English verb conjugation
SHOULD FUR

Regular verb: fur - furred - furred

Affirmation

Simple form	V-ing form
I'd fur you'd fur he'd fur we'd fur you'd fur they'd fur	I'd be furring you'd be furring he'd be furring we'd be furring you'd be furring they'd be furring
Perfect	V-ing perfect
I should've furred you should've furred he should've furred we should've furred you should've furred they should've furred	I should've been furring you should've been furring he should've been furring we should've been furring you should've been furring they should've been furring

Negation

Simple form	V-ing form
I shouldn't fur you shouldn't fur he shouldn't fur we shouldn't fur you shouldn't fur they shouldn't fur	I shouldn't be furring you shouldn't be furring he shouldn't be furring we shouldn't be furring you shouldn't be furring they shouldn't be furring
Perfect	V-ing perfect
I shouldn't have furred you shouldn't have furred he shouldn't have furred we shouldn't have furred you shouldn't have furred they shouldn't have furred	I shouldn't have been furring you shouldn't have been furring he shouldn't have been furring we shouldn't have been furring you shouldn't have been furring they shouldn't have been furring

Interrogative form

Simple form	V-ing form
should I fur? should you fur? should he fur? should we fur? should you fur? should they fur?	should I be furring? should you be furring? should he be furring? should we be furring? should you be furring? should they be furring?
Perfect	V-ing perfect
should I have furred? should you have furred? should he have furred? should we have furred? should you have furred? should they have furred?	should I have been furring? should you have been furring? should he have been furring? should we have been furring? should you have been furring? should they have been furring?

Interro-negative form

Simple form	V-ing form
shouldn't I fur? shouldn't you fur? shouldn't he fur? shouldn't we fur? shouldn't you fur? shouldn't they fur?	shouldn't I be furring? shouldn't you be furring? shouldn't he be furring? shouldn't we be furring? shouldn't you be furring? shouldn't they be furring?
Perfect	V-ing perfect
shouldn't I have furred? shouldn't you have furred? shouldn't he have furred? shouldn't we have furred? shouldn't you have furred? shouldn't they have furred?	shouldn't I have been furring? shouldn't you have been furring? shouldn't he have been furring? shouldn't we have been furring? shouldn't you have been furring? shouldn't they have been furring?