Present participle; Past participle - frothing - frothed Present - froth - froth - froths - froth - froth - froth Past - frothed - frothed - frothed - frothed - frothed - frothed Future - will froth - will froth - will froth - will froth - will froth - will froth Present conditional - would froth - would froth - would froth - would froth - would froth - would froth Present Perfect - have frothed - have frothed - has frothed - have frothed - have frothed - have frothed Past Perfect - had frothed - had frothed - had frothed - had frothed - had frothed - had frothed Future Perfect - will have frothed - will have frothed - will have frothed - will have frothed - will have frothed - will have frothed Past conditional - would have frothed - would have frothed - would have frothed - would have frothed - would have frothed - would have frothed Imperative - - - froth - - - - - - - -