English verb conjugation
MUST CURVE

Regular verb: curve - curved - curved

Affirmation

Simple form	V-ing form
I must curve you must curve he must curve we must curve you must curve they must curve	I must be curving you must be curving he must be curving we must be curving you must be curving they must be curving
Perfect	V-ing perfect
I must have curved you must have curved he must have curved we must have curved you must have curved they must have curved	I must have been curving you must have been curving he must have been curving we must have been curving you must have been curving they must have been curving

Negation

Simple form	V-ing form
I must not curve you must not curve he must not curve we must not curve you must not curve they must not curve	I must not be curving you must not be curving he must not be curving we must not be curving you must not be curving they must not be curving
Perfect	V-ing perfect
I must not have curved you must not have curved he must not have curved we must not have curved you must not have curved they must not have curved	I must not have been curving you must not have been curving he must not have been curving we must not have been curving you must not have been curving they must not have been curving

Interrogative form

Simple form	V-ing form
must I curve? must you curve? must he curve? must we curve? must you curve? must they curve?	must I be curving? must you be curving? must he be curving? must we be curving? must you be curving? must they be curving?
Perfect	V-ing perfect
must I have curved? must you have curved? must he have curved? must we have curved? must you have curved? must they have curved?	must I have been curving? must you have been curving? must he have been curving? must we have been curving? must you have been curving? must they have been curving?

Interro-negative form

Simple form	V-ing form
must I not curve? must you not curve? must he not curve? must we not curve? must you not curve? must they not curve?	must I not be curving? must you not be curving? must he not be curving? must we not be curving? must you not be curving? must they not be curving?
Perfect	V-ing perfect
must I not have curved? must you not have curved? must he not have curved? must we not have curved? must you not have curved? must they not have curved?	must I not have been curving? must you not have been curving? must he not have been curving? must we not have been curving? must you not have been curving? must they not have been curving?