should refrain
Regular verb: refrain - refrained- refrained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd refrain
you'd refrain
he'd refrain
we'd refrain
you'd refrain
they'd refrain 	I'd be refraining
you'd be refraining
he'd be refraining
we'd be refraining
you'd be refraining
they'd be refraining	I should've refrained
you should've refrained
he should've refrained
we should've refrained
you should've refrained
they should've refrained	I should've been refraining
you should've been refraining
he should've been refraining
we should've been refraining
you should've been refraining
they should've been refraining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't refrain
you shouldn't refrain
he shouldn't refrain
we shouldn't refrain
you shouldn't refrain
they shouldn't refrain 	I shouldn't be refraining
you shouldn't be refraining
he shouldn't be refraining
we shouldn't be refraining
you shouldn't be refraining
they shouldn't be refraining	I shouldn't have refrained
you shouldn't have refrained
he shouldn't have refrained
we shouldn't have refrained
you shouldn't have refrained
they shouldn't have refrained	I shouldn't have been refraining
you shouldn't have been refraining
he shouldn't have been refraining
we shouldn't have been refraining
you shouldn't have been refraining
they shouldn't have been refraining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I refrain?
should you refrain?
should he refrain?
should we refrain?
should you refrain?
should they refrain? 	should I be refraining?
should you be refraining?
should he be refraining?
should we be refraining?
should you be refraining?
should they be refraining? 	should I have refrained?
should you have refrained?
should he have refrained?
should we have refrained?
should you have refrained?
should they have refrained? 	should I have been refraining?
should you have been refraining?
should he have been refraining?
should we have been refraining?
should you have been refraining?
should they have been refraining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I refrain?
shouldn't you refrain?
shouldn't he refrain?
shouldn't we refrain?
shouldn't you refrain?
shouldn't they refrain? 	shouldn't I be refraining?
shouldn't you be refraining?
shouldn't he be refraining?
shouldn't we be refraining?
shouldn't you be refraining?
shouldn't they be refraining? 	shouldn't I have refrained?
shouldn't you have refrained?
shouldn't he have refrained?
shouldn't we have refrained?
shouldn't you have refrained?
shouldn't they have refrained? 	shouldn't I have been refraining?
shouldn't you have been refraining?
shouldn't he have been refraining?
shouldn't we have been refraining?
shouldn't you have been refraining?
shouldn't they have been refraining?