Present participle; Past participle - contending - contended Present - contend - contend - contends - contend - contend - contend Past - contended - contended - contended - contended - contended - contended Future - will contend - will contend - will contend - will contend - will contend - will contend Present conditional - would contend - would contend - would contend - would contend - would contend - would contend Present Perfect - have contended - have contended - has contended - have contended - have contended - have contended Past Perfect - had contended - had contended - had contended - had contended - had contended - had contended Future Perfect - will have contended - will have contended - will have contended - will have contended - will have contended - will have contended Past conditional - would have contended - would have contended - would have contended - would have contended - would have contended - would have contended Imperative - - - contend - - - - - - - -