
Regular verb: cultivate - cultivated - cultivated
Simple form | V-ing form | 
| I must cultivate you must cultivate he must cultivate we must cultivate you must cultivate they must cultivate  | I must be cultivating you must be cultivating he must be cultivating we must be cultivating you must be cultivating they must be cultivating  | 
Perfect | V-ing perfect | 
| I must have cultivated you must have cultivated he must have cultivated we must have cultivated you must have cultivated they must have cultivated  | I must have been cultivating you must have been cultivating he must have been cultivating we must have been cultivating you must have been cultivating they must have been cultivating  | 
Simple form | V-ing form | 
| I mustn't cultivate you mustn't cultivate he mustn't cultivate we mustn't cultivate you mustn't cultivate they mustn't cultivate  | I mustn't be cultivating you mustn't be cultivating he mustn't be cultivating we mustn't be cultivating you mustn't be cultivating they mustn't be cultivating  | 
Perfect | V-ing perfect | 
| I mustn't have cultivated you mustn't have cultivated he mustn't have cultivated we mustn't have cultivated you mustn't have cultivated they mustn't have cultivated  | I mustn't have been cultivating you mustn't have been cultivating he mustn't have been cultivating we mustn't have been cultivating you mustn't have been cultivating they mustn't have been cultivating  | 
Simple form | V-ing form | 
| must I cultivate? must you cultivate? must he cultivate? must we cultivate? must you cultivate? must they cultivate?  | must I be cultivating? must you be cultivating? must he be cultivating? must we be cultivating? must you be cultivating? must they be cultivating?  | 
Perfect | V-ing perfect | 
| must I have cultivated? must you have cultivated? must he have cultivated? must we have cultivated? must you have cultivated? must they have cultivated?  | must I have been cultivating? must you have been cultivating? must he have been cultivating? must we have been cultivating? must you have been cultivating? must they have been cultivating?  | 
Simple form | V-ing form | 
| mustn't I cultivate? mustn't you cultivate? mustn't he cultivate? mustn't we cultivate? mustn't you cultivate? mustn't they cultivate?  | mustn't I be cultivating? mustn't you be cultivating? mustn't he be cultivating? mustn't we be cultivating? mustn't you be cultivating? mustn't they be cultivating?  | 
Perfect | V-ing perfect | 
| mustn't I have cultivated? mustn't you have cultivated? mustn't he have cultivated? mustn't we have cultivated? mustn't you have cultivated? mustn't they have cultivated?  | mustn't I have been cultivating? mustn't you have been cultivating? mustn't he have been cultivating? mustn't we have been cultivating? mustn't you have been cultivating? mustn't they have been cultivating?  |