Present participle; Past participle - straining - strained Present - strain - strain - strains - strain - strain - strain Past - strained - strained - strained - strained - strained - strained Future - will strain - will strain - will strain - will strain - will strain - will strain Present conditional - would strain - would strain - would strain - would strain - would strain - would strain Present Perfect - have strained - have strained - has strained - have strained - have strained - have strained Past Perfect - had strained - had strained - had strained - had strained - had strained - had strained Future Perfect - will have strained - will have strained - will have strained - will have strained - will have strained - will have strained Past conditional - would have strained - would have strained - would have strained - would have strained - would have strained - would have strained Imperative - - - strain - - - - - - - -