could pattern
Verbo regular: pattern - patterned- patterned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could pattern
you could pattern
he could pattern
we could pattern
you could pattern
they could pattern 	I could be patterning
you could be patterning
he could be patterning
we could be patterning
you could be patterning
they could be patterning	I could have patterned
you could have patterned
he could have patterned
we could have patterned
you could have patterned
they could have patterned	I could have been patterning
you could have been patterning
he could have been patterning
we could have been patterning
you could have been patterning
they could have been patterning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not pattern
you could not pattern
he could not pattern
we could not pattern
you could not pattern
they could not pattern 	I could not be patterning
you could not be patterning
he could not be patterning
we could not be patterning
you could not be patterning
they could not be patterning	I could not have patterned
you could not have patterned
he could not have patterned
we could not have patterned
you could not have patterned
they could not have patterned	I could not have been patterning
you could not have been patterning
he could not have been patterning
we could not have been patterning
you could not have been patterning
they could not have been patterning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I pattern?
could you pattern?
could he pattern?
could we pattern?
could you pattern?
could they pattern? 	could I be patterning?
could you be patterning?
could he be patterning?
could we be patterning?
could you be patterning?
could they be patterning? 	could I have patterned?
could you have patterned?
could he have patterned?
could we have patterned?
could you have patterned?
could they have patterned? 	could I have been patterning?
could you have been patterning?
could he have been patterning?
could we have been patterning?
could you have been patterning?
could they have been patterning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not pattern?
could you not pattern?
could he not pattern?
could we not pattern?
could you not pattern?
could they not pattern? 	could I not be patterning?
could you not be patterning?
could he not be patterning?
could we not be patterning?
could you not be patterning?
could they not be patterning? 	could I not have patterned?
could you not have patterned?
could he not have patterned?
could we not have patterned?
could you not have patterned?
could they not have patterned? 	could I not have been patterning?
could you not have been patterning?
could he not have been patterning?
could we not have been patterning?
could you not have been patterning?
could they not have been patterning?