Present participle; Past participle - countering - countered Present - counter - counter - counters - counter - counter - counter Past - countered - countered - countered - countered - countered - countered Future - will counter - will counter - will counter - will counter - will counter - will counter Present conditional - would counter - would counter - would counter - would counter - would counter - would counter Present Perfect - have countered - have countered - has countered - have countered - have countered - have countered Past Perfect - had countered - had countered - had countered - had countered - had countered - had countered Future Perfect - will have countered - will have countered - will have countered - will have countered - will have countered - will have countered Past conditional - would have countered - would have countered - would have countered - would have countered - would have countered - would have countered Imperative - - - counter - - - - - - - -