English verb conjugation
SHOULD STAB

Regular verb: stab - stabbed - stabbed

Affirmation

Simple form	V-ing form
I'd stab you'd stab he'd stab we'd stab you'd stab they'd stab	I'd be stabbing you'd be stabbing he'd be stabbing we'd be stabbing you'd be stabbing they'd be stabbing
Perfect	V-ing perfect
I should've stabbed you should've stabbed he should've stabbed we should've stabbed you should've stabbed they should've stabbed	I should've been stabbing you should've been stabbing he should've been stabbing we should've been stabbing you should've been stabbing they should've been stabbing

Negation

Simple form	V-ing form
I shouldn't stab you shouldn't stab he shouldn't stab we shouldn't stab you shouldn't stab they shouldn't stab	I shouldn't be stabbing you shouldn't be stabbing he shouldn't be stabbing we shouldn't be stabbing you shouldn't be stabbing they shouldn't be stabbing
Perfect	V-ing perfect
I shouldn't have stabbed you shouldn't have stabbed he shouldn't have stabbed we shouldn't have stabbed you shouldn't have stabbed they shouldn't have stabbed	I shouldn't have been stabbing you shouldn't have been stabbing he shouldn't have been stabbing we shouldn't have been stabbing you shouldn't have been stabbing they shouldn't have been stabbing

Interrogative form

Simple form	V-ing form
should I stab? should you stab? should he stab? should we stab? should you stab? should they stab?	should I be stabbing? should you be stabbing? should he be stabbing? should we be stabbing? should you be stabbing? should they be stabbing?
Perfect	V-ing perfect
should I have stabbed? should you have stabbed? should he have stabbed? should we have stabbed? should you have stabbed? should they have stabbed?	should I have been stabbing? should you have been stabbing? should he have been stabbing? should we have been stabbing? should you have been stabbing? should they have been stabbing?

Interro-negative form

Simple form	V-ing form
shouldn't I stab? shouldn't you stab? shouldn't he stab? shouldn't we stab? shouldn't you stab? shouldn't they stab?	shouldn't I be stabbing? shouldn't you be stabbing? shouldn't he be stabbing? shouldn't we be stabbing? shouldn't you be stabbing? shouldn't they be stabbing?
Perfect	V-ing perfect
shouldn't I have stabbed? shouldn't you have stabbed? shouldn't he have stabbed? shouldn't we have stabbed? shouldn't you have stabbed? shouldn't they have stabbed?	shouldn't I have been stabbing? shouldn't you have been stabbing? shouldn't he have been stabbing? shouldn't we have been stabbing? shouldn't you have been stabbing? shouldn't they have been stabbing?