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 mustn't curve you mustn't curve he mustn't curve we mustn't curve you mustn't curve they mustn't curve	I mustn't be curving you mustn't be curving he mustn't be curving we mustn't be curving you mustn't be curving they mustn't be curving
Perfect	V-ing perfect
I mustn't have curved you mustn't have curved he mustn't have curved we mustn't have curved you mustn't have curved they mustn't have curved	I mustn't have been curving you mustn't have been curving he mustn't have been curving we mustn't have been curving you mustn't have been curving they mustn't 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
mustn't I curve? mustn't you curve? mustn't he curve? mustn't we curve? mustn't you curve? mustn't they curve?	mustn't I be curving? mustn't you be curving? mustn't he be curving? mustn't we be curving? mustn't you be curving? mustn't they be curving?
Perfect	V-ing perfect
mustn't I have curved? mustn't you have curved? mustn't he have curved? mustn't we have curved? mustn't you have curved? mustn't they have curved?	mustn't I have been curving? mustn't you have been curving? mustn't he have been curving? mustn't we have been curving? mustn't you have been curving? mustn't they have been curving?