your new job doing? 
- to have a particular job What do you do for a living? 
- to serve a sentence in prison He did two years for burglary. 
- to mimic, portray or impersonate He does a really great George Bush. 
- to engage in sexual activity They went upstairs to do it. 
- to produce or offer a service or product This bakery doesn't do wedding cakes. 
- to consume drugs He got caught doing drugs. 
noun “do”
 singular do, plural dos, doos or uncountable
- a social event or gathering Are you going to their do this weekend? 
noun “do”
- the musical note that starts and ends the scale in solfège In the song, the melody starts with 'do'.