Oxford Advanced American Dictionary

Definition of have auxiliary verb from the Oxford Advanced Learner's Dictionary

 Oxford3000

have

auxiliary verb
have pronunciation English həv have pronunciation American həv
have pronunciation English əv have pronunciation American əv
have pronunciation English hæv strong form have pronunciation American hæv
 
used with the past participle to form perfect tensesI've finished my work.He's gone home, hasn't he?‘Have you seen it? ’ ‘Yes, I have/No, I haven't.’She'll have had the results by now.Had they left before you got there?If I hadn't seen it with my own eyes I wouldn't have believed it. (formal) Had I known that (= if I had known that) I would never have come.