Present participle; Past participle - uniting - united Present - unite - unite - unites - unite - unite - unite Past - united - united - united - united - united - united Future - will unite - will unite - will unite - will unite - will unite - will unite Present conditional - would unite - would unite - would unite - would unite - would unite - would unite Present Perfect - have united - have united - has united - have united - have united - have united Past Perfect - had united - had united - had united - had united - had united - had united Future Perfect - will have united - will have united - will have united - will have united - will have united - will have united Past conditional - would have united - would have united - would have united - would have united - would have united - would have united Imperative - - - unite - - - - - - - -