Present participle; Past participle - fattening - fattened Present - fatten - fatten - fattens - fatten - fatten - fatten Past - fattened - fattened - fattened - fattened - fattened - fattened Future - will fatten - will fatten - will fatten - will fatten - will fatten - will fatten Present conditional - would fatten - would fatten - would fatten - would fatten - would fatten - would fatten Present Perfect - have fattened - have fattened - has fattened - have fattened - have fattened - have fattened Past Perfect - had fattened - had fattened - had fattened - had fattened - had fattened - had fattened Future Perfect - will have fattened - will have fattened - will have fattened - will have fattened - will have fattened - will have fattened Past conditional - would have fattened - would have fattened - would have fattened - would have fattened - would have fattened - would have fattened Imperative - - - fatten - - - - - - - -