can stain
Regular verb: stain - stained- stained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can stain
you can stain
she can stain
we can stain
you can stain
they can stain 	I can be staining
you can be staining
she can be staining
we can be staining
you can be staining
they can be staining	I can have stained
you can have stained
she can have stained
we can have stained
you can have stained
they can have stained	I can have been staining
you can have been staining
she can have been staining
we can have been staining
you can have been staining
they can have been staining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot stain
you cannot stain
she cannot stain
we cannot stain
you cannot stain
they cannot stain 	I cannot be staining
you cannot be staining
she cannot be staining
we cannot be staining
you cannot be staining
they cannot be staining	I cannot have stained
you cannot have stained
she cannot have stained
we cannot have stained
you cannot have stained
they cannot have stained	I cannot have been staining
you cannot have been staining
she cannot have been staining
we cannot have been staining
you cannot have been staining
they cannot have been staining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I stain?
can you stain?
can she stain?
can we stain?
can you stain?
can they stain? 	can I be staining?
can you be staining?
can she be staining?
can we be staining?
can you be staining?
can they be staining? 	can I have stained?
can you have stained?
can she have stained?
can we have stained?
can you have stained?
can they have stained? 	can I have been staining?
can you have been staining?
can she have been staining?
can we have been staining?
can you have been staining?
can they have been staining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not stain?
can you not stain?
can she not stain?
can we not stain?
can you not stain?
can they not stain? 	can I not be staining?
can you not be staining?
can she not be staining?
can we not be staining?
can you not be staining?
can they not be staining? 	can I not have stained?
can you not have stained?
can she not have stained?
can we not have stained?
can you not have stained?
can they not have stained? 	can I not have been staining?
can you not have been staining?
can she not have been staining?
can we not have been staining?
can you not have been staining?
can they not have been staining?