
Verbo regular: establish - established - established
Forma simple | Forma con V-ing | 
| I must establish you must establish he must establish we must establish you must establish they must establish  | I must be establishing you must be establishing he must be establishing we must be establishing you must be establishing they must be establishing  | 
Perfecto | Perfecto con V-ing | 
| I must have established you must have established he must have established we must have established you must have established they must have established  | I must have been establishing you must have been establishing he must have been establishing we must have been establishing you must have been establishing they must have been establishing  | 
Forma simple | Forma con V-ing | 
| I mustn't establish you mustn't establish he mustn't establish we mustn't establish you mustn't establish they mustn't establish  | I mustn't be establishing you mustn't be establishing he mustn't be establishing we mustn't be establishing you mustn't be establishing they mustn't be establishing  | 
Perfecto | Perfecto con V-ing | 
| I mustn't have established you mustn't have established he mustn't have established we mustn't have established you mustn't have established they mustn't have established  | I mustn't have been establishing you mustn't have been establishing he mustn't have been establishing we mustn't have been establishing you mustn't have been establishing they mustn't have been establishing  | 
Forma simple | Forma con V-ing | 
| must I establish? must you establish? must he establish? must we establish? must you establish? must they establish?  | must I be establishing? must you be establishing? must he be establishing? must we be establishing? must you be establishing? must they be establishing?  | 
Perfecto | Perfecto con V-ing | 
| must I have established? must you have established? must he have established? must we have established? must you have established? must they have established?  | must I have been establishing? must you have been establishing? must he have been establishing? must we have been establishing? must you have been establishing? must they have been establishing?  | 
Forma simple | Forma con V-ing | 
| mustn't I establish? mustn't you establish? mustn't he establish? mustn't we establish? mustn't you establish? mustn't they establish?  | mustn't I be establishing? mustn't you be establishing? mustn't he be establishing? mustn't we be establishing? mustn't you be establishing? mustn't they be establishing?  | 
Perfecto | Perfecto con V-ing | 
| mustn't I have established? mustn't you have established? mustn't he have established? mustn't we have established? mustn't you have established? mustn't they have established?  | mustn't I have been establishing? mustn't you have been establishing? mustn't he have been establishing? mustn't we have been establishing? mustn't you have been establishing? mustn't they have been establishing?  |