English verb conjugation
MUST ESTABLISH

Regular verb: establish - established - established

Affirmation

Simple form	V-ing form
I must establish you must establish she must establish we must establish you must establish they must establish	I must be establishing you must be establishing she must be establishing we must be establishing you must be establishing they must be establishing
Perfect	V-ing perfect
I must have established you must have established she 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 she must have been establishing we must have been establishing you must have been establishing they must have been establishing

Negation

Simple form	V-ing form
I mustn't establish you mustn't establish she 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 she mustn't be establishing we mustn't be establishing you mustn't be establishing they mustn't be establishing
Perfect	V-ing perfect
I mustn't have established you mustn't have established she 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 she 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	V-ing form
must I establish? must you establish? must she establish? must we establish? must you establish? must they establish?	must I be establishing? must you be establishing? must she be establishing? must we be establishing? must you be establishing? must they be establishing?
Perfect	V-ing perfect
must I have established? must you have established? must she 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 she have been establishing? must we have been establishing? must you have been establishing? must they have been establishing?

Interro-negative form

Simple form	V-ing form
mustn't I establish? mustn't you establish? mustn't she 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 she be establishing? mustn't we be establishing? mustn't you be establishing? mustn't they be establishing?
Perfect	V-ing perfect
mustn't I have established? mustn't you have established? mustn't she 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 she have been establishing? mustn't we have been establishing? mustn't you have been establishing? mustn't they have been establishing?