could convolve
Verbo regular: convolve - convolved- convolved

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could convolve
you could convolve
he could convolve
we could convolve
you could convolve
they could convolve 	I could be convolving
you could be convolving
he could be convolving
we could be convolving
you could be convolving
they could be convolving	I could have convolved
you could have convolved
he could have convolved
we could have convolved
you could have convolved
they could have convolved	I could have been convolving
you could have been convolving
he could have been convolving
we could have been convolving
you could have been convolving
they could have been convolving	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't convolve
you couldn't convolve
he couldn't convolve
we couldn't convolve
you couldn't convolve
they couldn't convolve 	I couldn't be convolving
you couldn't be convolving
he couldn't be convolving
we couldn't be convolving
you couldn't be convolving
they couldn't be convolving	I couldn't have convolved
you couldn't have convolved
he couldn't have convolved
we couldn't have convolved
you couldn't have convolved
they couldn't have convolved	I couldn't have been convolving
you couldn't have been convolving
he couldn't have been convolving
we couldn't have been convolving
you couldn't have been convolving
they couldn't have been convolving	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I convolve?
could you convolve?
could he convolve?
could we convolve?
could you convolve?
could they convolve? 	could I be convolving?
could you be convolving?
could he be convolving?
could we be convolving?
could you be convolving?
could they be convolving? 	could I have convolved?
could you have convolved?
could he have convolved?
could we have convolved?
could you have convolved?
could they have convolved? 	could I have been convolving?
could you have been convolving?
could he have been convolving?
could we have been convolving?
could you have been convolving?
could they have been convolving? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I convolve?
couldn't you convolve?
couldn't he convolve?
couldn't we convolve?
couldn't you convolve?
couldn't they convolve? 	couldn't I be convolving?
couldn't you be convolving?
couldn't he be convolving?
couldn't we be convolving?
couldn't you be convolving?
couldn't they be convolving? 	couldn't I have convolved?
couldn't you have convolved?
couldn't he have convolved?
couldn't we have convolved?
couldn't you have convolved?
couldn't they have convolved? 	couldn't I have been convolving?
couldn't you have been convolving?
couldn't he have been convolving?
couldn't we have been convolving?
couldn't you have been convolving?
couldn't they have been convolving?