English verb conjugation
MUST PREWARM

Regular verb: prewarm - prewarmed - prewarmed

Affirmation

Simple form	V-ing form
I must prewarm you must prewarm he must prewarm we must prewarm you must prewarm they must prewarm	I must be prewarming you must be prewarming he must be prewarming we must be prewarming you must be prewarming they must be prewarming
Perfect	V-ing perfect
I must have prewarmed you must have prewarmed he must have prewarmed we must have prewarmed you must have prewarmed they must have prewarmed	I must have been prewarming you must have been prewarming he must have been prewarming we must have been prewarming you must have been prewarming they must have been prewarming

Negation

Simple form	V-ing form
I must not prewarm you must not prewarm he must not prewarm we must not prewarm you must not prewarm they must not prewarm	I must not be prewarming you must not be prewarming he must not be prewarming we must not be prewarming you must not be prewarming they must not be prewarming
Perfect	V-ing perfect
I must not have prewarmed you must not have prewarmed he must not have prewarmed we must not have prewarmed you must not have prewarmed they must not have prewarmed	I must not have been prewarming you must not have been prewarming he must not have been prewarming we must not have been prewarming you must not have been prewarming they must not have been prewarming

Interrogative form

Simple form	V-ing form
must I prewarm? must you prewarm? must he prewarm? must we prewarm? must you prewarm? must they prewarm?	must I be prewarming? must you be prewarming? must he be prewarming? must we be prewarming? must you be prewarming? must they be prewarming?
Perfect	V-ing perfect
must I have prewarmed? must you have prewarmed? must he have prewarmed? must we have prewarmed? must you have prewarmed? must they have prewarmed?	must I have been prewarming? must you have been prewarming? must he have been prewarming? must we have been prewarming? must you have been prewarming? must they have been prewarming?

Interro-negative form

Simple form	V-ing form
must I not prewarm? must you not prewarm? must he not prewarm? must we not prewarm? must you not prewarm? must they not prewarm?	must I not be prewarming? must you not be prewarming? must he not be prewarming? must we not be prewarming? must you not be prewarming? must they not be prewarming?
Perfect	V-ing perfect
must I not have prewarmed? must you not have prewarmed? must he not have prewarmed? must we not have prewarmed? must you not have prewarmed? must they not have prewarmed?	must I not have been prewarming? must you not have been prewarming? must he not have been prewarming? must we not have been prewarming? must you not have been prewarming? must they not have been prewarming?