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 couldn't layer
you couldn't layer
he couldn't layer
we couldn't layer
you couldn't layer
they couldn't layer 	I couldn't be layering
you couldn't be layering
he couldn't be layering
we couldn't be layering
you couldn't be layering
they couldn't be layering	I couldn't have layered
you couldn't have layered
he couldn't have layered
we couldn't have layered
you couldn't have layered
they couldn't have layered	I couldn't have been layering
you couldn't have been layering
he couldn't have been layering
we couldn't have been layering
you couldn't have been layering
they couldn't 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 	
couldn't I layer?
couldn't you layer?
couldn't he layer?
couldn't we layer?
couldn't you layer?
couldn't they layer? 	couldn't I be layering?
couldn't you be layering?
couldn't he be layering?
couldn't we be layering?
couldn't you be layering?
couldn't they be layering? 	couldn't I have layered?
couldn't you have layered?
couldn't he have layered?
couldn't we have layered?
couldn't you have layered?
couldn't they have layered? 	couldn't I have been layering?
couldn't you have been layering?
couldn't he have been layering?
couldn't we have been layering?
couldn't you have been layering?
couldn't they have been layering?