could spile
Regular verb: spile - spiled- spiled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could spile
you could spile
she could spile
we could spile
you could spile
they could spile 	I could be spiling
you could be spiling
she could be spiling
we could be spiling
you could be spiling
they could be spiling	I could have spiled
you could have spiled
she could have spiled
we could have spiled
you could have spiled
they could have spiled	I could have been spiling
you could have been spiling
she could have been spiling
we could have been spiling
you could have been spiling
they could have been spiling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not spile
you could not spile
she could not spile
we could not spile
you could not spile
they could not spile 	I could not be spiling
you could not be spiling
she could not be spiling
we could not be spiling
you could not be spiling
they could not be spiling	I could not have spiled
you could not have spiled
she could not have spiled
we could not have spiled
you could not have spiled
they could not have spiled	I could not have been spiling
you could not have been spiling
she could not have been spiling
we could not have been spiling
you could not have been spiling
they could not have been spiling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I spile?
could you spile?
could she spile?
could we spile?
could you spile?
could they spile? 	could I be spiling?
could you be spiling?
could she be spiling?
could we be spiling?
could you be spiling?
could they be spiling? 	could I have spiled?
could you have spiled?
could she have spiled?
could we have spiled?
could you have spiled?
could they have spiled? 	could I have been spiling?
could you have been spiling?
could she have been spiling?
could we have been spiling?
could you have been spiling?
could they have been spiling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not spile?
could you not spile?
could she not spile?
could we not spile?
could you not spile?
could they not spile? 	could I not be spiling?
could you not be spiling?
could she not be spiling?
could we not be spiling?
could you not be spiling?
could they not be spiling? 	could I not have spiled?
could you not have spiled?
could she not have spiled?
could we not have spiled?
could you not have spiled?
could they not have spiled? 	could I not have been spiling?
could you not have been spiling?
could she not have been spiling?
could we not have been spiling?
could you not have been spiling?
could they not have been spiling?