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 must not prewarn you must not prewarn he must not prewarn we must not prewarn you must not prewarn they must not prewarn	I must not be prewarning you must not be prewarning he must not be prewarning we must not be prewarning you must not be prewarning they must not be prewarning
Perfect	V-ing perfect
I must not have prewarned you must not have prewarned he must not have prewarned we must not have prewarned you must not have prewarned they must not have prewarned	I must not have been prewarning you must not have been prewarning he must not have been prewarning we must not have been prewarning you must not have been prewarning they must not 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
must I not prewarn? must you not prewarn? must he not prewarn? must we not prewarn? must you not prewarn? must they not prewarn?	must I not be prewarning? must you not be prewarning? must he not be prewarning? must we not be prewarning? must you not be prewarning? must they not be prewarning?
Perfect	V-ing perfect
must I not have prewarned? must you not have prewarned? must he not have prewarned? must we not have prewarned? must you not have prewarned? must they not have prewarned?	must I not have been prewarning? must you not have been prewarning? must he not have been prewarning? must we not have been prewarning? must you not have been prewarning? must they not have been prewarning?