
Regelmäßiges Verb: vary - varied - varied
Einfache Form | Form mit V-ing | 
| I could vary you could vary he could vary we could vary you could vary they could vary  | I could be varying you could be varying he could be varying we could be varying you could be varying they could be varying  | 
Perfekt | Perfekt mit V-ing | 
| I could have varied you could have varied he could have varied we could have varied you could have varied they could have varied  | I could have been varying you could have been varying he could have been varying we could have been varying you could have been varying they could have been varying  | 
Einfache Form | Form mit V-ing | 
| I couldn't vary you couldn't vary he couldn't vary we couldn't vary you couldn't vary they couldn't vary  | I couldn't be varying you couldn't be varying he couldn't be varying we couldn't be varying you couldn't be varying they couldn't be varying  | 
Perfekt | Perfekt mit V-ing | 
| I couldn't have varied you couldn't have varied he couldn't have varied we couldn't have varied you couldn't have varied they couldn't have varied  | I couldn't have been varying you couldn't have been varying he couldn't have been varying we couldn't have been varying you couldn't have been varying they couldn't have been varying  | 
Einfache Form | Form mit V-ing | 
| could I vary? could you vary? could he vary? could we vary? could you vary? could they vary?  | could I be varying? could you be varying? could he be varying? could we be varying? could you be varying? could they be varying?  | 
Perfekt | Perfekt mit V-ing | 
| could I have varied? could you have varied? could he have varied? could we have varied? could you have varied? could they have varied?  | could I have been varying? could you have been varying? could he have been varying? could we have been varying? could you have been varying? could they have been varying?  | 
Einfache Form | Form mit V-ing | 
| couldn't I vary? couldn't you vary? couldn't he vary? couldn't we vary? couldn't you vary? couldn't they vary?  | couldn't I be varying? couldn't you be varying? couldn't he be varying? couldn't we be varying? couldn't you be varying? couldn't they be varying?  | 
Perfekt | Perfekt mit V-ing | 
| couldn't I have varied? couldn't you have varied? couldn't he have varied? couldn't we have varied? couldn't you have varied? couldn't they have varied?  | couldn't I have been varying? couldn't you have been varying? couldn't he have been varying? couldn't we have been varying? couldn't you have been varying? couldn't they have been varying?  |