Present participle; Past participle - interchanging - interchanged Present - interchange - interchange - interchanges - interchange - interchange - interchange Past - interchanged - interchanged - interchanged - interchanged - interchanged - interchanged Future - will interchange - will interchange - will interchange - will interchange - will interchange - will interchange Present conditional - would interchange - would interchange - would interchange - would interchange - would interchange - would interchange Present Perfect - have interchanged - have interchanged - has interchanged - have interchanged - have interchanged - have interchanged Past Perfect - had interchanged - had interchanged - had interchanged - had interchanged - had interchanged - had interchanged Future Perfect - will have interchanged - will have interchanged - will have interchanged - will have interchanged - will have interchanged - will have interchanged Past conditional - would have interchanged - would have interchanged - would have interchanged - would have interchanged - would have interchanged - would have interchanged Imperative - - - interchange - - - - - - - -