could spam
Regular verb: spam - spamed- spamed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could spam
you could spam
she could spam
we could spam
you could spam
they could spam 	I could be spaming
you could be spaming
she could be spaming
we could be spaming
you could be spaming
they could be spaming	I could have spamed
you could have spamed
she could have spamed
we could have spamed
you could have spamed
they could have spamed	I could have been spaming
you could have been spaming
she could have been spaming
we could have been spaming
you could have been spaming
they could have been spaming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not spam
you could not spam
she could not spam
we could not spam
you could not spam
they could not spam 	I could not be spaming
you could not be spaming
she could not be spaming
we could not be spaming
you could not be spaming
they could not be spaming	I could not have spamed
you could not have spamed
she could not have spamed
we could not have spamed
you could not have spamed
they could not have spamed	I could not have been spaming
you could not have been spaming
she could not have been spaming
we could not have been spaming
you could not have been spaming
they could not have been spaming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I spam?
could you spam?
could she spam?
could we spam?
could you spam?
could they spam? 	could I be spaming?
could you be spaming?
could she be spaming?
could we be spaming?
could you be spaming?
could they be spaming? 	could I have spamed?
could you have spamed?
could she have spamed?
could we have spamed?
could you have spamed?
could they have spamed? 	could I have been spaming?
could you have been spaming?
could she have been spaming?
could we have been spaming?
could you have been spaming?
could they have been spaming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not spam?
could you not spam?
could she not spam?
could we not spam?
could you not spam?
could they not spam? 	could I not be spaming?
could you not be spaming?
could she not be spaming?
could we not be spaming?
could you not be spaming?
could they not be spaming? 	could I not have spamed?
could you not have spamed?
could she not have spamed?
could we not have spamed?
could you not have spamed?
could they not have spamed? 	could I not have been spaming?
could you not have been spaming?
could she not have been spaming?
could we not have been spaming?
could you not have been spaming?
could they not have been spaming?