can refrain
Regular verb: refrain - refrained- refrained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can refrain
you can refrain
she can refrain
we can refrain
you can refrain
they can refrain 	I can be refraining
you can be refraining
she can be refraining
we can be refraining
you can be refraining
they can be refraining	I can have refrained
you can have refrained
she can have refrained
we can have refrained
you can have refrained
they can have refrained	I can have been refraining
you can have been refraining
she can have been refraining
we can have been refraining
you can have been refraining
they can have been refraining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot refrain
you cannot refrain
she cannot refrain
we cannot refrain
you cannot refrain
they cannot refrain 	I cannot be refraining
you cannot be refraining
she cannot be refraining
we cannot be refraining
you cannot be refraining
they cannot be refraining	I cannot have refrained
you cannot have refrained
she cannot have refrained
we cannot have refrained
you cannot have refrained
they cannot have refrained	I cannot have been refraining
you cannot have been refraining
she cannot have been refraining
we cannot have been refraining
you cannot have been refraining
they cannot have been refraining	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not refrain?
can you not refrain?
can she not refrain?
can we not refrain?
can you not refrain?
can they not refrain? 	can I not be refraining?
can you not be refraining?
can she not be refraining?
can we not be refraining?
can you not be refraining?
can they not be refraining? 	can I not have refrained?
can you not have refrained?
can she not have refrained?
can we not have refrained?
can you not have refrained?
can they not have refrained? 	can I not have been refraining?
can you not have been refraining?
can she not have been refraining?
can we not have been refraining?
can you not have been refraining?
can they not have been refraining?