could interline
Verbo regular: interline - interlined- interlined

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could interline
you could interline
he could interline
we could interline
you could interline
they could interline 	I could be interlining
you could be interlining
he could be interlining
we could be interlining
you could be interlining
they could be interlining	I could have interlined
you could have interlined
he could have interlined
we could have interlined
you could have interlined
they could have interlined	I could have been interlining
you could have been interlining
he could have been interlining
we could have been interlining
you could have been interlining
they could have been interlining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't interline
you couldn't interline
he couldn't interline
we couldn't interline
you couldn't interline
they couldn't interline 	I couldn't be interlining
you couldn't be interlining
he couldn't be interlining
we couldn't be interlining
you couldn't be interlining
they couldn't be interlining	I couldn't have interlined
you couldn't have interlined
he couldn't have interlined
we couldn't have interlined
you couldn't have interlined
they couldn't have interlined	I couldn't have been interlining
you couldn't have been interlining
he couldn't have been interlining
we couldn't have been interlining
you couldn't have been interlining
they couldn't have been interlining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I interline?
could you interline?
could he interline?
could we interline?
could you interline?
could they interline? 	could I be interlining?
could you be interlining?
could he be interlining?
could we be interlining?
could you be interlining?
could they be interlining? 	could I have interlined?
could you have interlined?
could he have interlined?
could we have interlined?
could you have interlined?
could they have interlined? 	could I have been interlining?
could you have been interlining?
could he have been interlining?
could we have been interlining?
could you have been interlining?
could they have been interlining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I interline?
couldn't you interline?
couldn't he interline?
couldn't we interline?
couldn't you interline?
couldn't they interline? 	couldn't I be interlining?
couldn't you be interlining?
couldn't he be interlining?
couldn't we be interlining?
couldn't you be interlining?
couldn't they be interlining? 	couldn't I have interlined?
couldn't you have interlined?
couldn't he have interlined?
couldn't we have interlined?
couldn't you have interlined?
couldn't they have interlined? 	couldn't I have been interlining?
couldn't you have been interlining?
couldn't he have been interlining?
couldn't we have been interlining?
couldn't you have been interlining?
couldn't they have been interlining?