Present participle; Past participle - grassing - grassed Present - grass - grass - grasses - grass - grass - grass Past - grassed - grassed - grassed - grassed - grassed - grassed Future - will grass - will grass - will grass - will grass - will grass - will grass Present conditional - would grass - would grass - would grass - would grass - would grass - would grass Present Perfect - have grassed - have grassed - has grassed - have grassed - have grassed - have grassed Past Perfect - had grassed - had grassed - had grassed - had grassed - had grassed - had grassed Future Perfect - will have grassed - will have grassed - will have grassed - will have grassed - will have grassed - will have grassed Past conditional - would have grassed - would have grassed - would have grassed - would have grassed - would have grassed - would have grassed Imperative - - - grass - - - - - - - -