
Verbo regular: tire - tired - tired
Forma simple | Forma con V-ing | 
| I must tire you must tire she must tire we must tire you must tire they must tire  | I must be tiring you must be tiring she must be tiring we must be tiring you must be tiring they must be tiring  | 
Perfecto | Perfecto con V-ing | 
| I must have tired you must have tired she must have tired we must have tired you must have tired they must have tired  | I must have been tiring you must have been tiring she must have been tiring we must have been tiring you must have been tiring they must have been tiring  | 
Forma simple | Forma con V-ing | 
| I mustn't tire you mustn't tire she mustn't tire we mustn't tire you mustn't tire they mustn't tire  | I mustn't be tiring you mustn't be tiring she mustn't be tiring we mustn't be tiring you mustn't be tiring they mustn't be tiring  | 
Perfecto | Perfecto con V-ing | 
| I mustn't have tired you mustn't have tired she mustn't have tired we mustn't have tired you mustn't have tired they mustn't have tired  | I mustn't have been tiring you mustn't have been tiring she mustn't have been tiring we mustn't have been tiring you mustn't have been tiring they mustn't have been tiring  | 
Forma simple | Forma con V-ing | 
| must I tire? must you tire? must she tire? must we tire? must you tire? must they tire?  | must I be tiring? must you be tiring? must she be tiring? must we be tiring? must you be tiring? must they be tiring?  | 
Perfecto | Perfecto con V-ing | 
| must I have tired? must you have tired? must she have tired? must we have tired? must you have tired? must they have tired?  | must I have been tiring? must you have been tiring? must she have been tiring? must we have been tiring? must you have been tiring? must they have been tiring?  | 
Forma simple | Forma con V-ing | 
| mustn't I tire? mustn't you tire? mustn't she tire? mustn't we tire? mustn't you tire? mustn't they tire?  | mustn't I be tiring? mustn't you be tiring? mustn't she be tiring? mustn't we be tiring? mustn't you be tiring? mustn't they be tiring?  | 
Perfecto | Perfecto con V-ing | 
| mustn't I have tired? mustn't you have tired? mustn't she have tired? mustn't we have tired? mustn't you have tired? mustn't they have tired?  | mustn't I have been tiring? mustn't you have been tiring? mustn't she have been tiring? mustn't we have been tiring? mustn't you have been tiring? mustn't they have been tiring?  |