English verb conjugation
SHOULD SPRAIN

Regular verb: sprain - sprained - sprained

Affirmation

Simple form	V-ing form
I'd sprain you'd sprain he'd sprain we'd sprain you'd sprain they'd sprain	I'd be spraining you'd be spraining he'd be spraining we'd be spraining you'd be spraining they'd be spraining
Perfect	V-ing perfect
I should've sprained you should've sprained he should've sprained we should've sprained you should've sprained they should've sprained	I should've been spraining you should've been spraining he should've been spraining we should've been spraining you should've been spraining they should've been spraining

Negation

Simple form	V-ing form
I shouldn't sprain you shouldn't sprain he shouldn't sprain we shouldn't sprain you shouldn't sprain they shouldn't sprain	I shouldn't be spraining you shouldn't be spraining he shouldn't be spraining we shouldn't be spraining you shouldn't be spraining they shouldn't be spraining
Perfect	V-ing perfect
I shouldn't have sprained you shouldn't have sprained he shouldn't have sprained we shouldn't have sprained you shouldn't have sprained they shouldn't have sprained	I shouldn't have been spraining you shouldn't have been spraining he shouldn't have been spraining we shouldn't have been spraining you shouldn't have been spraining they shouldn't have been spraining

Interrogative form

Simple form	V-ing form
should I sprain? should you sprain? should he sprain? should we sprain? should you sprain? should they sprain?	should I be spraining? should you be spraining? should he be spraining? should we be spraining? should you be spraining? should they be spraining?
Perfect	V-ing perfect
should I have sprained? should you have sprained? should he have sprained? should we have sprained? should you have sprained? should they have sprained?	should I have been spraining? should you have been spraining? should he have been spraining? should we have been spraining? should you have been spraining? should they have been spraining?

Interro-negative form

Simple form	V-ing form
shouldn't I sprain? shouldn't you sprain? shouldn't he sprain? shouldn't we sprain? shouldn't you sprain? shouldn't they sprain?	shouldn't I be spraining? shouldn't you be spraining? shouldn't he be spraining? shouldn't we be spraining? shouldn't you be spraining? shouldn't they be spraining?
Perfect	V-ing perfect
shouldn't I have sprained? shouldn't you have sprained? shouldn't he have sprained? shouldn't we have sprained? shouldn't you have sprained? shouldn't they have sprained?	shouldn't I have been spraining? shouldn't you have been spraining? shouldn't he have been spraining? shouldn't we have been spraining? shouldn't you have been spraining? shouldn't they have been spraining?