can sprain
Regular verb: sprain - sprained- sprained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can sprain
you can sprain
she can sprain
we can sprain
you can sprain
they can sprain 	I can be spraining
you can be spraining
she can be spraining
we can be spraining
you can be spraining
they can be spraining	I can have sprained
you can have sprained
she can have sprained
we can have sprained
you can have sprained
they can have sprained	I can have been spraining
you can have been spraining
she can have been spraining
we can have been spraining
you can have been spraining
they can have been spraining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't sprain
you can't sprain
she can't sprain
we can't sprain
you can't sprain
they can't sprain 	I can't be spraining
you can't be spraining
she can't be spraining
we can't be spraining
you can't be spraining
they can't be spraining	I can't have sprained
you can't have sprained
she can't have sprained
we can't have sprained
you can't have sprained
they can't have sprained	I can't have been spraining
you can't have been spraining
she can't have been spraining
we can't have been spraining
you can't have been spraining
they can't have been spraining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I sprain?
can you sprain?
can she sprain?
can we sprain?
can you sprain?
can they sprain? 	can I be spraining?
can you be spraining?
can she be spraining?
can we be spraining?
can you be spraining?
can they be spraining? 	can I have sprained?
can you have sprained?
can she have sprained?
can we have sprained?
can you have sprained?
can they have sprained? 	can I have been spraining?
can you have been spraining?
can she have been spraining?
can we have been spraining?
can you have been spraining?
can they have been spraining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I sprain?
can't you sprain?
can't she sprain?
can't we sprain?
can't you sprain?
can't they sprain? 	can't I be spraining?
can't you be spraining?
can't she be spraining?
can't we be spraining?
can't you be spraining?
can't they be spraining? 	can't I have sprained?
can't you have sprained?
can't she have sprained?
can't we have sprained?
can't you have sprained?
can't they have sprained? 	can't I have been spraining?
can't you have been spraining?
can't she have been spraining?
can't we have been spraining?
can't you have been spraining?
can't they have been spraining?