could layer
Regular verb: layer - layered- layered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could layer
you could layer
he could layer
we could layer
you could layer
they could layer 	I could be layering
you could be layering
he could be layering
we could be layering
you could be layering
they could be layering	I could have layered
you could have layered
he could have layered
we could have layered
you could have layered
they could have layered	I could have been layering
you could have been layering
he could have been layering
we could have been layering
you could have been layering
they could have been layering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not layer
you could not layer
he could not layer
we could not layer
you could not layer
they could not layer 	I could not be layering
you could not be layering
he could not be layering
we could not be layering
you could not be layering
they could not be layering	I could not have layered
you could not have layered
he could not have layered
we could not have layered
you could not have layered
they could not have layered	I could not have been layering
you could not have been layering
he could not have been layering
we could not have been layering
you could not have been layering
they could not have been layering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I layer?
could you layer?
could he layer?
could we layer?
could you layer?
could they layer? 	could I be layering?
could you be layering?
could he be layering?
could we be layering?
could you be layering?
could they be layering? 	could I have layered?
could you have layered?
could he have layered?
could we have layered?
could you have layered?
could they have layered? 	could I have been layering?
could you have been layering?
could he have been layering?
could we have been layering?
could you have been layering?
could they have been layering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not layer?
could you not layer?
could he not layer?
could we not layer?
could you not layer?
could they not layer? 	could I not be layering?
could you not be layering?
could he not be layering?
could we not be layering?
could you not be layering?
could they not be layering? 	could I not have layered?
could you not have layered?
could he not have layered?
could we not have layered?
could you not have layered?
could they not have layered? 	could I not have been layering?
could you not have been layering?
could he not have been layering?
could we not have been layering?
could you not have been layering?
could they not have been layering?