could retile
Regular verb: retile - retiled- retiled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could retile
you could retile
he could retile
we could retile
you could retile
they could retile 	I could be retiling
you could be retiling
he could be retiling
we could be retiling
you could be retiling
they could be retiling	I could have retiled
you could have retiled
he could have retiled
we could have retiled
you could have retiled
they could have retiled	I could have been retiling
you could have been retiling
he could have been retiling
we could have been retiling
you could have been retiling
they could have been retiling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not retile
you could not retile
he could not retile
we could not retile
you could not retile
they could not retile 	I could not be retiling
you could not be retiling
he could not be retiling
we could not be retiling
you could not be retiling
they could not be retiling	I could not have retiled
you could not have retiled
he could not have retiled
we could not have retiled
you could not have retiled
they could not have retiled	I could not have been retiling
you could not have been retiling
he could not have been retiling
we could not have been retiling
you could not have been retiling
they could not have been retiling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I retile?
could you retile?
could he retile?
could we retile?
could you retile?
could they retile? 	could I be retiling?
could you be retiling?
could he be retiling?
could we be retiling?
could you be retiling?
could they be retiling? 	could I have retiled?
could you have retiled?
could he have retiled?
could we have retiled?
could you have retiled?
could they have retiled? 	could I have been retiling?
could you have been retiling?
could he have been retiling?
could we have been retiling?
could you have been retiling?
could they have been retiling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not retile?
could you not retile?
could he not retile?
could we not retile?
could you not retile?
could they not retile? 	could I not be retiling?
could you not be retiling?
could he not be retiling?
could we not be retiling?
could you not be retiling?
could they not be retiling? 	could I not have retiled?
could you not have retiled?
could he not have retiled?
could we not have retiled?
could you not have retiled?
could they not have retiled? 	could I not have been retiling?
could you not have been retiling?
could he not have been retiling?
could we not have been retiling?
could you not have been retiling?
could they not have been retiling?