English verb conjugation
MUST PREWARN

Regular verb: prewarn - prewarned - prewarned

Affirmation

Simple form	V-ing form
I must prewarn you must prewarn he must prewarn we must prewarn you must prewarn they must prewarn	I must be prewarning you must be prewarning he must be prewarning we must be prewarning you must be prewarning they must be prewarning
Perfect	V-ing perfect
I must have prewarned you must have prewarned he must have prewarned we must have prewarned you must have prewarned they must have prewarned	I must have been prewarning you must have been prewarning he must have been prewarning we must have been prewarning you must have been prewarning they must have been prewarning

Negation

Simple form	V-ing form
I mustn't prewarn you mustn't prewarn he mustn't prewarn we mustn't prewarn you mustn't prewarn they mustn't prewarn	I mustn't be prewarning you mustn't be prewarning he mustn't be prewarning we mustn't be prewarning you mustn't be prewarning they mustn't be prewarning
Perfect	V-ing perfect
I mustn't have prewarned you mustn't have prewarned he mustn't have prewarned we mustn't have prewarned you mustn't have prewarned they mustn't have prewarned	I mustn't have been prewarning you mustn't have been prewarning he mustn't have been prewarning we mustn't have been prewarning you mustn't have been prewarning they mustn't have been prewarning

Interrogative form

Simple form	V-ing form
must I prewarn? must you prewarn? must he prewarn? must we prewarn? must you prewarn? must they prewarn?	must I be prewarning? must you be prewarning? must he be prewarning? must we be prewarning? must you be prewarning? must they be prewarning?
Perfect	V-ing perfect
must I have prewarned? must you have prewarned? must he have prewarned? must we have prewarned? must you have prewarned? must they have prewarned?	must I have been prewarning? must you have been prewarning? must he have been prewarning? must we have been prewarning? must you have been prewarning? must they have been prewarning?

Interro-negative form

Simple form	V-ing form
mustn't I prewarn? mustn't you prewarn? mustn't he prewarn? mustn't we prewarn? mustn't you prewarn? mustn't they prewarn?	mustn't I be prewarning? mustn't you be prewarning? mustn't he be prewarning? mustn't we be prewarning? mustn't you be prewarning? mustn't they be prewarning?
Perfect	V-ing perfect
mustn't I have prewarned? mustn't you have prewarned? mustn't he have prewarned? mustn't we have prewarned? mustn't you have prewarned? mustn't they have prewarned?	mustn't I have been prewarning? mustn't you have been prewarning? mustn't he have been prewarning? mustn't we have been prewarning? mustn't you have been prewarning? mustn't they have been prewarning?