Present participle; Past participle - swapping - swapped Present - swap - swap - swaps - swap - swap - swap Past - swapped - swapped - swapped - swapped - swapped - swapped Future - will swap - will swap - will swap - will swap - will swap - will swap Present conditional - would swap - would swap - would swap - would swap - would swap - would swap Present Perfect - have swapped - have swapped - has swapped - have swapped - have swapped - have swapped Past Perfect - had swapped - had swapped - had swapped - had swapped - had swapped - had swapped Future Perfect - will have swapped - will have swapped - will have swapped - will have swapped - will have swapped - will have swapped Past conditional - would have swapped - would have swapped - would have swapped - would have swapped - would have swapped - would have swapped Imperative - - - swap - - - - - - - -