English verb conjugation
MUST HEAT

Regular verb: heat - heated - heated

Affirmation

Simple form	V-ing form
I must heat you must heat she must heat we must heat you must heat they must heat	I must be heating you must be heating she must be heating we must be heating you must be heating they must be heating
Perfect	V-ing perfect
I must have heated you must have heated she must have heated we must have heated you must have heated they must have heated	I must have been heating you must have been heating she must have been heating we must have been heating you must have been heating they must have been heating

Negation

Simple form	V-ing form
I must not heat you must not heat she must not heat we must not heat you must not heat they must not heat	I must not be heating you must not be heating she must not be heating we must not be heating you must not be heating they must not be heating
Perfect	V-ing perfect
I must not have heated you must not have heated she must not have heated we must not have heated you must not have heated they must not have heated	I must not have been heating you must not have been heating she must not have been heating we must not have been heating you must not have been heating they must not have been heating

Interrogative form

Simple form	V-ing form
must I heat? must you heat? must she heat? must we heat? must you heat? must they heat?	must I be heating? must you be heating? must she be heating? must we be heating? must you be heating? must they be heating?
Perfect	V-ing perfect
must I have heated? must you have heated? must she have heated? must we have heated? must you have heated? must they have heated?	must I have been heating? must you have been heating? must she have been heating? must we have been heating? must you have been heating? must they have been heating?

Interro-negative form

Simple form	V-ing form
must I not heat? must you not heat? must she not heat? must we not heat? must you not heat? must they not heat?	must I not be heating? must you not be heating? must she not be heating? must we not be heating? must you not be heating? must they not be heating?
Perfect	V-ing perfect
must I not have heated? must you not have heated? must she not have heated? must we not have heated? must you not have heated? must they not have heated?	must I not have been heating? must you not have been heating? must she not have been heating? must we not have been heating? must you not have been heating? must they not have been heating?