could interleave
Verbo regular: interleave - interleaved- interleaved

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could interleave
you could interleave
he could interleave
we could interleave
you could interleave
they could interleave 	I could be interleaving
you could be interleaving
he could be interleaving
we could be interleaving
you could be interleaving
they could be interleaving	I could have interleaved
you could have interleaved
he could have interleaved
we could have interleaved
you could have interleaved
they could have interleaved	I could have been interleaving
you could have been interleaving
he could have been interleaving
we could have been interleaving
you could have been interleaving
they could have been interleaving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't interleave
you couldn't interleave
he couldn't interleave
we couldn't interleave
you couldn't interleave
they couldn't interleave 	I couldn't be interleaving
you couldn't be interleaving
he couldn't be interleaving
we couldn't be interleaving
you couldn't be interleaving
they couldn't be interleaving	I couldn't have interleaved
you couldn't have interleaved
he couldn't have interleaved
we couldn't have interleaved
you couldn't have interleaved
they couldn't have interleaved	I couldn't have been interleaving
you couldn't have been interleaving
he couldn't have been interleaving
we couldn't have been interleaving
you couldn't have been interleaving
they couldn't have been interleaving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I interleave?
could you interleave?
could he interleave?
could we interleave?
could you interleave?
could they interleave? 	could I be interleaving?
could you be interleaving?
could he be interleaving?
could we be interleaving?
could you be interleaving?
could they be interleaving? 	could I have interleaved?
could you have interleaved?
could he have interleaved?
could we have interleaved?
could you have interleaved?
could they have interleaved? 	could I have been interleaving?
could you have been interleaving?
could he have been interleaving?
could we have been interleaving?
could you have been interleaving?
could they have been interleaving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I interleave?
couldn't you interleave?
couldn't he interleave?
couldn't we interleave?
couldn't you interleave?
couldn't they interleave? 	couldn't I be interleaving?
couldn't you be interleaving?
couldn't he be interleaving?
couldn't we be interleaving?
couldn't you be interleaving?
couldn't they be interleaving? 	couldn't I have interleaved?
couldn't you have interleaved?
couldn't he have interleaved?
couldn't we have interleaved?
couldn't you have interleaved?
couldn't they have interleaved? 	couldn't I have been interleaving?
couldn't you have been interleaving?
couldn't he have been interleaving?
couldn't we have been interleaving?
couldn't you have been interleaving?
couldn't they have been interleaving?