can sprain
Regular verb: sprain - sprained- sprained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can sprain
you can sprain
he can sprain
we can sprain
you can sprain
they can sprain 	I can be spraining
you can be spraining
he can be spraining
we can be spraining
you can be spraining
they can be spraining	I can have sprained
you can have sprained
he 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
he 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 cannot sprain
you cannot sprain
he cannot sprain
we cannot sprain
you cannot sprain
they cannot sprain 	I cannot be spraining
you cannot be spraining
he cannot be spraining
we cannot be spraining
you cannot be spraining
they cannot be spraining	I cannot have sprained
you cannot have sprained
he cannot have sprained
we cannot have sprained
you cannot have sprained
they cannot have sprained	I cannot have been spraining
you cannot have been spraining
he cannot have been spraining
we cannot have been spraining
you cannot have been spraining
they cannot have been spraining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I sprain?
can you sprain?
can he sprain?
can we sprain?
can you sprain?
can they sprain? 	can I be spraining?
can you be spraining?
can he be spraining?
can we be spraining?
can you be spraining?
can they be spraining? 	can I have sprained?
can you have sprained?
can he 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 he 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 I not sprain?
can you not sprain?
can he not sprain?
can we not sprain?
can you not sprain?
can they not sprain? 	can I not be spraining?
can you not be spraining?
can he not be spraining?
can we not be spraining?
can you not be spraining?
can they not be spraining? 	can I not have sprained?
can you not have sprained?
can he not have sprained?
can we not have sprained?
can you not have sprained?
can they not have sprained? 	can I not have been spraining?
can you not have been spraining?
can he not have been spraining?
can we not have been spraining?
can you not have been spraining?
can they not have been spraining?