
Regular verb: undertain - undertained - undertained
Simple form | V-ing form | 
| I'd undertain you'd undertain he'd undertain we'd undertain you'd undertain they'd undertain  | I'd be undertaining you'd be undertaining he'd be undertaining we'd be undertaining you'd be undertaining they'd be undertaining  | 
Perfect | V-ing perfect | 
| I would've undertained you would've undertained he would've undertained we would've undertained you would've undertained they would've undertained  | I would've been undertaining you would've been undertaining he would've been undertaining we would've been undertaining you would've been undertaining they would've been undertaining  | 
Simple form | V-ing form | 
| I wouldn't undertain you wouldn't undertain he wouldn't undertain we wouldn't undertain you wouldn't undertain they wouldn't undertain  | I wouldn't be undertaining you wouldn't be undertaining he wouldn't be undertaining we wouldn't be undertaining you wouldn't be undertaining they wouldn't be undertaining  | 
Perfect | V-ing perfect | 
| I wouldn't have undertained you wouldn't have undertained he wouldn't have undertained we wouldn't have undertained you wouldn't have undertained they wouldn't have undertained  | I wouldn't have been undertaining you wouldn't have been undertaining he wouldn't have been undertaining we wouldn't have been undertaining you wouldn't have been undertaining they wouldn't have been undertaining  | 
Simple form | V-ing form | 
| would I undertain? would you undertain? would he undertain? would we undertain? would you undertain? would they undertain?  | would I be undertaining? would you be undertaining? would he be undertaining? would we be undertaining? would you be undertaining? would they be undertaining?  | 
Perfect | V-ing perfect | 
| would I have undertained? would you have undertained? would he have undertained? would we have undertained? would you have undertained? would they have undertained?  | would I have been undertaining? would you have been undertaining? would he have been undertaining? would we have been undertaining? would you have been undertaining? would they have been undertaining?  | 
Simple form | V-ing form | 
| wouldn't I undertain? wouldn't you undertain? wouldn't he undertain? wouldn't we undertain? wouldn't you undertain? wouldn't they undertain?  | wouldn't I be undertaining? wouldn't you be undertaining? wouldn't he be undertaining? wouldn't we be undertaining? wouldn't you be undertaining? wouldn't they be undertaining?  | 
Perfect | V-ing perfect | 
| wouldn't I have undertained? wouldn't you have undertained? wouldn't he have undertained? wouldn't we have undertained? wouldn't you have undertained? wouldn't they have undertained?  | wouldn't I have been undertaining? wouldn't you have been undertaining? wouldn't he have been undertaining? wouldn't we have been undertaining? wouldn't you have been undertaining? wouldn't they have been undertaining?  |