could overlay
Irregular verb: overlay - overlaid- overlaid

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could overlay
you could overlay
he could overlay
we could overlay
you could overlay
they could overlay 	I could be overlaying
you could be overlaying
he could be overlaying
we could be overlaying
you could be overlaying
they could be overlaying	I could have overlaid
you could have overlaid
he could have overlaid
we could have overlaid
you could have overlaid
they could have overlaid	I could have been overlaying
you could have been overlaying
he could have been overlaying
we could have been overlaying
you could have been overlaying
they could have been overlaying	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not overlay
you could not overlay
he could not overlay
we could not overlay
you could not overlay
they could not overlay 	I could not be overlaying
you could not be overlaying
he could not be overlaying
we could not be overlaying
you could not be overlaying
they could not be overlaying	I could not have overlaid
you could not have overlaid
he could not have overlaid
we could not have overlaid
you could not have overlaid
they could not have overlaid	I could not have been overlaying
you could not have been overlaying
he could not have been overlaying
we could not have been overlaying
you could not have been overlaying
they could not have been overlaying	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I overlay?
could you overlay?
could he overlay?
could we overlay?
could you overlay?
could they overlay? 	could I be overlaying?
could you be overlaying?
could he be overlaying?
could we be overlaying?
could you be overlaying?
could they be overlaying? 	could I have overlaid?
could you have overlaid?
could he have overlaid?
could we have overlaid?
could you have overlaid?
could they have overlaid? 	could I have been overlaying?
could you have been overlaying?
could he have been overlaying?
could we have been overlaying?
could you have been overlaying?
could they have been overlaying? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not overlay?
could you not overlay?
could he not overlay?
could we not overlay?
could you not overlay?
could they not overlay? 	could I not be overlaying?
could you not be overlaying?
could he not be overlaying?
could we not be overlaying?
could you not be overlaying?
could they not be overlaying? 	could I not have overlaid?
could you not have overlaid?
could he not have overlaid?
could we not have overlaid?
could you not have overlaid?
could they not have overlaid? 	could I not have been overlaying?
could you not have been overlaying?
could he not have been overlaying?
could we not have been overlaying?
could you not have been overlaying?
could they not have been overlaying?