Regular verb: establish - established - established
Affirmation
Simple form
I must establish you must establish he must establish we must establish you must establish they must establish
V-ing form
I must be establishing you must be establishing he must be establishing we must be establishing you must be establishing they must be establishing
Perfect
I must have established you must have established he must have established we must have established you must have established they must have established
V-ing perfect
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
Negation
Simple form
I mustn't establish you mustn't establish he mustn't establish we mustn't establish you mustn't establish they mustn't establish
V-ing form
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
Perfect
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
V-ing perfect
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
Interrogative form
Simple form
must I establish? must you establish? must he establish? must we establish? must you establish? must they establish?
V-ing form
must I be establishing? must you be establishing? must he be establishing? must we be establishing? must you be establishing? must they be establishing?
Perfect
must I have established? must you have established? must he have established? must we have established? must you have established? must they have established?
V-ing perfect
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?
Interro-negative form
Simple form
mustn't I establish? mustn't you establish? mustn't he establish? mustn't we establish? mustn't you establish? mustn't they establish?
V-ing form
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?
Perfect
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?
V-ing perfect
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?