
Verbe régulier : vary -  varied - varied
Traduction française : varier - varier 
Forme simple | Forme en V-ing | 
| I must vary you must vary he must vary we must vary you must vary they must vary  | I must be varying you must be varying he must be varying we must be varying you must be varying they must be varying  | 
Perfect | Perfect en V-ing | 
| I must have varied you must have varied he must have varied we must have varied you must have varied they must have varied  | I must have been varying you must have been varying he must have been varying we must have been varying you must have been varying they must have been varying  | 
Forme simple | Forme en V-ing | 
| I mustn't vary you mustn't vary he mustn't vary we mustn't vary you mustn't vary they mustn't vary  | I mustn't be varying you mustn't be varying he mustn't be varying we mustn't be varying you mustn't be varying they mustn't be varying  | 
Perfect | Perfect en V-ing | 
| I mustn't have varied you mustn't have varied he mustn't have varied we mustn't have varied you mustn't have varied they mustn't have varied  | I mustn't have been varying you mustn't have been varying he mustn't have been varying we mustn't have been varying you mustn't have been varying they mustn't have been varying  | 
Forme simple | Forme en V-ing | 
| must I vary? must you vary? must he vary? must we vary? must you vary? must they vary?  | must I be varying? must you be varying? must he be varying? must we be varying? must you be varying? must they be varying?  | 
Perfect | Perfect en V-ing | 
| must I have varied? must you have varied? must he have varied? must we have varied? must you have varied? must they have varied?  | must I have been varying? must you have been varying? must he have been varying? must we have been varying? must you have been varying? must they have been varying?  | 
Forme simple | Forme en V-ing | 
| mustn't I vary? mustn't you vary? mustn't he vary? mustn't we vary? mustn't you vary? mustn't they vary?  | mustn't I be varying? mustn't you be varying? mustn't he be varying? mustn't we be varying? mustn't you be varying? mustn't they be varying?  | 
Perfect | Perfect en V-ing | 
| mustn't I have varied? mustn't you have varied? mustn't he have varied? mustn't we have varied? mustn't you have varied? mustn't they have varied?  | mustn't I have been varying? mustn't you have been varying? mustn't he have been varying? mustn't we have been varying? mustn't you have been varying? mustn't they have been varying?  |