English verb conjugation
SHOULD CURVE

Regular verb: curve - curved - curved

Affirmation

Simple form	V-ing form
I'd curve you'd curve he'd curve we'd curve you'd curve they'd curve	I'd be curving you'd be curving he'd be curving we'd be curving you'd be curving they'd be curving
Perfect	V-ing perfect
I should've curved you should've curved he should've curved we should've curved you should've curved they should've curved	I should've been curving you should've been curving he should've been curving we should've been curving you should've been curving they should've been curving

Negation

Simple form	V-ing form
I shouldn't curve you shouldn't curve he shouldn't curve we shouldn't curve you shouldn't curve they shouldn't curve	I shouldn't be curving you shouldn't be curving he shouldn't be curving we shouldn't be curving you shouldn't be curving they shouldn't be curving
Perfect	V-ing perfect
I shouldn't have curved you shouldn't have curved he shouldn't have curved we shouldn't have curved you shouldn't have curved they shouldn't have curved	I shouldn't have been curving you shouldn't have been curving he shouldn't have been curving we shouldn't have been curving you shouldn't have been curving they shouldn't have been curving

Interrogative form

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

Interro-negative form

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