can staple
Regular verb: staple - stapled- stapled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can staple
you can staple
she can staple
we can staple
you can staple
they can staple 	I can be stapling
you can be stapling
she can be stapling
we can be stapling
you can be stapling
they can be stapling	I can have stapled
you can have stapled
she can have stapled
we can have stapled
you can have stapled
they can have stapled	I can have been stapling
you can have been stapling
she can have been stapling
we can have been stapling
you can have been stapling
they can have been stapling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot staple
you cannot staple
she cannot staple
we cannot staple
you cannot staple
they cannot staple 	I cannot be stapling
you cannot be stapling
she cannot be stapling
we cannot be stapling
you cannot be stapling
they cannot be stapling	I cannot have stapled
you cannot have stapled
she cannot have stapled
we cannot have stapled
you cannot have stapled
they cannot have stapled	I cannot have been stapling
you cannot have been stapling
she cannot have been stapling
we cannot have been stapling
you cannot have been stapling
they cannot have been stapling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I staple?
can you staple?
can she staple?
can we staple?
can you staple?
can they staple? 	can I be stapling?
can you be stapling?
can she be stapling?
can we be stapling?
can you be stapling?
can they be stapling? 	can I have stapled?
can you have stapled?
can she have stapled?
can we have stapled?
can you have stapled?
can they have stapled? 	can I have been stapling?
can you have been stapling?
can she have been stapling?
can we have been stapling?
can you have been stapling?
can they have been stapling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not staple?
can you not staple?
can she not staple?
can we not staple?
can you not staple?
can they not staple? 	can I not be stapling?
can you not be stapling?
can she not be stapling?
can we not be stapling?
can you not be stapling?
can they not be stapling? 	can I not have stapled?
can you not have stapled?
can she not have stapled?
can we not have stapled?
can you not have stapled?
can they not have stapled? 	can I not have been stapling?
can you not have been stapling?
can she not have been stapling?
can we not have been stapling?
can you not have been stapling?
can they not have been stapling?