Present participle; Past participle - undertaking - undertaken Present - undertake - undertake - undertakes - undertake - undertake - undertake Past - undertook - undertook - undertook - undertook - undertook - undertook Future - will undertake - will undertake - will undertake - will undertake - will undertake - will undertake Present conditional - would undertake - would undertake - would undertake - would undertake - would undertake - would undertake Present Perfect - have undertaken - have undertaken - has undertaken - have undertaken - have undertaken - have undertaken Past Perfect - had undertaken - had undertaken - had undertaken - had undertaken - had undertaken - had undertaken Future Perfect - will have undertaken - will have undertaken - will have undertaken - will have undertaken - will have undertaken - will have undertaken Past conditional - would have undertaken - would have undertaken - would have undertaken - would have undertaken - would have undertaken - would have undertaken Imperative - - - undertake - - - - - - - -