Present participle; Past participle - decaying - decayed Present - decay - decay - decays - decay - decay - decay Past - decayed - decayed - decayed - decayed - decayed - decayed Future - will decay - will decay - will decay - will decay - will decay - will decay Present conditional - would decay - would decay - would decay - would decay - would decay - would decay Present Perfect - have decayed - have decayed - has decayed - have decayed - have decayed - have decayed Past Perfect - had decayed - had decayed - had decayed - had decayed - had decayed - had decayed Future Perfect - will have decayed - will have decayed - will have decayed - will have decayed - will have decayed - will have decayed Past conditional - would have decayed - would have decayed - would have decayed - would have decayed - would have decayed - would have decayed Imperative - - - decay - - - - - - - -