can overstrain
Regular verb: overstrain - overstrained- overstrained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can overstrain
you can overstrain
he can overstrain
we can overstrain
you can overstrain
they can overstrain 	I can be overstraining
you can be overstraining
he can be overstraining
we can be overstraining
you can be overstraining
they can be overstraining	I can have overstrained
you can have overstrained
he can have overstrained
we can have overstrained
you can have overstrained
they can have overstrained	I can have been overstraining
you can have been overstraining
he can have been overstraining
we can have been overstraining
you can have been overstraining
they can have been overstraining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't overstrain
you can't overstrain
he can't overstrain
we can't overstrain
you can't overstrain
they can't overstrain 	I can't be overstraining
you can't be overstraining
he can't be overstraining
we can't be overstraining
you can't be overstraining
they can't be overstraining	I can't have overstrained
you can't have overstrained
he can't have overstrained
we can't have overstrained
you can't have overstrained
they can't have overstrained	I can't have been overstraining
you can't have been overstraining
he can't have been overstraining
we can't have been overstraining
you can't have been overstraining
they can't have been overstraining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I overstrain?
can you overstrain?
can he overstrain?
can we overstrain?
can you overstrain?
can they overstrain? 	can I be overstraining?
can you be overstraining?
can he be overstraining?
can we be overstraining?
can you be overstraining?
can they be overstraining? 	can I have overstrained?
can you have overstrained?
can he have overstrained?
can we have overstrained?
can you have overstrained?
can they have overstrained? 	can I have been overstraining?
can you have been overstraining?
can he have been overstraining?
can we have been overstraining?
can you have been overstraining?
can they have been overstraining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I overstrain?
can't you overstrain?
can't he overstrain?
can't we overstrain?
can't you overstrain?
can't they overstrain? 	can't I be overstraining?
can't you be overstraining?
can't he be overstraining?
can't we be overstraining?
can't you be overstraining?
can't they be overstraining? 	can't I have overstrained?
can't you have overstrained?
can't he have overstrained?
can't we have overstrained?
can't you have overstrained?
can't they have overstrained? 	can't I have been overstraining?
can't you have been overstraining?
can't he have been overstraining?
can't we have been overstraining?
can't you have been overstraining?
can't they have been overstraining?