Present participle; Past participle - grating - grated Present - grate - grate - grates - grate - grate - grate Past - grated - grated - grated - grated - grated - grated Future - will grate - will grate - will grate - will grate - will grate - will grate Present conditional - would grate - would grate - would grate - would grate - would grate - would grate Present Perfect - have grated - have grated - has grated - have grated - have grated - have grated Past Perfect - had grated - had grated - had grated - had grated - had grated - had grated Future Perfect - will have grated - will have grated - will have grated - will have grated - will have grated - will have grated Past conditional - would have grated - would have grated - would have grated - would have grated - would have grated - would have grated Imperative - - - grate - - - - - - - -