Present participle; Past participle - extemporizing - extemporized Present - extemporize - extemporize - extemporizes - extemporize - extemporize - extemporize Past - extemporized - extemporized - extemporized - extemporized - extemporized - extemporized Future - will extemporize - will extemporize - will extemporize - will extemporize - will extemporize - will extemporize Present conditional - would extemporize - would extemporize - would extemporize - would extemporize - would extemporize - would extemporize Present Perfect - have extemporized - have extemporized - has extemporized - have extemporized - have extemporized - have extemporized Past Perfect - had extemporized - had extemporized - had extemporized - had extemporized - had extemporized - had extemporized Future Perfect - will have extemporized - will have extemporized - will have extemporized - will have extemporized - will have extemporized - will have extemporized Past conditional - would have extemporized - would have extemporized - would have extemporized - would have extemporized - would have extemporized - would have extemporized Imperative - - - extemporize - - - - - - - -