Present participle; Past participle - percolating - percolated Present - percolate - percolate - percolates - percolate - percolate - percolate Past - percolated - percolated - percolated - percolated - percolated - percolated Future - will percolate - will percolate - will percolate - will percolate - will percolate - will percolate Present conditional - would percolate - would percolate - would percolate - would percolate - would percolate - would percolate Present Perfect - have percolated - have percolated - has percolated - have percolated - have percolated - have percolated Past Perfect - had percolated - had percolated - had percolated - had percolated - had percolated - had percolated Future Perfect - will have percolated - will have percolated - will have percolated - will have percolated - will have percolated - will have percolated Past conditional - would have percolated - would have percolated - would have percolated - would have percolated - would have percolated - would have percolated Imperative - - - percolate - - - - - - - -