Present participle; Past participle - loosening - loosened Present - loosen - loosen - loosens - loosen - loosen - loosen Past - loosened - loosened - loosened - loosened - loosened - loosened Future - will loosen - will loosen - will loosen - will loosen - will loosen - will loosen Present conditional - would loosen - would loosen - would loosen - would loosen - would loosen - would loosen Present Perfect - have loosened - have loosened - has loosened - have loosened - have loosened - have loosened Past Perfect - had loosened - had loosened - had loosened - had loosened - had loosened - had loosened Future Perfect - will have loosened - will have loosened - will have loosened - will have loosened - will have loosened - will have loosened Past conditional - would have loosened - would have loosened - would have loosened - would have loosened - would have loosened - would have loosened Imperative - - - loosen - - - - - - - -